add peruser-dc patch

1 files changed, 1211 insertions, 0 deletions

diff --git a/2.2/patches/22_all_peruser_0.3.0-dc3.patch b/2.2/patches/22_all_peruser_0.3.0-dc3.patch
new file mode 100644
index 0000000..9bb7d17
--- /dev/null
+++ b/2.2/patches/22_all_peruser_0.3.0-dc3.patch
@@ -0,0 +1,1211 @@
+--- httpd-2.2.3/server/mpm/experimental/peruser/mpm_default.h	2009-05-27 15:09:19.000000000 +0300
++++ httpd-2.2.3-dc/server/mpm/experimental/peruser/mpm_default.h	2009-05-28 10:10:42.000000000 +0300
+@@ -77,6 +77,12 @@
+ #define DEFAULT_MIN_FREE_PROCESSORS 2
+ #endif
+ 
++/* Maximum --- more than this, and idle processors will be killed (0 = disable) */
++
++#ifndef DEFAULT_MAX_FREE_PROCESSORS
++#define DEFAULT_MAX_FREE_PROCESSORS 0
++#endif
++
+ /* Maximum processors per ServerEnvironment */
+ 
+ #ifndef DEFAULT_MAX_PROCESSORS
+@@ -107,4 +113,50 @@
+ #define DEFAULT_MAX_REQUESTS_PER_CHILD 10000
+ #endif
+ 
++/* Maximum multiplexers */
++
++#ifndef DEFAULT_MAX_MULTIPLEXERS
++#define DEFAULT_MAX_MULTIPLEXERS 20
++#endif
++
++/* Minimum multiplexers */
++
++#ifndef DEFAULT_MIN_MULTIPLEXERS
++#define DEFAULT_MIN_MULTIPLEXERS 3
++#endif
++
++/* Amount of time a child can run before it expires (0 = turn off) */
++
++#ifndef DEFAULT_EXPIRE_TIMEOUT
++#define DEFAULT_EXPIRE_TIMEOUT 1800
++#endif
++
++/* Amount of time a child can stay idle (0 = turn off) */
++
++#ifndef DEFAULT_IDLE_TIMEOUT
++#define DEFAULT_IDLE_TIMEOUT 900
++#endif
++
++/* Amount of time a multiplexer can stay idle (0 = turn off) */
++
++#ifndef DEFAULT_MULTIPLEXER_IDLE_TIMEOUT
++#define DEFAULT_MULTIPLEXER_IDLE_TIMEOUT 0
++#endif
++
++/* Amount of maximum time a multiplexer can wait for processor if it is busy (0 = never wait)
++ * This is decreased with every busy request
++ */
++
++#ifndef DEFAULT_PROCESSOR_WAIT_TIMEOUT
++#define DEFAULT_PROCESSOR_WAIT_TIMEOUT 5
++#endif
++
++/* The number of different levels there are when a multiplexer is waiting for processor
++ * (between maximum waiting time and no waiting)
++ */
++
++#ifndef DEFAULT_PROCESSOR_WAIT_STEPS
++#define DEFAULT_PROCESSOR_WAIT_STEPS 10
++#endif
++
+ #endif /* AP_MPM_DEFAULT_H */
+--- httpd-2.2.3/server/mpm/experimental/peruser/mpm.h	2009-03-22 22:46:45.000000000 +0200
++++ httpd-2.2.3-dc/server/mpm/experimental/peruser/mpm.h	2009-03-22 22:39:10.000000000 +0200
+@@ -84,6 +84,7 @@
+ #define AP_MPM_USES_POD 1
+ #define MPM_CHILD_PID(i) (ap_scoreboard_image->parent[i].pid)
+ #define MPM_NOTE_CHILD_KILLED(i) (MPM_CHILD_PID(i) = 0)
++#define MPM_VALID_PID(p) (getpgid(p) == getpgrp())
+ #define MPM_ACCEPT_FUNC unixd_accept
+ 
+ extern int ap_threads_per_child;
+--- httpd-2.2.3/server/mpm/experimental/peruser/peruser.c	2009-05-27 15:09:19.000000000 +0300
++++ httpd-2.2.3-dc/server/mpm/experimental/peruser/peruser.c	2009-05-28 13:54:27.000000000 +0300
+@@ -195,20 +195,30 @@
+ 
+ #define CHILD_STATUS_STANDBY  0  /* wait for a request before starting */
+ #define CHILD_STATUS_STARTING 1  /* wait for socket creation */
+-#define CHILD_STATUS_READY    2  /* wait for mux to restart */
+-#define CHILD_STATUS_ACTIVE   3  /* ready to take requests */
++#define CHILD_STATUS_READY    2  /* is ready to take requests */
++#define CHILD_STATUS_ACTIVE   3  /* is currently busy handling requests */
+ #define CHILD_STATUS_RESTART  4  /* child about to die and restart */
+ 
++/* cgroup settings */
++#define CGROUP_TASKS_FILE "/tasks"
++#define CGROUP_TASKS_FILE_LEN 7
++
+ /* config globals */
+ 
+ int ap_threads_per_child=0;         /* Worker threads per child */
+ static apr_proc_mutex_t *accept_mutex;
+ static int ap_min_processors=DEFAULT_MIN_PROCESSORS;
+ static int ap_min_free_processors=DEFAULT_MIN_FREE_PROCESSORS;
++static int ap_max_free_processors=DEFAULT_MAX_FREE_PROCESSORS;
+ static int ap_max_processors=DEFAULT_MAX_PROCESSORS;
++static int ap_min_multiplexers=DEFAULT_MIN_MULTIPLEXERS;
++static int ap_max_multiplexers=DEFAULT_MAX_MULTIPLEXERS;
+ static int ap_daemons_limit=0;      /* MaxClients */
+-static int expire_timeout=1800;
+-static int idle_timeout=900;
++static int expire_timeout=DEFAULT_EXPIRE_TIMEOUT;
++static int idle_timeout=DEFAULT_IDLE_TIMEOUT;
++static int multiplexer_idle_timeout=DEFAULT_MULTIPLEXER_IDLE_TIMEOUT;
++static int processor_wait_timeout=DEFAULT_PROCESSOR_WAIT_TIMEOUT;
++static int processor_wait_steps=DEFAULT_PROCESSOR_WAIT_STEPS;
+ static int server_limit = DEFAULT_SERVER_LIMIT;
+ static int first_server_limit;
+ static int changed_limit_at_restart;
+@@ -222,15 +232,21 @@
+ {
+     int processor_id;
+ 
++    const char *name;	/* Server environment's unique string identifier */
++
+     /* security settings */
+     uid_t uid;          /* user id */
+     gid_t gid;          /* group id */
+     const char *chroot; /* directory to chroot() to, can be null */
++    int nice_lvl;
++    const char *cgroup; /* cgroup directory, can be null */
+ 
+     /* resource settings */
+     int min_processors;
+     int min_free_processors;
++    int max_free_processors;
+     int max_processors;
++    int availability;
+ 
+     /* sockets */
+     int input;          /* The socket descriptor */
+@@ -437,6 +453,25 @@
+     return "UNKNOWN";
+ }
+ 
++char* scoreboard_status_string(int status) {
++    switch(status)
++    {
++        case SERVER_DEAD:  return "DEAD";
++        case SERVER_STARTING: return "STARTING";
++        case SERVER_READY:    return "READY";
++        case SERVER_BUSY_READ:   return "BUSY_READ";
++        case SERVER_BUSY_WRITE:   return "BUSY_WRITE";
++        case SERVER_BUSY_KEEPALIVE:   return "BUSY_KEEPALIVE";
++        case SERVER_BUSY_LOG:   return "BUSY_LOG";
++        case SERVER_BUSY_DNS:   return "BUSY_DNS";
++        case SERVER_CLOSING:   return "CLOSING";
++        case SERVER_GRACEFUL:   return "GRACEFUL";
++        case SERVER_NUM_STATUS:   return "NUM_STATUS";
++    }
++
++    return "UNKNOWN";
++}
++
+ void dump_child_table()
+ {
+ #ifdef MPM_PERUSER_DEBUG
+@@ -511,10 +546,6 @@
+ 
+ static void accept_mutex_on(void)
+ {
+-/* for some reason this fails if we listen on the pipe_of_death.
+-   fortunately I don't think we currently need it */
+-
+-#if 0
+     apr_status_t rv = apr_proc_mutex_lock(accept_mutex);
+     if (rv != APR_SUCCESS) {
+         const char *msg = "couldn't grab the accept mutex";
+@@ -529,12 +560,10 @@
+             exit(APEXIT_CHILDFATAL);
+         }
+     }
+-#endif
+ }
+ 
+ static void accept_mutex_off(void)
+ {
+-#if 0
+     apr_status_t rv = apr_proc_mutex_unlock(accept_mutex);
+     if (rv != APR_SUCCESS) {
+         const char *msg = "couldn't release the accept mutex";
+@@ -552,7 +581,6 @@
+             exit(APEXIT_CHILDFATAL);
+         }
+     }
+-#endif
+ }
+ 
+ /* On some architectures it's safe to do unserialized accept()s in the single
+@@ -715,8 +743,10 @@
+     ret = apr_socket_recv(lr->sd, &pipe_read_char, &n);
+     if (APR_STATUS_IS_EAGAIN(ret))
+     {
+-            /* It lost the lottery. It must continue to suffer
+-             * through a life of servitude. */
++       /* It lost the lottery. It must continue to suffer
++        * through a life of servitude. */
++       _DBG("POD read EAGAIN");
++       return ret;
+     }
+     else
+     {
+@@ -1087,8 +1117,7 @@
+     for(i = 0, total = 0; i < NUM_CHILDS; ++i)
+     {
+         if(CHILD_INFO_TABLE[i].senv == CHILD_INFO_TABLE[child_num].senv &&
+-           (SCOREBOARD_STATUS(i) == SERVER_STARTING ||
+-            SCOREBOARD_STATUS(i) == SERVER_READY))
++           (CHILD_INFO_TABLE[i].status == CHILD_STATUS_READY))
+         {
+             total++;
+         }
+@@ -1116,7 +1145,7 @@
+     apr_bucket *bucket;
+     const apr_array_header_t *headers_in_array;
+     const apr_table_entry_t *headers_in;
+-    int counter;
++    int counter, wait_time, wait_step_size;
+ 
+     apr_socket_t *thesock = ap_get_module_config(r->connection->conn_config, &core_module);
+ 
+@@ -1137,10 +1166,73 @@
+       apr_table_get(r->headers_in, "Host"), my_child_num, processor->senv->output);
+     _DBG("r->the_request=\"%s\" len=%d", r->the_request, strlen(r->the_request));
+ 
+-    ap_get_brigade(r->connection->input_filters, bb, AP_MODE_EXHAUSTIVE, APR_NONBLOCK_READ, len);
++    wait_step_size = 100 / processor_wait_steps;
+ 
+-    /* Scan the brigade looking for heap-buckets */
++    /*	Check if the processor is available */
++    if (total_processors(processor->id) == processor->senv->max_processors &&
++        idle_processors(processor->id) == 0) {
++        /* The processor is currently busy, try to wait (a little) */
++        _DBG("processor seems to be busy, trying to wait for it");
++
++        if (processor->senv->availability == 0) {
++            processor->senv->availability = 0;
++
++            _DBG("processor is very busy (availability = 0) - not passing request");
++
++            ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf,
++                         "Too many requests for processor %s, increase MaxProcessors", processor->senv->name);
++	    
++            /* No point in waiting for the processor, it's very busy */
++            return -1;
++        }
++        
++        /* We sleep a little (depending how available the processor usually is) */
++        int i;
++        
++        wait_time = (processor_wait_timeout / processor_wait_steps) * 1000000;
++
++        for(i = 0; i <= processor->senv->availability; i += wait_step_size) {
++            usleep(wait_time);
+ 
++            /* Check if the processor is ready */
++            if (total_processors(processor->id) < processor->senv->max_processors ||
++                idle_processors(processor->id) > 0) {
++                /* The processor has freed - lets use it */
++                _DBG("processor freed before wait time expired");
++                break;
++            }
++        }
++        
++        if (processor->senv->availability <= wait_step_size) {
++            processor->senv->availability = 0;
++        }
++        else processor->senv->availability -= wait_step_size;
++        
++        /* Check if we waited all the time */
++        if (i > processor->senv->availability) {
++            _DBG("processor is busy - not passing request (availability = %d)",
++                 processor->senv->availability);
++            ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ap_server_conf,
++                         "Too many requests for processor %s, increase MaxProcessors", processor->senv->name);
++            return -1;
++        }
++
++        /* We could increase the availability a little here,
++         * because the processor got freed eventually
++         */
++    }
++    else {
++        /* Smoothly increment the availability back to 100 */
++        if (processor->senv->availability >= 100-wait_step_size) {
++            processor->senv->availability = 100;
++        }
++        else processor->senv->availability += wait_step_size;
++    }
++    
++    ap_get_brigade(r->connection->input_filters, bb, AP_MODE_EXHAUSTIVE, APR_NONBLOCK_READ, len);
++    
++    /* Scan the brigade looking for heap-buckets */
++    
+     _DBG("Scanning the brigade",0);
+     bucket = APR_BRIGADE_FIRST(bb);
+     while (bucket != APR_BRIGADE_SENTINEL(bb) &&
+@@ -1294,12 +1386,22 @@
+     /* -- receive data from socket -- */
+     apr_os_sock_get(&ctrl_sock_fd, lr->sd);
+     _DBG("receiving from sock_fd=%d", ctrl_sock_fd);
+-    ret = recvmsg(ctrl_sock_fd, &msg, 0);
+ 
+-    if(ret == -1)
+-      _DBG("recvmsg failed with error \"%s\"", strerror(errno));
+-    else
+-      _DBG("recvmsg returned %d", ret);
++    // Don't block
++    ret = recvmsg(ctrl_sock_fd, &msg, MSG_DONTWAIT);
++
++    if (ret == -1 && errno == EAGAIN) {
++        _DBG("receive_from_multiplexer recvmsg() EAGAIN, someone was faster");
++        
++        return APR_EAGAIN;
++    }
++    else if (ret == -1) {
++        _DBG("recvmsg failed with error \"%s\"", strerror(errno));
++        
++        // Error, better kill this child to be on the safe side
++        return APR_EGENERAL;
++    }
++    else _DBG("recvmsg returned %d", ret);
+ 
+     /* -- extract socket from the cmsg -- */
+     memcpy(&trans_sock_fd, CMSG_DATA(cmsg), sizeof(trans_sock_fd));
+@@ -1399,10 +1501,58 @@
+     return 0;
+ }
+ 
+-static int peruser_setup_child(int childnum)
++static int peruser_setup_cgroup(int childnum, server_env_t *senv, apr_pool_t *pool)
++{
++    apr_file_t *file;
++    int length;
++    apr_size_t content_len;
++    char *tasks_file, *content, *pos;
++
++    _DBG("starting to add pid to cgroup %s", senv->cgroup);
++
++    length = strlen(senv->cgroup) + CGROUP_TASKS_FILE_LEN;
++    tasks_file = malloc(length);
++
++    if (!tasks_file) return -1;
++
++    pos = apr_cpystrn(tasks_file, senv->cgroup, length);
++    apr_cpystrn(pos, CGROUP_TASKS_FILE, CGROUP_TASKS_FILE_LEN);
++
++    /* Prepare the data to be written to tasks file */
++    content = apr_itoa(pool, ap_my_pid);
++    content_len  = strlen(content);
++
++    _DBG("writing pid %s to tasks file %s", content, tasks_file);
++
++    if (apr_file_open(&file, tasks_file, APR_WRITE, APR_OS_DEFAULT, pool)) {
++        ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL,
++                     "cgroup: unable to open file %s",
++                     tasks_file);
++        free(tasks_file);
++        return OK; /* don't fail if cgroup not available */
++    }
++
++    if (apr_file_write(file, content, &content_len)) {
++   	ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL,
++                     "cgroup: unable to write pid to file %s",
++                     tasks_file);
++    }
++
++    apr_file_close(file);
++
++    free(tasks_file);
++
++    return OK;
++}
++
++static int peruser_setup_child(int childnum, apr_pool_t *pool)
+ {
+     server_env_t *senv = CHILD_INFO_TABLE[childnum].senv;
+ 
++    if (senv->nice_lvl != 0) {
++        nice(senv->nice_lvl);
++    }
++
+     if(senv->chroot) {
+       _DBG("chdir to %s", senv->chroot);
+       if(chdir(senv->chroot)) {
+@@ -1421,6 +1571,10 @@
+       }
+     }
+ 
++    if(senv->cgroup) {
++   	peruser_setup_cgroup(childnum, senv, pool);
++    }
++
+     if (senv->uid == -1 && senv->gid == -1) {
+         return unixd_setup_child();
+     }
+@@ -1594,15 +1748,6 @@
+     {
+         case CHILD_TYPE_MULTIPLEXER:
+             _DBG("MULTIPLEXER %d", my_child_num);
+-
+-            /* update status on processors that are ready to accept requests */
+-            _DBG("updating processor stati", 0);
+-            for(i = 0; i < NUM_CHILDS; ++i)
+-            {
+-                if(CHILD_INFO_TABLE[i].status == CHILD_STATUS_READY)
+-                    CHILD_INFO_TABLE[i].status = CHILD_STATUS_ACTIVE;
+-            }
+-
+             break;
+ 
+         case CHILD_TYPE_PROCESSOR:
+@@ -1626,7 +1771,7 @@
+     apr_os_sock_put(&pod_sock, &fd, pconf);
+     listen_add(pconf, pod_sock, check_pipe_of_death);
+ 
+-    if(peruser_setup_child(my_child_num) != 0)
++    if(peruser_setup_child(my_child_num, pchild) != 0)
+         clean_child_exit(APEXIT_CHILDFATAL);
+ 
+     ap_run_child_init(pchild, ap_server_conf);
+@@ -1670,14 +1815,19 @@
+ 	    clean_child_exit(0);
+ 	}
+ 
+-	(void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);
++        (void) ap_update_child_status(sbh, SERVER_READY, (request_rec *) NULL);
++
++        CHILD_INFO_TABLE[my_child_num].status = CHILD_STATUS_READY;
++        _DBG("Child %d (%s) is now ready", my_child_num, child_type_string(CHILD_INFO_TABLE[my_child_num].type));
+ 
+ 	/*
+ 	 * Wait for an acceptable connection to arrive.
+ 	 */
+ 
+-	/* Lock around "accept", if necessary */
+-	SAFE_ACCEPT(accept_mutex_on());
++        /* Lock around "accept", if necessary */
++        if (CHILD_INFO_TABLE[my_child_num].type == CHILD_TYPE_MULTIPLEXER) {
++            SAFE_ACCEPT(accept_mutex_on());
++        }
+ 
+         if (num_listensocks == 1) {
+             offset = 0;
+@@ -1729,18 +1879,27 @@
+          * defer the exit
+          */
+         status = listensocks[offset].accept_func((void *)&sock, &listensocks[offset], ptrans);
+-        SAFE_ACCEPT(accept_mutex_off()); 	/* unlock after "accept" */
++
++        if (CHILD_INFO_TABLE[my_child_num].type == CHILD_TYPE_MULTIPLEXER) {
++            SAFE_ACCEPT(accept_mutex_off()); 	/* unlock after "accept" */
++        }
+ 
+         if (status == APR_EGENERAL) {
+             /* resource shortage or should-not-occur occured */
+             clean_child_exit(1);
+         }
+-        else if (status != APR_SUCCESS || die_now) {
++        else if (status != APR_SUCCESS || die_now || sock == NULL) {
+             continue;
+         }
+ 
++        if (CHILD_INFO_TABLE[my_child_num].status == CHILD_STATUS_READY) {
++            CHILD_INFO_TABLE[my_child_num].status = CHILD_STATUS_ACTIVE;
++            _DBG("Child %d (%s) is now active", my_child_num, child_type_string(CHILD_INFO_TABLE[my_child_num].type));
++        }
++
+         if (CHILD_INFO_TABLE[my_child_num].type == CHILD_TYPE_PROCESSOR ||
+-            CHILD_INFO_TABLE[my_child_num].type == CHILD_TYPE_WORKER)
++            CHILD_INFO_TABLE[my_child_num].type == CHILD_TYPE_WORKER ||
++            CHILD_INFO_TABLE[my_child_num].type == CHILD_TYPE_MULTIPLEXER)
+         {
+           _DBG("CHECKING IF WE SHOULD CLONE A CHILD...");
+ 
+@@ -1754,8 +1913,11 @@
+ 
+           if(total_processors(my_child_num) <
+               CHILD_INFO_TABLE[my_child_num].senv->max_processors &&
+-            idle_processors(my_child_num) <=
+-              CHILD_INFO_TABLE[my_child_num].senv->min_free_processors)
++            (idle_processors(my_child_num) <=
++              CHILD_INFO_TABLE[my_child_num].senv->min_free_processors ||
++             total_processors(my_child_num) <
++              CHILD_INFO_TABLE[my_child_num].senv->min_processors
++            ))
+           {
+               _DBG("CLONING CHILD");
+               child_clone();
+@@ -1804,46 +1966,80 @@
+     clean_child_exit(0);
+ }
+ 
+-static server_env_t* senv_add(int uid, int gid, const char* chroot)
+-{
++static server_env_t* find_senv_by_name(const char *name) {
+     int i;
+-    int socks[2];
+ 
+-    _DBG("Searching for matching senv...");
++    if (name == NULL) return NULL;
++
++    _DBG("name=%s", name);
++
++    for(i = 0; i < NUM_SENV; i++)
++      {
++          if(SENV[i].name != NULL && !strcmp(SENV[i].name, name)) {
++              return &SENV[i];
++          }
++      }
++
++    return NULL;
++}
++
++static server_env_t* find_matching_senv(server_env_t* senv) {
++    int i;
++
++    _DBG("name=%s uid=%d gid=%d chroot=%s", senv->name, senv->uid, senv->gid, senv->chroot);
+ 
+     for(i = 0; i < NUM_SENV; i++)
+-    {
+-      if(SENV[i].uid == uid && SENV[i].gid == gid &&
+-         (SENV[i].chroot == NULL || !strcmp(SENV[i].chroot, chroot)))
+       {
+-          _DBG("Found existing senv: %i", i);
+-          return &SENV[i];
++          if((senv->name != NULL && SENV[i].name != NULL && !strcmp(SENV[i].name, senv->name)) ||
++             (senv->name == NULL && SENV[i].uid == senv->uid && SENV[i].gid == senv->gid &&
++              (
++               (SENV[i].chroot == NULL && senv->chroot == NULL) ||
++               ((SENV[i].chroot != NULL || senv->chroot != NULL) && !strcmp(SENV[i].chroot, senv->chroot)))
++              )
++             ) {
++              return &SENV[i];
++          }
+       }
++
++    return NULL;
++}
++
++static server_env_t* senv_add(server_env_t *senv)
++{
++    int socks[2];
++    server_env_t *old_senv;
++
++    _DBG("Searching for matching senv...");
++
++    old_senv = find_matching_senv(senv);
++
++    if (old_senv) {
++        _DBG("Found existing senv");
++        senv = old_senv;
++        return old_senv;
+     }
+ 
+     if(NUM_SENV >= server_limit)
+-    {
+-      _DBG("server_limit reached!");
+-      return NULL;
+-    }
++      {
++          _DBG("server_limit reached!");
++          return NULL;
++      }
+ 
+     _DBG("Creating new senv");
+ 
+-    SENV[NUM_SENV].uid = uid;
+-    SENV[NUM_SENV].gid = gid;
+-    SENV[NUM_SENV].chroot = chroot;
+-
+-    SENV[NUM_SENV].min_processors = ap_min_processors;
+-    SENV[NUM_SENV].min_free_processors = ap_min_free_processors;
+-    SENV[NUM_SENV].max_processors = ap_max_processors;
++    memcpy(&SENV[NUM_SENV], senv, sizeof(server_env_t));
++
++    SENV[NUM_SENV].availability = 100;
+ 
+     socketpair(PF_UNIX, SOCK_STREAM, 0, socks);
+     SENV[NUM_SENV].input  = socks[0];
+     SENV[NUM_SENV].output = socks[1];
+ 
++    senv = &SENV[NUM_SENV];
+     return &SENV[server_env_image->control->num++];
+ }
+ 
++
+ static const char* child_clone()
+ {
+     int i;
+@@ -1869,7 +2065,14 @@
+     new = &CHILD_INFO_TABLE[i];
+ 
+     new->senv = this->senv;
+-    new->type = CHILD_TYPE_WORKER;
++
++    if (this->type == CHILD_TYPE_MULTIPLEXER) {
++        new->type = CHILD_TYPE_MULTIPLEXER;
++    }
++    else {
++        new->type = CHILD_TYPE_WORKER;
++    }
++
+     new->sock_fd = this->sock_fd;
+     new->status = CHILD_STATUS_STARTING;
+ 
+@@ -1878,7 +2081,7 @@
+ }
+ 
+ static const char* child_add(int type, int status,
+-                             apr_pool_t *pool, uid_t uid, gid_t gid, const char* chroot)
++                             apr_pool_t *pool, server_env_t *senv)
+ {
+     _DBG("adding child #%d", NUM_CHILDS);
+ 
+@@ -1888,10 +2091,10 @@
+                "Increase NumServers in your config file.";
+     }
+ 
+-       if (chroot && !ap_is_directory(pool, chroot))
+-               return apr_psprintf(pool, "Error: chroot directory [%s] does not exist", chroot);
++       if (senv->chroot && !ap_is_directory(pool, senv->chroot))
++               return apr_psprintf(pool, "Error: chroot directory [%s] does not exist", senv->chroot);
+ 
+-    CHILD_INFO_TABLE[NUM_CHILDS].senv = senv_add(uid, gid, chroot);
++    CHILD_INFO_TABLE[NUM_CHILDS].senv = senv_add(senv);
+ 
+     if(CHILD_INFO_TABLE[NUM_CHILDS].senv == NULL)
+     {
+@@ -1907,10 +2110,10 @@
+     CHILD_INFO_TABLE[NUM_CHILDS].status = status;
+ 
+     _DBG("[%d] uid=%d gid=%d type=%d chroot=%s",
+-         NUM_CHILDS, uid, gid, type,
+-         chroot);
++         NUM_CHILDS, senv->uid, senv->gid, type,
++         senv->chroot);
+ 
+-    if (uid == 0 || gid == 0)
++    if (senv->uid == 0 || senv->gid == 0)
+     {
+         _DBG("Assigning root user/group to a child.", 0);
+     }
+@@ -1957,7 +2160,7 @@
+     (void) ap_update_child_status_from_indexes(slot, 0, SERVER_STARTING,
+                                                (request_rec *) NULL);
+ 
+-    CHILD_INFO_TABLE[slot].status = CHILD_STATUS_ACTIVE;
++    CHILD_INFO_TABLE[slot].status = CHILD_STATUS_READY;
+ 
+ 
+ #ifdef _OSD_POSIX
+@@ -2062,19 +2265,31 @@
+         if(CHILD_INFO_TABLE[i].status == CHILD_STATUS_STARTING)
+           make_child(ap_server_conf, i);
+       }
+-      else if(((CHILD_INFO_TABLE[i].type == CHILD_TYPE_PROCESSOR || 
+-               CHILD_INFO_TABLE[i].type == CHILD_TYPE_WORKER)  &&
+-               ap_scoreboard_image->parent[i].pid > 1) &&
+-               (idle_processors (i) > 1 || total_processes (i) == 1) && (
+-                   (expire_timeout > 0 &&  ap_scoreboard_image->servers[i][0].status != SERVER_DEAD && 
+-                   apr_time_sec(now - ap_scoreboard_image->servers[i][0].last_used) > expire_timeout) ||
+-                   (idle_timeout >   0 &&  ap_scoreboard_image->servers[i][0].status == SERVER_READY &&  
+-                   apr_time_sec(now - ap_scoreboard_image->servers[i][0].last_used) > idle_timeout)))
++      else if(
++    	      (((CHILD_INFO_TABLE[i].type == CHILD_TYPE_PROCESSOR ||
++                 CHILD_INFO_TABLE[i].type == CHILD_TYPE_WORKER)  &&
++                ap_scoreboard_image->parent[i].pid > 1) &&
++               (idle_processors (i) > CHILD_INFO_TABLE[i].senv->min_free_processors || CHILD_INFO_TABLE[i].senv->min_free_processors == 0) &&
++               total_processes (i) > CHILD_INFO_TABLE[i].senv->min_processors && 
++               (
++                (expire_timeout > 0 &&  ap_scoreboard_image->servers[i][0].status != SERVER_DEAD && 
++                 apr_time_sec(now - ap_scoreboard_image->servers[i][0].last_used) > expire_timeout) ||
++                (idle_timeout >   0 &&  ap_scoreboard_image->servers[i][0].status == SERVER_READY &&  
++                 apr_time_sec(now - ap_scoreboard_image->servers[i][0].last_used) > idle_timeout) ||
++                (CHILD_INFO_TABLE[i].senv->max_free_processors > 0 && CHILD_INFO_TABLE[i].status == CHILD_STATUS_READY &&
++                 idle_processors(i) > CHILD_INFO_TABLE[i].senv->max_free_processors))
++               )
++              || (CHILD_INFO_TABLE[i].type == CHILD_TYPE_MULTIPLEXER &&
++                  (multiplexer_idle_timeout > 0 && ap_scoreboard_image->servers[i][0].status == SERVER_READY &&
++                   apr_time_sec(now - ap_scoreboard_image->servers[i][0].last_used) > multiplexer_idle_timeout) &&
++                  total_processors(i) > CHILD_INFO_TABLE[i].senv->min_processors
++                  )
++            )
+       {
+         CHILD_INFO_TABLE[i].pid = 0;
+         CHILD_INFO_TABLE[i].status = CHILD_STATUS_STANDBY;
+ 
+-        if(CHILD_INFO_TABLE[i].type == CHILD_TYPE_WORKER)
++        if(CHILD_INFO_TABLE[i].type == CHILD_TYPE_WORKER || CHILD_INFO_TABLE[i].type == CHILD_TYPE_MULTIPLEXER)
+         {
+           /* completely free up this slot */
+ 
+@@ -2173,7 +2388,6 @@
+         return 1;
+     }
+ 
+-#if 0
+ #if APR_USE_SYSVSEM_SERIALIZE
+     if (ap_accept_lock_mech == APR_LOCK_DEFAULT || 
+         ap_accept_lock_mech == APR_LOCK_SYSVSEM) {
+@@ -2189,7 +2403,6 @@
+             return 1;
+         }
+     }
+-#endif
+ 
+     if (!is_graceful) {
+         if (ap_run_pre_mpm(s->process->pool, SB_SHARED) != OK) {
+@@ -2598,7 +2811,10 @@
+     ap_listen_pre_config();
+     ap_min_processors = DEFAULT_MIN_PROCESSORS;
+     ap_min_free_processors = DEFAULT_MIN_FREE_PROCESSORS;
++    ap_max_free_processors = DEFAULT_MAX_FREE_PROCESSORS;
+     ap_max_processors = DEFAULT_MAX_PROCESSORS;
++    ap_min_multiplexers = DEFAULT_MIN_MULTIPLEXERS;
++    ap_max_multiplexers = DEFAULT_MAX_MULTIPLEXERS;
+     ap_daemons_limit = server_limit;
+     ap_pid_fname = DEFAULT_PIDLOG;
+     ap_lock_fname = DEFAULT_LOCKFILE;
+@@ -2608,6 +2824,13 @@
+ 	ap_max_mem_free = APR_ALLOCATOR_MAX_FREE_UNLIMITED;
+ #endif
+ 
++    expire_timeout = DEFAULT_EXPIRE_TIMEOUT;
++    idle_timeout = DEFAULT_IDLE_TIMEOUT;
++    multiplexer_idle_timeout = DEFAULT_MULTIPLEXER_IDLE_TIMEOUT;
++    processor_wait_timeout = DEFAULT_PROCESSOR_WAIT_TIMEOUT;
++    processor_wait_steps = DEFAULT_PROCESSOR_WAIT_STEPS;
++
++
+     apr_cpystrn(ap_coredump_dir, ap_server_root, sizeof(ap_coredump_dir));
+ 
+     /* we need to know ServerLimit and ThreadLimit before we start processing
+@@ -2709,11 +2932,13 @@
+         server_env_image->control = (server_env_control*)shmem;
+         shmem += sizeof(server_env_control*);
+         server_env_image->table = (server_env_t*)shmem;
++    }
+ 
++    if(restart_num <= 2) {
++        _DBG("Cleaning server environments table");
++    
+         server_env_image->control->num = 0;
+-
+-        for (i = 0; i < tmp_server_limit; i++)
+-        {
++        for (i = 0; i < tmp_server_limit; i++) {
+             SENV[i].processor_id = -1;
+             SENV[i].uid          = -1;
+             SENV[i].gid          = -1;
+@@ -2781,8 +3006,8 @@
+                 if (pass_request(r, processor) == -1)
+                 {
+                     ap_log_error(APLOG_MARK, APLOG_ERR, 0,
+-                             ap_server_conf, "Could not pass request to proper "                             "child, request will not be honoured.");
+-                    return DECLINED;
++                                 ap_server_conf, "Could not pass request to processor %s (virtualhost %s), request will not be honoured.",
++                                 processor->senv->name, r->hostname);
+                 }
+                 _DBG("doing longjmp",0);
+                 longjmp(CHILD_INFO_TABLE[my_child_num].jmpbuffer, 1);
+@@ -2859,32 +3084,37 @@
+     ap_rputs("<hr>\n", r);
+     ap_rputs("<h2>peruser status</h2>\n", r);
+     ap_rputs("<table border=\"0\">\n", r);
+-    ap_rputs("<tr><td>ID</td><td>PID</td><td>STATUS</td><td>TYPE</td><td>UID</td>"
+-                   "<td>GID</td><td>CHROOT</td><td>INPUT</td>"
++    ap_rputs("<tr><td>ID</td><td>PID</td><td>STATUS</td><td>SB STATUS</td><td>TYPE</td><td>UID</td>"
++                   "<td>GID</td><td>CHROOT</td><td>NICE</td><td>INPUT</td>"
+                    "<td>OUTPUT</td><td>SOCK_FD</td>"
+                    "<td>TOTAL PROCESSORS</td><td>MAX PROCESSORS</td>"
+-                   "<td>IDLE PROCESSORS</td><td>MIN FREE PROCESSORS</td></tr>\n", r);
++                   "<td>IDLE PROCESSORS</td><td>MIN FREE PROCESSORS</td>"
++                   "<td>AVAIL</td>"
++                   "</tr>\n", r);
+     for (x = 0; x < NUM_CHILDS; x++)
+         {
+         senv = CHILD_INFO_TABLE[x].senv;
+-        ap_rprintf(r, "<tr><td>%3d</td><td>%5d</td><td>%8s</td><td>%12s</td>"
+-                       "<td>%4d</td><td>%4d</td><td>%25s</td><td>%5d</td>"
++        ap_rprintf(r, "<tr><td>%3d</td><td>%5d</td><td>%8s</td><td>%8s</td><td>%12s</td>"
++                       "<td>%4d</td><td>%4d</td><td>%25s</td><td>%3d</td><td>%5d</td>"
+                        "<td>%6d</td><td>%7d</td><td>%d</td><td>%d</td>"
+-                       "<td>%d</td><td>%d</td></tr>\n", 
++                       "<td>%d</td><td>%d</td><td>%3d</td></tr>\n",
+                        CHILD_INFO_TABLE[x].id, 
+                        CHILD_INFO_TABLE[x].pid, 
+                        child_status_string(CHILD_INFO_TABLE[x].status), 
++                       scoreboard_status_string(SCOREBOARD_STATUS(x)),
+                        child_type_string(CHILD_INFO_TABLE[x].type), 
+                        senv == NULL ? -1 : senv->uid, 
+                        senv == NULL ? -1 : senv->gid, 
+                        senv == NULL ? NULL : senv->chroot, 
++                       senv == NULL ? 0 : senv->nice_lvl,
+                        senv == NULL ? -1 : CHILD_INFO_TABLE[x].senv->input, 
+                        senv == NULL ? -1 : CHILD_INFO_TABLE[x].senv->output, 
+                        CHILD_INFO_TABLE[x].sock_fd,
+                        total_processors(x), 
+                        senv == NULL ? -1 : CHILD_INFO_TABLE[x].senv->max_processors,
+                        idle_processors(x),
+-                       senv == NULL ? -1 : CHILD_INFO_TABLE[x].senv->min_free_processors
++                       senv == NULL ? -1 : CHILD_INFO_TABLE[x].senv->min_free_processors,
++                       senv == NULL ? -1 : CHILD_INFO_TABLE[x].senv->availability
+                        );
+        }
+     ap_rputs("</table>\n", r);
+@@ -2938,50 +3168,183 @@
+     APR_OPTIONAL_HOOK(ap, status_hook, peruser_status_hook, NULL, NULL, APR_HOOK_MIDDLE);
+ }
+ 
+-/* we define an Processor w/ specific uid/gid */
+-static const char *cf_Processor(cmd_parms *cmd, void *dummy,
+-    const char *user_name, const char *group_name, const char *chroot)
++static const char *cf_Processor(cmd_parms *cmd, void *dummy, const char *arg)
+ {
+-    uid_t uid = ap_uname2id(user_name);
+-    gid_t gid = ap_gname2id(group_name);
++    const char *user_name = NULL, *group_name = NULL, *directive;
++    server_env_t senv;
++    ap_directive_t *current;
++
++    const char *endp = ap_strrchr_c(arg, '>');
++
++    if (endp == NULL) {
++	return apr_psprintf(cmd->temp_pool,
++			    "Error: Directive %s> missing closing '>'", cmd->cmd->name);
++    }
++
++    arg = apr_pstrndup(cmd->pool, arg, endp - arg);
++
++    if (!arg) {
++   	return apr_psprintf(cmd->temp_pool,
++                            "Error: %s> must specify a processor name", cmd->cmd->name);
++    }
++
++    senv.name = ap_getword_conf(cmd->pool, &arg);
++    _DBG("processor_name: %s", senv.name);
++
++    if (strlen(senv.name) == 0) {
++        return apr_psprintf(cmd->temp_pool,
++                            "Error: Directive %s> takes one argument", cmd->cmd->name);
++    }
++
++    /*	Check for existing processors on first launch and between gracefuls */
++    if (restart_num == 1 || is_graceful) {
++        server_env_t *old_senv = find_senv_by_name(senv.name);
++
++        if (old_senv) {
++            return apr_psprintf(cmd->temp_pool,
++                                "Error: Processor %s already defined", senv.name);
++        }
++    }
++
++    senv.nice_lvl 		= 0;
++    senv.chroot 		= NULL;
++    senv.cgroup			= NULL;
++    senv.min_processors 	= ap_min_processors;
++    senv.min_free_processors 	= ap_min_free_processors;
++    senv.max_free_processors    = ap_max_free_processors;
++    senv.max_processors 	= ap_max_processors;
++
++    current = cmd->directive->first_child;
++
++    int proc_temp = 0;
++    for(; current != NULL; current = current->next) {
++        directive = current->directive;
++        
++        if (!strcasecmp(directive, "user")) {
++            user_name = current->args;
++        }
++        else if (!strcasecmp(directive, "group")) {
++   	    group_name = current->args;
++        }
++        else if (!strcasecmp(directive, "chroot")) {
++            senv.chroot = ap_getword_conf(cmd->pool, &current->args);
++        }
++        else if (!strcasecmp(directive, "nicelevel")) {
++    	    senv.nice_lvl = atoi(current->args);
++        }
++        else if (!strcasecmp(directive, "maxprocessors")) {
++            proc_temp = atoi(current->args);
++
++            if (proc_temp < 1) {
++                ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
++                             "WARNING: Require MaxProcessors > 0, setting to 1");
++                proc_temp = 1;
++            }
++
++            senv.max_processors = proc_temp;
++        }
++        else if (!strcasecmp(directive, "minprocessors")) {
++            proc_temp = atoi(current->args);
++
++            if (proc_temp < 0) {
++                ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
++                             "WARNING: Require MinProcessors >= 0, setting to 0");
++                proc_temp = 0;
++            }
++
++            senv.min_processors = proc_temp;
++        }
++        else if (!strcasecmp(directive, "minspareprocessors")) {
++            proc_temp = atoi(current->args);
+ 
+-    _DBG("user=%s:%d group=%s:%d chroot=%s",
+-        user_name, uid, group_name, gid, chroot);
++            if (proc_temp < 0) {
++                ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
++                             "WARNING: Require MinSpareProcessors >= 0, setting to 0");
++                proc_temp = 0;
++            }
++
++            senv.min_free_processors = proc_temp;
++        }
++        else if (!strcasecmp(directive, "maxspareprocessors")) {
++            proc_temp = atoi(current->args);
++            
++            if (proc_temp < 0) {
++                ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
++                             "WARNING: Require MaxSpareProcessors >= 0, setting to 0");
++                proc_temp = 0;
++            }
++
++            senv.max_free_processors = proc_temp;
++        }
++        else if (!strcasecmp(directive, "cgroup")) {
++            senv.cgroup = ap_getword_conf(cmd->pool, &current->args);
++        }
++        else {
++            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
++                         "Unknown directive %s in %s>", directive, cmd->cmd->name);
++        }
++    }
++
++    if (user_name == NULL || group_name == NULL) {
++        return apr_psprintf(cmd->temp_pool,
++                            "Error: User or Group must be set in %s>", cmd->cmd->name);
++    }
++
++    senv.uid = ap_uname2id(user_name);
++    senv.gid = ap_gname2id(group_name);
++
++    _DBG("name=%s user=%s:%d group=%s:%d chroot=%s nice_lvl=%d",
++         senv.name, user_name, senv.uid, group_name, senv.gid, senv.chroot, senv.nice_lvl);
++
++    _DBG("min_processors=%d min_free_processors=%d max_spare_processors=%d max_processors=%d",
++         senv.min_processors, senv.min_free_processors, senv.max_free_processors, senv.max_processors);
+ 
+     return child_add(CHILD_TYPE_PROCESSOR, CHILD_STATUS_STANDBY,
+-                     cmd->pool, uid, gid, chroot);
++                     cmd->pool, &senv);
+ }
+ 
+ /* we define an Multiplexer child w/ specific uid/gid */
+ static const char *cf_Multiplexer(cmd_parms *cmd, void *dummy,
+     const char *user_name, const char *group_name, const char *chroot)
+ {
+-    uid_t uid = ap_uname2id(user_name);
+-    gid_t gid = ap_gname2id(group_name);
++    server_env_t senv;
++
++    senv.name 		= NULL;
++
++    senv.uid 		= ap_uname2id(user_name);
++    senv.gid 		= ap_gname2id(group_name);
++    senv.nice_lvl 	= 0;
++    senv.cgroup		= NULL;
++    senv.chroot         = chroot;
++
++    senv.min_processors 	= ap_min_multiplexers;
++    senv.min_free_processors 	= ap_min_free_processors;
++    senv.max_free_processors    = ap_max_free_processors;
++    senv.max_processors 	= ap_max_multiplexers;
+ 
+     _DBG("user=%s:%d group=%s:%d chroot=%s [multiplexer id %d]",
+-        user_name, uid, group_name, gid, chroot, NUM_CHILDS);
++        user_name, senv.uid, group_name, senv.gid, senv.chroot, NUM_CHILDS);
+ 
+     return child_add(CHILD_TYPE_MULTIPLEXER, CHILD_STATUS_STARTING,
+-                     cmd->pool, uid, gid, chroot);
++                     cmd->pool, &senv);
+ }
+ 
+ static const char* cf_ServerEnvironment(cmd_parms *cmd, void *dummy,
+-    const char *user_name, const char *group_name, const char *chroot)
++    const char *name)
+ {
+-    int uid = ap_uname2id(user_name);
+-    int gid = ap_gname2id(group_name);
+     peruser_server_conf *sconf = PERUSER_SERVER_CONF(cmd->server->module_config);
+ 
+     _DBG("function entered", 0);
+ 
+-       if (chroot && !ap_is_directory(cmd->pool, chroot))
+-               return apr_psprintf(cmd->pool, "Error: chroot directory [%s] does not exist", chroot);
++    sconf->senv = find_senv_by_name(name);
+ 
+-    sconf->senv = senv_add(uid, gid, chroot);
++    if (sconf->senv == NULL) {
++        return apr_psprintf(cmd->pool,
++                            "Error: Processor %s not defined", name);
++    }
+ 
+-    _DBG("user=%s:%d group=%s:%d chroot=%s numchilds=%d",
+-        user_name, uid, group_name, gid, chroot, NUM_CHILDS);
++    _DBG("user=%d group=%d chroot=%s numchilds=%d",
++        sconf->senv->uid, sconf->senv->gid, sconf->senv->chroot, NUM_CHILDS);
+ 
+     return NULL;
+ }
+@@ -3046,10 +3409,10 @@
+ 
+     min_procs = atoi(arg);
+ 
+-    if (min_procs < 1) {
++    if (min_procs < 0) {
+         ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
+-                     "WARNING: Require MaxProcessors > 0, setting to 1");
+-        min_procs = 1;
++                     "WARNING: Require MinProcessors >= 0, setting to 0");
++        min_procs = 0;
+     }
+ 
+     if (ap_check_cmd_context(cmd, NOT_IN_VIRTUALHOST) != NULL) {
+@@ -3075,10 +3438,10 @@
+ 
+     min_free_procs = atoi(arg);
+ 
+-    if (min_free_procs < 1) {
++    if (min_free_procs < 0) {
+         ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
+-                     "WARNING: Require MinSpareProcessors > 0, setting to 1");
+-        min_free_procs = 1;
++                     "WARNING: Require MinSpareProcessors >= 0, setting to 0");
++        min_free_procs = 0;
+     }
+ 
+     if (ap_check_cmd_context(cmd, NOT_IN_VIRTUALHOST) != NULL) {
+@@ -3092,6 +3455,35 @@
+     return NULL;
+ }
+ 
++static const char *set_max_free_processors (cmd_parms *cmd, void *dummy, const char *arg)
++{
++     peruser_server_conf *sconf;
++     int max_free_procs;
++     const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_LOC_FILE|NOT_IN_LIMIT);
++
++     if (err != NULL) {
++         return err;
++     }
++
++     max_free_procs = atoi(arg);
++
++     if (max_free_procs < 0) {
++         ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
++                      "WARNING: Require MaxSpareProcessors >= 0, setting to 0");
++         max_free_procs = 0;
++     }
++
++     if (ap_check_cmd_context(cmd, NOT_IN_VIRTUALHOST) != NULL) {
++         sconf = PERUSER_SERVER_CONF(cmd->server->module_config);
++         sconf->senv->max_free_processors = max_free_procs;
++     }
++     else {
++         ap_max_free_processors = max_free_procs;
++     }
++
++     return NULL;
++}
++
+ static const char *set_max_processors (cmd_parms *cmd, void *dummy, const char *arg)
+ {
+     peruser_server_conf *sconf;
+@@ -3121,6 +3513,50 @@
+     return NULL;
+ }
+ 
++static const char *set_min_multiplexers (cmd_parms *cmd, void *dummy, const char *arg)
++{
++    int min_multiplexers;
++    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_LOC_FILE|NOT_IN_LIMIT);
++
++    if (err != NULL) {
++        return err;
++    }
++
++    min_multiplexers = atoi(arg);
++
++    if (min_multiplexers < 1) {
++        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
++                     "WARNING: Require MinMultiplexers > 0, setting to 1");
++        min_multiplexers = 1;
++    }
++
++    ap_min_multiplexers = min_multiplexers;
++
++    return NULL;
++}
++
++static const char *set_max_multiplexers (cmd_parms *cmd, void *dummy, const char *arg)
++{
++    int max_multiplexers;
++    const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_LOC_FILE|NOT_IN_LIMIT);
++
++    if (err != NULL) {
++        return err;
++    }
++
++    max_multiplexers = atoi(arg);
++
++    if (max_multiplexers < 1) {
++        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
++                     "WARNING: Require MaxMultiplexers > 0, setting to 1");
++        max_multiplexers = 1;
++    }
++
++    ap_max_multiplexers = max_multiplexers;
++
++    return NULL;
++}
++
+ static const char *set_server_limit (cmd_parms *cmd, void *dummy, const char *arg) 
+ {
+     int tmp_server_limit;
+@@ -3183,6 +3619,42 @@
+     return NULL;
+ }
+ 
++static const char *set_multiplexer_idle_timeout (cmd_parms *cmd, void *dummy, const char *arg) {
++    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
++
++    if (err != NULL) {
++        return err;
++    }
++
++    multiplexer_idle_timeout = atoi(arg);
++
++    return NULL;
++}
++
++static const char *set_processor_wait_timeout (cmd_parms *cmd, void *dummy, const char *timeout, const char *steps) {
++    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
++    
++    if (err != NULL) {
++        return err;
++    }
++
++    processor_wait_timeout = atoi(timeout);
++
++    if (steps != NULL) {
++        int steps_tmp = atoi(steps);
++
++        if (steps_tmp < 1) {
++            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
++                         "WARNING: Require ProcessorWaitTimeout steps > 0, setting to 1");
++            steps_tmp = 1;
++        }
++
++        processor_wait_steps = steps_tmp;
++    }
++
++    return NULL;
++}
++
+ static const command_rec peruser_cmds[] = {
+ UNIX_DAEMON_COMMANDS,
+ LISTEN_COMMANDS,
+@@ -3190,23 +3662,33 @@
+               "Minimum number of idle children, to handle request spikes"),
+ AP_INIT_TAKE1("MinSpareServers", set_min_free_servers, NULL, RSRC_CONF,
+               "Minimum number of idle children, to handle request spikes"),
++AP_INIT_TAKE1("MaxSpareProcessors", set_max_free_processors, NULL, RSRC_CONF,
++              "Maximum number of idle children, 0 to disable"),
+ AP_INIT_TAKE1("MaxClients", set_max_clients, NULL, RSRC_CONF,
+               "Maximum number of children alive at the same time"),
+ AP_INIT_TAKE1("MinProcessors", set_min_processors, NULL, RSRC_CONF,
+               "Minimum number of processors per vhost"),
+ AP_INIT_TAKE1("MaxProcessors", set_max_processors, NULL, RSRC_CONF,
+               "Maximum number of processors per vhost"),
++AP_INIT_TAKE1("MinMultiplexers", set_min_multiplexers, NULL, RSRC_CONF,
++              "Minimum number of multiplexers the server can have"),
++AP_INIT_TAKE1("MaxMultiplexers", set_max_multiplexers, NULL, RSRC_CONF,
++              "Maximum number of multiplexers the server can have"),
+ AP_INIT_TAKE1("ServerLimit", set_server_limit, NULL, RSRC_CONF,
+               "Maximum value of MaxClients for this run of Apache"),
+ AP_INIT_TAKE1("ExpireTimeout", set_expire_timeout, NULL, RSRC_CONF,
+-              "Maximum idle time before a child is killed, 0 to disable"),
++              "Maximum time a child can live, 0 to disable"),
+ AP_INIT_TAKE1("IdleTimeout", set_idle_timeout, NULL, RSRC_CONF,
+               "Maximum time before a child is killed after being idle, 0 to disable"),
++AP_INIT_TAKE1("MultiplexerIdleTimeout", set_multiplexer_idle_timeout, NULL, RSRC_CONF,
++              "Maximum time before a multiplexer is killed after being idle, 0 to disable"),
++AP_INIT_TAKE12("ProcessorWaitTimeout", set_processor_wait_timeout, NULL, RSRC_CONF,
++              "Maximum time a multiplexer waits for the processor if it is busy"),
+ AP_INIT_TAKE23("Multiplexer", cf_Multiplexer, NULL, RSRC_CONF,
+               "Specify an Multiplexer Child configuration."),
+-AP_INIT_TAKE23("Processor", cf_Processor, NULL, RSRC_CONF,
+-              "Specify a User and Group for a specific child process."),
+-AP_INIT_TAKE23("ServerEnvironment", cf_ServerEnvironment, NULL, RSRC_CONF,
++AP_INIT_RAW_ARGS("<Processor", cf_Processor, NULL, RSRC_CONF,
++              "Specify settings for processor."),
++AP_INIT_TAKE1("ServerEnvironment", cf_ServerEnvironment, NULL, RSRC_CONF,
+               "Specify the server environment for this virtual host."),
+ { NULL }
+ };