3830 SIGQUEUE_MAX's limit of 32 is too low
Reviewed by: Cedric Blancher <cedric.blancher@gmail.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Irek Szczesniak <iszczesniak@gmail.com>

*** 21,39 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <sys/types.h>
  #include <sys/cmn_err.h>
  #include <sys/sysmacros.h>
  #include <sys/proc.h>
  #include <sys/rctl.h>
  #include <sys/rctl_impl.h>
  #include <sys/port_kernel.h>
  
  #include <sys/vmparam.h>
  #include <sys/machparam.h>
  
  /*
--- 21,39 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #include <sys/types.h>
  #include <sys/cmn_err.h>
  #include <sys/sysmacros.h>
  #include <sys/proc.h>
  #include <sys/rctl.h>
  #include <sys/rctl_impl.h>
  #include <sys/port_kernel.h>
+ #include <sys/signal.h>
+ #include <sys/var.h>
  
  #include <sys/vmparam.h>
  #include <sys/machparam.h>
  
  /*
*** 63,72 ****
--- 63,73 ----
  rctl_hndl_t rc_process_msgmnb;
  rctl_hndl_t rc_process_msgtql;
  rctl_hndl_t rc_process_semmsl;
  rctl_hndl_t rc_process_semopm;
  rctl_hndl_t rc_process_portev;
+ rctl_hndl_t rc_process_sigqueue;
  
  /*
   * process.max-cpu-time / RLIMIT_CPU
   */
  /*ARGSUSED*/
*** 286,296 ****
   *   Register the various resource controls associated with process entities.
   *   The historical rlim_infinity_map and rlim_infinity32_map are now encoded
   *   here as the native and ILP32 infinite values for each resource control.
   */
  void
! rctlproc_init()
  {
          rctl_set_t *set;
          rctl_alloc_gp_t *gp;
          rctl_entity_p_t e;
  
--- 287,297 ----
   *   Register the various resource controls associated with process entities.
   *   The historical rlim_infinity_map and rlim_infinity32_map are now encoded
   *   here as the native and ILP32 infinite values for each resource control.
   */
  void
! rctlproc_init(void)
  {
          rctl_set_t *set;
          rctl_alloc_gp_t *gp;
          rctl_entity_p_t e;
  
*** 367,376 ****
--- 368,391 ----
              PORT_MAX_EVENTS, PORT_MAX_EVENTS, &rctl_absolute_ops);
          rctl_add_default_limit("process.max-port-events", PORT_DEFAULT_EVENTS,
              RCPRIV_PRIVILEGED, RCTL_LOCAL_DENY);
  
          /*
+          * We set the upper limit to the maximum number of processes per user
+          * to make it theoretical possible to deliver all SIGCHILD signals on
+          * child termination, but at least to 8k.
+          */
+         rc_process_sigqueue = rctl_register("process.max-sigqueue-size",
+             RCENTITY_PROCESS, RCTL_GLOBAL_LOWERABLE | RCTL_GLOBAL_DENY_ALWAYS |
+             RCTL_GLOBAL_COUNT, MAX(v.v_maxup, 8192), MAX(v.v_maxup, 8192),
+             &rctl_absolute_ops);
+         rctl_add_default_limit("process.max-sigqueue-size",
+             _SIGQUEUE_SIZE_BASIC, RCPRIV_BASIC, RCTL_LOCAL_DENY);
+         rctl_add_default_limit("process.max-sigqueue-size",
+             _SIGQUEUE_SIZE_PRIVILEGED, RCPRIV_PRIVILEGED, RCTL_LOCAL_DENY);
+ 
+         /*
           * Place minimal set of controls on "sched" process for inheritance by
           * processes created via newproc().
           */
          set = rctl_set_create();
          gp = rctl_set_init_prealloc(RCENTITY_PROCESS);