diff options
| -rw-r--r-- | sys/vm/vm_pageout.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/sys/vm/vm_pageout.c b/sys/vm/vm_pageout.c index 3154ce3..3cd1e54 100644 --- a/sys/vm/vm_pageout.c +++ b/sys/vm/vm_pageout.c @@ -1526,15 +1526,15 @@ vm_pageout_oom(int shortage) FOREACH_PROC_IN_SYSTEM(p) { int breakout; - if (PROC_TRYLOCK(p) == 0) - continue; + PROC_LOCK(p); + /* * If this is a system, protected or killed process, skip it. */ - if (p->p_state != PRS_NORMAL || - (p->p_flag & (P_INEXEC | P_PROTECTED | P_SYSTEM)) || - (p->p_pid == 1) || P_KILLED(p) || - ((p->p_pid < 48) && (swap_pager_avail != 0))) { + if (p->p_state != PRS_NORMAL || (p->p_flag & (P_INEXEC | + P_PROTECTED | P_SYSTEM | P_WEXIT)) != 0 || + p->p_pid == 1 || P_KILLED(p) || + (p->p_pid < 48 && swap_pager_avail != 0)) { PROC_UNLOCK(p); continue; } @@ -1567,11 +1567,14 @@ vm_pageout_oom(int shortage) PROC_UNLOCK(p); continue; } + _PHOLD(p); if (!vm_map_trylock_read(&vm->vm_map)) { - vmspace_free(vm); + _PRELE(p); PROC_UNLOCK(p); + vmspace_free(vm); continue; } + PROC_UNLOCK(p); size = vmspace_swap_count(vm); vm_map_unlock_read(&vm->vm_map); if (shortage == VM_OOM_MEM) @@ -1583,16 +1586,19 @@ vm_pageout_oom(int shortage) */ if (size > bigsize) { if (bigproc != NULL) - PROC_UNLOCK(bigproc); + PRELE(bigproc); bigproc = p; bigsize = size; - } else - PROC_UNLOCK(p); + } else { + PRELE(p); + } } sx_sunlock(&allproc_lock); if (bigproc != NULL) { + PROC_LOCK(bigproc); killproc(bigproc, "out of swap space"); sched_nice(bigproc, PRIO_MIN); + _PRELE(bigproc); PROC_UNLOCK(bigproc); wakeup(&cnt.v_free_count); } |
