D33810.diff
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	diff --git a/sys/vm/vm_pageout.c b/sys/vm/vm_pageout.c
	--- a/sys/vm/vm_pageout.c
	+++ b/sys/vm/vm_pageout.c
	@@ -1902,6 +1902,7 @@
	void
	vm_pageout_oom(int shortage)
	{
	+ const char *reason;
	struct proc p, bigproc;
	vm_offset_t size, bigsize;
	struct thread *td;
	@@ -2014,11 +2015,25 @@
	}
	}
	sx_sunlock(&allproc_lock);
	+
	if (bigproc != NULL) {
	+ switch (shortage) {
	+ case VM_OOM_MEM:
	+ reason = "failed to reclaim memory";
	+ break;
	+ case VM_OOM_MEM_PF:
	+ reason = "a thread waited too long to allocate a page";
	+ break;
	+ case VM_OOM_SWAPZ:
	+ reason = "out of swap space";
	+ break;
	+ default:
	+ panic("unknown OOM reason %d", shortage);
	+ }
	if (vm_panic_on_oom != 0 && --vm_panic_on_oom == 0)
	- panic("out of swap space");
	+ panic("%s", reason);
	PROC_LOCK(bigproc);
	- killproc(bigproc, "out of swap space");
	+ killproc(bigproc, reason);
	sched_nice(bigproc, PRIO_MIN);
	_PRELE(bigproc);
	PROC_UNLOCK(bigproc);