Commit f2a2a710 authored Dec 06, 2006 by Nick Piggin Committed by Linus Torvalds Dec 07, 2006

[PATCH] oom: less memdie



Don't cause all threads in all other thread groups to gain TIF_MEMDIE
otherwise we'll get a thundering herd eating our memory reserve.  This may not
be the optimal scheme, but it fits our policy of allowing just one TIF_MEMDIE
in the system at once.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent f3af38d3

mm/oom_kill.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -323,11 +323,12 @@ static int oom_kill_task(struct task_struct *p)

		/*
		* kill all processes that share the ->mm (i.e. all threads),
		* but are in a different thread group.
		* but are in a different thread group. Don't let them have access
		* to memory reserves though, otherwise we might deplete all memory.
		*/
		do_each_thread(g, q) {
		if (q->mm == mm && q->tgid != p->tgid)
		__oom_kill_task(q, 1);
		force_sig(SIGKILL, p);
		} while_each_thread(g, q);

		return 0;