Messages in this thread | | | Date | Fri, 25 Mar 2011 00:10:48 +0900 | From | Minchan Kim <> | Subject | Re: [PATCH 5/5] x86,mm: make pagefault killable |
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On Tue, Mar 22, 2011 at 08:09:29PM +0900, KOSAKI Motohiro wrote: > When oom killer occured, almost processes are getting stuck following > two points. > > 1) __alloc_pages_nodemask > 2) __lock_page_or_retry > > 1) is not much problematic because TIF_MEMDIE lead to make allocation > failure and get out from page allocator. 2) is more problematic. When > OOM situation, Zones typically don't have page cache at all and Memory > starvation might lead to reduce IO performance largely. When fork bomb > occur, TIF_MEMDIE task don't die quickly mean fork bomb may create > new process quickly rather than oom-killer kill it. Then, the system > may become livelock. > > This patch makes pagefault interruptible by SIGKILL. > > Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Looks like a cool idea.
-- Kind regards, Minchan Kim
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