On Tue, 29 Mar 2011 19:42:10 +0900 (JST) KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>