mm, oom: avoid looping when chosen thread detaches its mm
oom_kill_task() returns non-zero iff the chosen process does not have any threads with an attached ->mm. In such a case, it's better to just return to the page allocator and retry the allocation because memory could have been freed in the interim and the oom condition may no longer exist. It's unnecessary to loop in the oom killer and find another thread to kill. This allows both oom_kill_task() and oom_kill_process() to be converted to void functions. If the oom condition persists, the oom killer will be recalled. Acked-by:KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by:
David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by:
Michal Hocko <mhocko@suse.cz> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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