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authorDavid Rientjes <rientjes@google.com>2012-06-08 13:21:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-06-08 15:07:35 -0700
commit1e11ad8dc42975d5c2bab7d478f6cd875602eda4 (patch)
tree62e755edfd19ac45cc11b50311ad802907485ff7 /Makefile
parent72494504498ff5ac2f086a83473d4dd1ca490bd3 (diff)
downloadlinux-stericsson-1e11ad8dc42975d5c2bab7d478f6cd875602eda4.tar.gz
mm, oom: fix badness score underflow
If the privileges given to root threads (3% of allowable memory) or a negative value of /proc/pid/oom_score_adj happen to exceed the amount of rss of a thread, its badness score overflows as a result of commit a7f638f999ff ("mm, oom: normalize oom scores to oom_score_adj scale only for userspace"). Fix this by making the type signed and return 1, meaning the thread is still eligible for kill, if the value is negative. Reported-by: Dave Jones <davej@redhat.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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