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| author | Rik van Riel <riel@redhat.com> | 2009-07-29 15:02:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-07-29 19:10:34 -0700 |
| commit | 933b787b57ca8bdc0fc8fb2cbf67b5e6d21beb84 (patch) | |
| tree | aae84533e71c7574ab8dd6f0ca4b782de121e482 /kernel/fork.c | |
| parent | 6583bb64fc370842b32a87c67750c26f6d559af0 (diff) | |
| download | linux-933b787b57ca8bdc0fc8fb2cbf67b5e6d21beb84.tar.gz linux-933b787b57ca8bdc0fc8fb2cbf67b5e6d21beb84.tar.bz2 linux-933b787b57ca8bdc0fc8fb2cbf67b5e6d21beb84.zip | |
mm: copy over oom_adj value at fork time
Fix a post-2.6.31 regression which was introduced by
2ff05b2b4eac2e63d345fc731ea151a060247f53 ("oom: move oom_adj value from
task_struct to mm_struct").
After moving the oom_adj value from the task struct to the mm_struct, the
oom_adj value was no longer properly inherited by child processes.
Copying over the oom_adj value at fork time fixes that bug.
[kosaki.motohiro@jp.fujitsu.com: test for current->mm before dereferencing it]
Signed-off-by: Rik van Riel <riel@redhat.com>
Reported-by: Paul Menage <manage@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 9b42695f0d14..29b532e718f7 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -426,6 +426,7 @@ static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p) init_rwsem(&mm->mmap_sem); INIT_LIST_HEAD(&mm->mmlist); mm->flags = (current->mm) ? current->mm->flags : default_dump_filter; + mm->oom_adj = (current->mm) ? current->mm->oom_adj : 0; mm->core_state = NULL; mm->nr_ptes = 0; set_mm_counter(mm, file_rss, 0); |