diff options
| author | Hugh Dickins <hugh@veritas.com> | 2007-01-05 16:37:03 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2007-01-05 23:55:29 -0800 |
| commit | 7ba3485947ee7bc89a17f86250fe9b692a615dff (patch) | |
| tree | 77fce78136f040d9382f1b27687478bbcbec051a | |
| parent | c8af57eb76fbd70c7f5b421b065fd55d096e2bff (diff) | |
| download | lwn-7ba3485947ee7bc89a17f86250fe9b692a615dff.tar.gz lwn-7ba3485947ee7bc89a17f86250fe9b692a615dff.zip | |
[PATCH] fix OOM killing of swapoff
These days, if you swapoff when there isn't enough memory, OOM killer gives
"BUG: scheduling while atomic" and the machine hangs: badness() needs to do
its PF_SWAPOFF return after the task_unlock (tasklist_lock is also held
here, so p isn't going to be freed: PF_SWAPOFF might get turned off at any
moment, but that doesn't really matter).
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | mm/oom_kill.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 6969cfb33901..b278b8d60eee 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -61,12 +61,6 @@ unsigned long badness(struct task_struct *p, unsigned long uptime) } /* - * swapoff can easily use up all memory, so kill those first. - */ - if (p->flags & PF_SWAPOFF) - return ULONG_MAX; - - /* * The memory size of the process is the basis for the badness. */ points = mm->total_vm; @@ -77,6 +71,12 @@ unsigned long badness(struct task_struct *p, unsigned long uptime) task_unlock(p); /* + * swapoff can easily use up all memory, so kill those first. + */ + if (p->flags & PF_SWAPOFF) + return ULONG_MAX; + + /* * Processes which fork a lot of child processes are likely * a good choice. We add half the vmsize of the children if they * have an own mm. This prevents forking servers to flood the |