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authorOleg Nesterov <oleg@redhat.com>2014-12-12 16:56:27 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-13 12:42:49 -0800
commit6a2d5679b4a852a3bf80c570644456ab466ab714 (patch)
treeec4d85627deeffe0452197d2cf9c372fa586bca8
parentd003f371b27016354c392464819530d47a915765 (diff)
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oom: kill the insufficient and no longer needed PT_TRACE_EXIT check
After the previous patch we can remove the PT_TRACE_EXIT check in oom_scan_process_thread(), it was added to handle the case when the coredumping was "frozen" by ptrace, but it doesn't really work. If nothing else, we would need to check all threads which could share the same ->mm to make it more or less correct. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Cong Wang <xiyou.wangcong@gmail.com> Cc: David Rientjes <rientjes@google.com> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/oom_kill.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index f694ef0d9f9a..d503e9ce1c7b 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -281,14 +281,9 @@ enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
if (oom_task_origin(task))
return OOM_SCAN_SELECT;
- if (task_will_free_mem(task) && !force_kill) {
- /*
- * If this task is not being ptraced on exit, then wait for it
- * to finish before killing some other task unnecessarily.
- */
- if (!(task->group_leader->ptrace & PT_TRACE_EXIT))
- return OOM_SCAN_ABORT;
- }
+ if (task_will_free_mem(task) && !force_kill)
+ return OOM_SCAN_ABORT;
+
return OOM_SCAN_OK;
}