The patch titled
Subject: exit: release_task: fix the comment about group leader accounting
has been removed from the -mm tree. Its filename was
exit-release_task-fix-the-comment-about-group-leader-accounting.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Subject: exit: release_task: fix the comment about group leader accounting
Contrary to what the comment in __exit_signal() says we do account the
group leader. Fix this and explain why.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Aaron Tomlin <atomlin@xxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Sterling Alexander <stalexan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/exit.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff -puN kernel/exit.c~exit-release_task-fix-the-comment-about-group-leader-accounting kernel/exit.c
--- a/kernel/exit.c~exit-release_task-fix-the-comment-about-group-leader-accounting
+++ a/kernel/exit.c
@@ -118,13 +118,10 @@ static void __exit_signal(struct task_st
}
/*
- * Accumulate here the counters for all threads but the group leader
- * as they die, so they can be added into the process-wide totals
- * when those are taken. The group leader stays around as a zombie as
- * long as there are other threads. When it gets reaped, the exit.c
- * code will add its counts into these totals. We won't ever get here
- * for the group leader, since it will have been the last reference on
- * the signal_struct.
+ * Accumulate here the counters for all threads as they die. We could
+ * skip the group leader because it is the last user of signal_struct,
+ * but we want to avoid the race with thread_group_cputime() which can
+ * see the empty ->thread_head list.
*/
task_cputime(tsk, &utime, &stime);
write_seqlock(&sig->stats_lock);
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
origin.patch
mmfs-introduce-helpers-around-the-i_mmap_mutex.patch
mm-use-new-helper-functions-around-the-i_mmap_mutex.patch
mm-convert-i_mmap_mutex-to-rwsem.patch
mm-rmap-share-the-i_mmap_rwsem.patch
uprobes-share-the-i_mmap_rwsem.patch
mm-xip-share-the-i_mmap_rwsem.patch
mm-memory-failure-share-the-i_mmap_rwsem.patch
mm-nommu-share-the-i_mmap_rwsem.patch
mm-memoryc-share-the-i_mmap_rwsem.patch
remove-unnecessary-is_valid_nodemask.patch
oom-dont-assume-that-a-coredumping-thread-will-exit-soon.patch
oom-dont-assume-that-a-coredumping-thread-will-exit-soon-v2.patch
oom-dont-assume-that-a-coredumping-thread-will-exit-soon-v2-fix.patch
oom-kill-the-insufficient-and-no-longer-needed-pt_trace_exit-check.patch
linux-next.patch
all-arches-signal-move-restart_block-to-struct-task_struct.patch
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