lkml.org 
[lkml]   [2012]   [Apr]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH] mm: sync rss-counters at the end of exit_mm()
From
Date
On task's exit do_exit() calls sync_mm_rss() but this is not enough,
there can be page-faults after this point, for example exit_mm() ->
mm_release() -> put_user() (for processing tsk->clear_child_tid).
Thus there may be some rss-counters delta in current->rss_stat.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
---
kernel/exit.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/exit.c b/kernel/exit.c
index d8bd3b42..8e09dbe 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -683,6 +683,7 @@ static void exit_mm(struct task_struct * tsk)
enter_lazy_tlb(mm, current);
task_unlock(tsk);
mm_update_next_owner(mm);
+ sync_mm_rss(mm);
mmput(mm);
}



\
 
 \ /
  Last update: 2012-04-09 22:05    [from the cache]
©2003-2011 Jasper Spaans