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@xxxxxxxxxx> Reported-by: Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> --- 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); } -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>