kthread_stop() uses task->vfork_done for synchronization. The exiting kthread shouldn't do complete_vfork_done() until it sets ->exit_code. fix for mm-correctly-synchronize-rss-counters-at-exit-exec.patch Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx> Cc: Oleg Nesterov <oleg@xxxxxxxxxx> --- kernel/exit.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/exit.c b/kernel/exit.c index eb12719..70875a6 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -960,6 +960,9 @@ void do_exit(long code) acct_update_integrals(tsk); + /* Set exit_code before complete_vfork_done() in mm_release() */ + tsk->exit_code = code; + /* Release mm and sync mm's RSS info before statistics gathering */ mm_release(tsk, tsk->mm); @@ -975,7 +978,6 @@ void do_exit(long code) tty_audit_exit(); audit_free(tsk); - tsk->exit_code = code; taskstats_exit(tsk, group_dead); exit_mm(tsk); -- 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>