The patch titled
fill_tgid: cleanup delays accounting
has been added to the -mm tree. Its filename is
fill_tgid-cleanup-delays-accounting.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: fill_tgid: cleanup delays accounting
From: Oleg Nesterov <oleg@xxxxxxxxxx>
fill_tgid() should skip not only an already exited group leader. If the
task has ->exit_state != 0 it already did exit_notify(), so it also did
fill_tgid_exit()->delayacct_add_tsk(->signal->stats) and we should skip it
to avoid a double accounting.
This patch doesn't close the race completely, but it cleanups the code.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Shailabh Nagar <nagar@xxxxxxxxxxxxxx>
Cc: Balbir Singh <balbir@xxxxxxxxxx>
Cc: Jay Lan <jlan@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/taskstats.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/taskstats.c~fill_tgid-cleanup-delays-accounting kernel/taskstats.c
--- a/kernel/taskstats.c~fill_tgid-cleanup-delays-accounting
+++ a/kernel/taskstats.c
@@ -235,7 +235,7 @@ static int fill_tgid(pid_t tgid, struct
tsk = first;
do {
- if (tsk->exit_state == EXIT_ZOMBIE && thread_group_leader(tsk))
+ if (tsk->exit_state)
continue;
/*
* Accounting subsystem can call its functions here to
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
fill_tgid-fix-task_struct-leak-and-possible-oops.patch
bacct_add_tsk-fix-unsafe-and-wrong-parent-group_leader-dereference.patch
taskstats_tgid_free-fix-usage.patch
taskstats_tgid_alloc-optimization.patch
taskstats-kill-taskstats_lock-in-favor-of-siglock.patch
taskstats-dont-use-tasklist_lock.patch
fill_tgid-cleanup-delays-accounting.patch
tty-signal-tty-locking.patch
do_task_stat-dont-take-tty_mutex.patch
do_acct_process-dont-take-tty_mutex.patch
trivial-make-set_special_pids-static.patch
sys_unshare-remove-a-broken-clone_sighand-code.patch
add-process_session-helper-routine-deprecate-old-field-tidy-2.patch
sys_setpgid-eliminate-unnecessary-do_each_task_pidpidtype_pgid.patch
session_of_pgrp-kill-unnecessary-do_each_task_pidpidtype_pgid.patch
pidhash-temporary-debug-checks.patch
-
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