]> err.no Git - linux-2.6/commit
fix setpriority(PRIO_PGRP) thread iterator breakage
authorKen Chen <kenchen@google.com>
Wed, 20 Aug 2008 21:09:17 +0000 (14:09 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 20 Aug 2008 22:40:32 +0000 (15:40 -0700)
commit2d70b68d42b5196a48ccb639e3797f097ef5bea3
treeb3040706cd69e0e7bc6d846e08fd91a441b34310
parent141d87e7debe3334018e46859c7565c44cebda65
fix setpriority(PRIO_PGRP) thread iterator breakage

When user calls sys_setpriority(PRIO_PGRP ...) on a NPTL style multi-LWP
process, only the task leader of the process is affected, all other
sibling LWP threads didn't receive the setting.  The problem was that the
iterator used in sys_setpriority() only iteartes over one task for each
process, ignoring all other sibling thread.

Introduce a new macro do_each_pid_thread / while_each_pid_thread to walk
each thread of a process.  Convert 4 call sites in {set/get}priority and
ioprio_{set/get}.

Signed-off-by: Ken Chen <kenchen@google.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/ioprio.c
include/linux/pid.h
kernel/sys.c