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From: Tejun Heo <tj@kernel.org>
To: linux-kernel@vger.kernel.org, dvyukov@google.com,
	mingo@kernel.org, peterz@infradead.org, sasha.levin@oracle.com,
	torvalds@linux-foundation.org, hpa@zytor.com, tglx@linutronix.de
Cc: linux-tip-commits@vger.kernel.org
Subject: Re: [tip:sched/core] sched/core: Fix unserialized r-m-w scribbling stuff
Date: Wed, 6 Jan 2016 15:17:23 -0500	[thread overview]
Message-ID: <20160106201723.GH3660@htj.duckdns.org> (raw)
In-Reply-To: <tip-be958bdc96f18bc1356177bbb79d46ea0c037b96@git.kernel.org>

On Wed, Jan 06, 2016 at 10:48:15AM -0800, tip-bot for Peter Zijlstra wrote:
> Commit-ID:  be958bdc96f18bc1356177bbb79d46ea0c037b96
> Gitweb:     http://git.kernel.org/tip/be958bdc96f18bc1356177bbb79d46ea0c037b96
> Author:     Peter Zijlstra <peterz@infradead.org>
> AuthorDate: Wed, 25 Nov 2015 16:02:07 +0100
> Committer:  Ingo Molnar <mingo@kernel.org>
> CommitDate: Wed, 6 Jan 2016 11:01:07 +0100
> 
> sched/core: Fix unserialized r-m-w scribbling stuff
> 
> Some of the sched bitfieds (notably sched_reset_on_fork) can be set
> on other than current, this can cause the r-m-w to race with other
> updates.
> 
> Since all the sched bits are serialized by scheduler locks, pull them
> in a separate word.
> 
> Reported-by: Tejun Heo <tj@kernel.org>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Cc: Dmitry Vyukov <dvyukov@google.com>
> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Sasha Levin <sasha.levin@oracle.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: akpm@linux-foundation.org
> Cc: hannes@cmpxchg.org
> Cc: mhocko@kernel.org
> Cc: vdavydov@parallels.com
> Link: http://lkml.kernel.org/r/20151125150207.GM11639@twins.programming.kicks-ass.net
> Signed-off-by: Ingo Molnar <mingo@kernel.org>

cc stable?

-- 
tejun

      reply	other threads:[~2016-01-06 20:17 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-13 18:59 [PATCH 1/2] memcg: flatten task_struct->memcg_oom Tejun Heo
2015-09-13 18:59 ` Tejun Heo
2015-09-13 19:00 ` [PATCH v3 2/2] memcg: punt high overage reclaim to return-to-userland path Tejun Heo
2015-09-15  7:47   ` Johannes Weiner
2015-09-15  7:47     ` Johannes Weiner
2015-09-15 15:53     ` Tejun Heo
2015-09-15 16:12       ` Johannes Weiner
2015-09-15 16:22         ` Tejun Heo
2015-09-15 16:22           ` Tejun Heo
2015-09-15 16:33           ` Johannes Weiner
2015-09-15 16:33             ` Johannes Weiner
2015-09-15  7:37 ` [PATCH 1/2] memcg: flatten task_struct->memcg_oom Johannes Weiner
2015-09-15  7:37   ` Johannes Weiner
2015-09-20 14:45 ` Sasha Levin
2015-09-20 14:45   ` Sasha Levin
2015-09-21 20:01   ` Tejun Heo
2015-09-21 20:01     ` Tejun Heo
2015-09-30 18:54     ` Tejun Heo
2015-09-30 18:54       ` Tejun Heo
2015-11-25 14:43     ` Peter Zijlstra
2015-11-25 14:43       ` Peter Zijlstra
2015-11-25 15:02       ` Peter Zijlstra
2015-11-25 15:02         ` Peter Zijlstra
2015-11-25 15:31         ` Andrey Ryabinin
2015-11-25 17:34           ` Dmitry Vyukov
2015-11-25 17:34             ` Dmitry Vyukov
2015-11-25 17:44           ` Peter Zijlstra
2015-12-11 16:25             ` Tejun Heo
2015-12-11 16:25               ` Tejun Heo
2015-12-15 19:22               ` Peter Zijlstra
2015-12-30  9:23                 ` [PATCH v4.4-rc7] sched: isolate task_struct bitfields according to synchronization domains Tejun Heo
2015-12-30 20:10                   ` Linus Torvalds
2015-12-30 20:10                     ` Linus Torvalds
2015-12-30 20:17                     ` Linus Torvalds
2015-12-30 20:41                     ` Tejun Heo
2015-12-30 20:41                       ` Tejun Heo
2015-12-30 20:43                       ` Linus Torvalds
2016-01-01  2:56                     ` [PATCH v4.4-rc7] sched: move sched lock synchronized bitfields in task_struct into ->atomic_flags Tejun Heo
2016-01-01  2:56                       ` Tejun Heo
2016-01-06 13:44                       ` Tejun Heo
2016-01-06 13:44                         ` Tejun Heo
2016-01-06 18:48         ` [tip:sched/core] sched/core: Fix unserialized r-m-w scribbling stuff tip-bot for Peter Zijlstra
2016-01-06 20:17           ` Tejun Heo [this message]

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