linux-kernel - Re: [PATCH] sched: fix another race when reading /proc/sched

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 15 Dec 2008 09:39:18 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Paul Menage <menage@...gle.com>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] sched: fix another race when reading /proc/sched_debug

Paul Menage wrote:
> I sent out some patches last week (search for hierarchy_mutex) that would
> mean that you'd only need to take a subsystem-local lock to keep a cgroup
> alive. People seemed to like them so I'll tweak them based on feedback and
> send them on to Andrew.
> 

Unfortunately, AFAICS the proposed hierarchy_mutex can't solve this bug. :(

> Paul
> 
> On Dec 14, 2008 4:48 AM, "Peter Zijlstra" <a.p.zijlstra@...llo.nl> wrote:
> 
> On Sun, 2008-12-14 at 10:54 +0800, Li Zefan wrote: > > i merged it up in
> tip/master, could you pleas...
> Can't we detect a dead task-group and skip those instead of adding this
> global lock?
> 
>> Signed-off-by: Li Zefan <lizf@...fujitsu.com> > --- > kernel/sched_fair.c
> | 6 ++++++ > kerne...
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/