From: Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>
To: Michael Leun <lkml20130126-yS7QfQBdiAdyjo5WHAzKoQ@public.gmane.org>
Cc: Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>,
Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Mandeep Singh Baines
<msb-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Darren Hart <dvhart-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Randy Dunlap <rdunlap-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Al Viro <viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
Subject: Re: 3.11-rc regression bisected: s2disk does not work (was Re: [PATCH v3 13/16] futex: use freezable blocking call)
Date: Tue, 23 Jul 2013 02:26:28 +0200 [thread overview]
Message-ID: <20130723002627.GA11751@amd.pavel.ucw.cz> (raw)
In-Reply-To: <20130723010250.5a3465ec-gjVD6BTPoEbYa4IuQwzu8g@public.gmane.org>
On Tue 2013-07-23 01:02:50, Michael Leun wrote:
> On Mon, 6 May 2013 16:50:18 -0700
> Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org> wrote:
>
> > Avoid waking up every thread sleeping in a futex_wait call during
> [...]
>
> With 3.11-rc s2disk from suspend-utils stopped working: Frozen at
> displaying 0% of saving image to disk.
>
> echo "1" >/sys/power/state still works.
>
> Bisecting yielded 88c8004fd3a5fdd2378069de86b90b21110d33a4, reverting
> that from 3.11-rc2 makes s2disk working again.
Would id be possible to get all the backtraces using magic sysrq?
...actually...
I see what could happen. Before, system hibernated in state where all
the futexes were unlocked. Now, it can happen that we attempt s2disk
with futex held. s2disk should not depend on other parts of userspace,
and should not take futexes, but maybe it does...?
Pavel
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next prev parent reply other threads:[~2013-07-23 0:26 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-06 23:50 [PATCH v2 00/10] optimize freezing tasks by reducing task wakeups Colin Cross
2013-05-06 23:50 ` [PATCH v3 01/16] freezer: add unsafe versions of freezable helpers for NFS Colin Cross
2013-05-06 23:50 ` [PATCH v3 02/16] freezer: add unsafe versions of freezable helpers for CIFS Colin Cross
2013-05-07 10:07 ` Jeff Layton
[not found] ` <20130507060730.03364687-9yPaYZwiELC+kQycOl6kW4xkIHaj4LzF@public.gmane.org>
2013-05-07 17:47 ` Colin Cross
[not found] ` <CAMbhsRQ1i_dFctwjkqjg3=GJdEc8ReEDk=NnEFEXj8u3MaEqDA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-05-07 17:52 ` [PATCH v4 " Colin Cross
[not found] ` <1367949125-21809-1-git-send-email-ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
2013-05-07 18:11 ` Jeff Layton
[not found] ` <1367884221-20462-3-git-send-email-ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
2013-05-07 12:28 ` [PATCH v3 " Pavel Machek
2013-05-06 23:50 ` [PATCH v3 03/16] lockdep: remove task argument from debug_check_no_locks_held Colin Cross
2013-05-07 12:28 ` Pavel Machek
2013-05-06 23:50 ` [PATCH v3 04/16] lockdep: check that no locks held at freeze time Colin Cross
[not found] ` <1367884221-20462-5-git-send-email-ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
2013-05-07 12:29 ` Pavel Machek
[not found] ` <1367884221-20462-1-git-send-email-ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
2013-05-06 23:50 ` [PATCH v3 05/16] freezer: shorten freezer sleep time using exponential backoff Colin Cross
2013-05-06 23:50 ` [PATCH v3 06/16] freezer: skip waking up tasks with PF_FREEZER_SKIP set Colin Cross
2013-05-06 23:50 ` [PATCH v3 07/16] freezer: convert freezable helpers to freezer_do_not_count() Colin Cross
2013-05-06 23:50 ` [PATCH v3 08/16] freezer: convert freezable helpers to static inline where possible Colin Cross
2013-05-06 23:50 ` [PATCH v3 09/16] freezer: add new freezable helpers using freezer_do_not_count() Colin Cross
2013-05-06 23:50 ` [PATCH v3 10/16] binder: use freezable blocking calls Colin Cross
2013-05-06 23:50 ` [PATCH v3 11/16] epoll: use freezable blocking call Colin Cross
2013-05-06 23:50 ` [PATCH v3 12/16] select: " Colin Cross
2013-05-06 23:50 ` [PATCH v3 13/16] futex: " Colin Cross
2013-07-22 23:02 ` 3.11-rc regression bisected: s2disk does not work (was Re: [PATCH v3 13/16] futex: use freezable blocking call) Michael Leun
2013-07-22 23:55 ` Colin Cross
2013-07-23 0:32 ` Linus Torvalds
[not found] ` <CA+55aFzUVPJe96z8V0F-znc8ZcpJid7LEeYww80M-Mx=S91tAA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-23 0:42 ` Colin Cross
[not found] ` <CAMbhsRReF9xB597i9CcCj7D1P5kvB4cc0JmDQYeboqi11Kp99A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-23 1:41 ` Rafael J. Wysocki
[not found] ` <15305281.aClQ8XUG9t-sKB8Sp2ER+y1GS7QM15AGw@public.gmane.org>
2013-07-23 6:28 ` Colin Cross
2013-07-23 20:31 ` Colin Cross
2013-07-23 21:58 ` Michael Leun
2013-07-23 18:08 ` Michael Leun
2013-07-23 18:24 ` Darren Hart
2013-07-23 18:29 ` Colin Cross
2013-07-23 19:16 ` Michael Leun
[not found] ` <20130723211622.50f75087-gjVD6BTPoEbYa4IuQwzu8g@public.gmane.org>
2013-07-23 19:29 ` Colin Cross
[not found] ` <CAMbhsRQU=TswYg-2WqHmzt-_GpfMFpYHPSU4eFd5XMw7DRGXJA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-23 19:58 ` Michael Leun
[not found] ` <CAMbhsRT6zOKLhG_uh=nA8H_3d7afhG+4jvWjvidY3fEguryP_Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-07-23 21:43 ` Rafael J. Wysocki
[not found] ` <20130723010250.5a3465ec-gjVD6BTPoEbYa4IuQwzu8g@public.gmane.org>
2013-07-23 0:26 ` Pavel Machek [this message]
2013-05-06 23:50 ` [PATCH v3 14/16] nanosleep: use freezable blocking call Colin Cross
2013-05-06 23:50 ` [PATCH v3 15/16] sigtimedwait: " Colin Cross
2013-05-06 23:50 ` [PATCH v3 16/16] af_unix: use freezable blocking calls in read Colin Cross
2013-05-07 18:12 ` [PATCH v2 00/10] optimize freezing tasks by reducing task wakeups Tejun Heo
2013-05-08 0:02 ` Rafael J. Wysocki
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