From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Jesse Barnes <jesse.barnes@intel.com>,
Andreas Schwab <schwab@suse.de>, Len Brown <lenb@kernel.org>
Subject: Re: PCI PM: Restore standard config registers of all devices early
Date: Tue, 3 Feb 2009 13:09:25 +0100 [thread overview]
Message-ID: <20090203120925.GA19979@elte.hu> (raw)
In-Reply-To: <1233659215.10184.19.camel@laptop>
* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> On Tue, 2009-02-03 at 06:06 +0100, Ingo Molnar wrote:
> >
> > Mutexes should work just fine in irqs-off sections - they'll safely
> > save/restore interrupts, even the debug variants.
>
> mutex_lock() has might_sleep() which will generate a splat in atomic
> contexts.
>
> That said, afaik the acpi code uses semaphores.
even the might_sleep() should be OK with Linus's system_state change to the
suspend code:
void __might_sleep(char *file, int line)
{
#ifdef in_atomic
static unsigned long prev_jiffy; /* ratelimiting */
if ((!in_atomic() && !irqs_disabled()) ||
system_state != SYSTEM_RUNNING || oops_in_progress)
Ingo
next prev parent reply other threads:[~2009-02-03 12:10 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200901261904.n0QJ4Q9c016709@hera.kernel.org>
2009-02-02 9:54 ` PCI PM: Restore standard config registers of all devices early Benjamin Herrenschmidt
2009-02-02 17:06 ` Linus Torvalds
2009-02-02 20:29 ` Benjamin Herrenschmidt
2009-02-02 20:41 ` Linus Torvalds
2009-02-02 21:00 ` Benjamin Herrenschmidt
2009-02-02 21:32 ` Rafael J. Wysocki
2009-02-02 20:33 ` Benjamin Herrenschmidt
2009-02-02 20:50 ` Linus Torvalds
2009-02-02 20:55 ` Linus Torvalds
2009-02-02 21:19 ` Benjamin Herrenschmidt
2009-02-02 21:39 ` Rafael J. Wysocki
2009-02-02 22:05 ` Linus Torvalds
2009-02-02 22:09 ` Linus Torvalds
2009-02-02 22:31 ` Rafael J. Wysocki
2009-02-02 23:18 ` Linus Torvalds
2009-02-02 23:45 ` Rafael J. Wysocki
2009-02-02 23:59 ` Linus Torvalds
2009-02-03 0:15 ` Rafael J. Wysocki
2009-02-03 0:28 ` Linus Torvalds
2009-02-03 1:12 ` Benjamin Herrenschmidt
2009-02-03 1:32 ` Linus Torvalds
2009-02-03 1:46 ` Benjamin Herrenschmidt
2009-02-03 3:30 ` Benjamin Herrenschmidt
2009-02-03 3:47 ` Linus Torvalds
2009-02-03 4:03 ` Benjamin Herrenschmidt
2009-02-03 6:07 ` Benjamin Herrenschmidt
2009-02-03 15:48 ` Linus Torvalds
2009-02-03 22:59 ` Benjamin Herrenschmidt
2009-02-03 23:23 ` Rafael J. Wysocki
2009-02-03 16:33 ` Jesse Barnes
2009-02-03 0:15 ` Linus Torvalds
2009-02-03 0:58 ` Benjamin Herrenschmidt
2009-02-03 3:51 ` Benjamin Herrenschmidt
2009-02-03 3:55 ` Benjamin Herrenschmidt
2009-02-03 4:09 ` Linus Torvalds
2009-02-03 4:21 ` Benjamin Herrenschmidt
2009-02-03 9:26 ` Rafael J. Wysocki
2009-02-03 17:04 ` Reworking suspend-resume sequence (was: Re: PCI PM: Restore standard config registers of all devices early) Rafael J. Wysocki
2009-02-03 17:59 ` Linus Torvalds
2009-02-03 18:31 ` Linus Torvalds
2009-02-03 18:41 ` Ingo Molnar
2009-02-03 18:32 ` Jesse Barnes
2009-02-03 18:46 ` Linus Torvalds
2009-02-03 19:03 ` Linus Torvalds
2009-02-03 19:13 ` Ingo Molnar
2009-02-03 19:38 ` Linus Torvalds
2009-02-03 19:53 ` Ingo Molnar
2009-02-03 20:04 ` Ingo Molnar
2009-02-03 20:18 ` Linus Torvalds
2009-02-03 20:57 ` Ingo Molnar
2009-02-03 21:04 ` Ingo Molnar
2009-02-03 21:12 ` Thomas Gleixner
2009-02-04 10:07 ` Russell King
2009-02-03 21:18 ` Linus Torvalds
2009-02-03 19:19 ` Linus Torvalds
2009-02-03 21:11 ` Benjamin Herrenschmidt
2009-02-03 21:53 ` Rafael J. Wysocki
2009-02-03 22:33 ` Benjamin Herrenschmidt
2009-02-03 22:44 ` Rafael J. Wysocki
2009-02-03 23:05 ` Benjamin Herrenschmidt
2009-02-03 23:18 ` Linus Torvalds
2009-02-04 0:27 ` Benjamin Herrenschmidt
2009-03-04 8:02 ` Pavel Machek
2009-03-04 23:25 ` Benjamin Herrenschmidt
2009-03-05 8:19 ` Pavel Machek
2009-03-05 19:09 ` Rafael J. Wysocki
2009-02-03 23:25 ` Rafael J. Wysocki
2009-02-04 0:46 ` Linus Torvalds
2009-02-03 21:02 ` Benjamin Herrenschmidt
2009-02-03 21:56 ` Rafael J. Wysocki
2009-02-03 17:53 ` PCI PM: Restore standard config registers of all devices early Linus Torvalds
2009-02-03 21:57 ` Rafael J. Wysocki
2009-02-02 22:48 ` Benjamin Herrenschmidt
2009-02-02 23:00 ` Rafael J. Wysocki
2009-02-03 0:23 ` Benjamin Herrenschmidt
2009-02-03 0:29 ` Rafael J. Wysocki
2009-02-03 0:44 ` Linus Torvalds
2009-02-03 1:32 ` Benjamin Herrenschmidt
2009-02-03 5:06 ` Ingo Molnar
2009-02-03 11:06 ` Peter Zijlstra
2009-02-03 12:09 ` Ingo Molnar [this message]
2009-02-02 23:49 ` Ingo Molnar
2009-02-03 22:09 ` Rafael J. Wysocki
2009-02-03 23:13 ` Linus Torvalds
2009-02-02 22:28 ` Benjamin Herrenschmidt
2009-02-02 21:07 ` Benjamin Herrenschmidt
2009-02-02 21:49 ` Rafael J. Wysocki
2009-02-02 22:15 ` Linus Torvalds
2009-02-02 22:33 ` Rafael J. Wysocki
2009-02-02 22:56 ` Rafael J. Wysocki
2009-02-03 0:11 ` Benjamin Herrenschmidt
2009-02-03 0:21 ` Linus Torvalds
2009-02-10 20:25 ` Pavel Machek
2009-02-02 22:57 ` Benjamin Herrenschmidt
2009-02-02 23:22 ` Rafael J. Wysocki
2009-02-03 1:03 ` Benjamin Herrenschmidt
2009-02-10 20:25 ` kmalloc during suspend, was " Pavel Machek
2009-02-02 17:20 ` Rafael J. Wysocki
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