From: Peter Zijlstra <peterz@infradead.org>
To: Avi Kivity <avi@qumranet.com>
Cc: Jens Axboe <jens.axboe@oracle.com>,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
npiggin@suse.de, torvalds@linux-foundation.org
Subject: Re: [PATCH 1/11] Add generic helpers for arch IPI function calls
Date: Tue, 22 Apr 2008 16:43:57 +0200 [thread overview]
Message-ID: <1208875437.7115.271.camel@twins> (raw)
In-Reply-To: <480DF861.6000705@qumranet.com>
On Tue, 2008-04-22 at 17:38 +0300, Avi Kivity wrote:
> Jens Axboe wrote:
> >> Introducing this fallback will make any usage from irq disabled context
> >> deadlock prone.
> >>
> >> I rather like the current interface.
> >>
> >
> > Hmm good point, I'll back that bit out again.
> >
>
> But then you need to fix all callers to handle errors.
Sure.
> Perhaps we need a new flag for failable async IPIs (or better, API).
> I'm pretty sure no one uses s_c_f_s() from irq disabled context on x86,
> since it will WARN_ON(irqs_disabled()).
Yeah, no current users, but that doesn't say I don't want to add new
ones ;-)
next prev parent reply other threads:[~2008-04-22 14:45 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-22 7:57 [PATCH 0/11] Generic smp_call_function() and friends Jens Axboe
2008-04-22 7:57 ` [PATCH 1/11] Add generic helpers for arch IPI function calls Jens Axboe
2008-04-22 9:16 ` Avi Kivity
2008-04-22 9:22 ` Jens Axboe
2008-04-22 11:14 ` Jens Axboe
2008-04-22 13:00 ` Peter Zijlstra
2008-04-22 14:25 ` Jens Axboe
2008-04-22 14:38 ` Avi Kivity
2008-04-22 14:43 ` Peter Zijlstra [this message]
2008-04-22 14:47 ` Avi Kivity
2008-04-22 14:53 ` Jens Axboe
2008-04-22 14:43 ` Linus Torvalds
2008-04-22 14:51 ` Jens Axboe
2008-04-22 15:01 ` Linus Torvalds
2008-04-22 16:49 ` Jens Axboe
2008-04-22 17:04 ` Jens Axboe
2008-04-22 17:13 ` Jens Axboe
2008-04-22 17:29 ` Linus Torvalds
2008-04-22 18:23 ` Jens Axboe
2008-04-22 18:39 ` Linus Torvalds
2008-04-22 14:58 ` Linus Torvalds
2008-04-22 15:07 ` Jens Axboe
2008-04-22 23:12 ` Mark Lord
2008-04-23 7:24 ` Jens Axboe
2008-04-23 13:42 ` Mark Lord
2008-04-23 13:51 ` Jens Axboe
2008-04-23 14:46 ` Mark Lord
2008-04-24 10:59 ` Jens Axboe
2008-04-24 12:44 ` Mark Lord
2008-04-24 21:30 ` Rafael J. Wysocki
2008-04-25 11:08 ` Pavel Machek
2008-04-26 8:04 ` Pavel Machek
2008-04-28 15:13 ` Mark Lord
2008-05-01 16:23 ` Pavel Machek
2008-04-22 7:57 ` [PATCH 2/11] x86: convert to generic helpers for " Jens Axboe
2008-04-22 8:38 ` Sam Ravnborg
2008-04-22 8:43 ` Jens Axboe
2008-04-22 11:15 ` Jens Axboe
2008-04-22 8:47 ` Ingo Molnar
2008-04-22 8:48 ` Jacek Luczak
2008-04-22 8:56 ` Jens Axboe
2008-04-22 9:04 ` Jacek Luczak
2008-04-22 8:52 ` Jens Axboe
2008-04-26 8:59 ` Jeremy Fitzhardinge
2008-04-22 7:57 ` [PATCH 3/11] powerpc: " Jens Axboe
2008-04-22 12:03 ` Paul Mackerras
2008-04-22 12:13 ` Jens Axboe
2008-04-22 12:42 ` Paul Mackerras
2008-04-22 18:51 ` Jens Axboe
2008-04-22 7:57 ` [PATCH 4/11] ia64: " Jens Axboe
2008-04-22 7:57 ` [PATCH 5/11] alpha: " Jens Axboe
2008-04-22 7:57 ` [PATCH 6/11] arm: " Jens Axboe
2008-04-22 15:00 ` Catalin Marinas
2008-04-22 18:43 ` Jens Axboe
2008-04-22 7:57 ` [PATCH 7/11] m32r: " Jens Axboe
2008-04-22 7:57 ` [PATCH 8/11] mips: " Jens Axboe
2008-04-22 7:57 ` [PATCH 9/11] parisc: " Jens Axboe
2008-04-22 14:09 ` Kyle McMartin
2008-04-22 14:27 ` Jens Axboe
2008-04-22 14:30 ` Kyle McMartin
2008-04-22 14:49 ` Jens Axboe
2008-04-22 7:57 ` [PATCH 10/11] sh: " Jens Axboe
2008-04-22 7:57 ` [PATCH 11/11] s390: " Jens Axboe
2008-04-22 8:04 ` Martin Schwidefsky
2008-04-22 8:07 ` Jens Axboe
2008-04-22 7:57 ` Jens Axboe
2008-04-22 8:48 ` [PATCH 0/11] Generic smp_call_function() and friends Peter Zijlstra
-- strict thread matches above, loose matches on Subject: below --
2008-04-22 18:50 [PATCH 0/11] Generic smp_call_function() #2 Jens Axboe
2008-04-22 18:50 ` [PATCH 1/11] Add generic helpers for arch IPI function calls Jens Axboe
2008-04-22 20:17 ` Peter Zijlstra
2008-04-23 6:07 ` Jens Axboe
2008-04-23 6:32 ` Peter Zijlstra
2008-04-23 7:49 ` Jens Axboe
2008-04-23 7:50 ` Peter Zijlstra
2008-04-24 22:01 ` Russell King
2008-04-25 7:18 ` Jens Axboe
2008-04-26 6:28 ` Jeremy Fitzhardinge
2008-04-28 7:38 ` Jes Sorensen
2008-04-26 6:11 ` Andrew Morton
2008-04-26 14:13 ` James Bottomley
2008-04-28 14:25 ` David Howells
2008-04-28 14:43 ` James Bottomley
2008-04-27 0:58 ` Paul E. McKenney
2008-04-27 10:36 ` Jens Axboe
2008-04-27 10:30 ` Jens Axboe
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