From: "Yinghai Lu" <yinghai@kernel.org>
To: "Kumar Gala" <galak@kernel.crashing.org>
Cc: Andrew Morton <akpm@osdl.org>,
linuxppc-dev@ozlabs.org, Linus Torvalds <torvalds@osdl.org>,
tglx@linutronix.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] irq: Maintain user set affinity
Date: Sat, 8 Nov 2008 14:12:28 -0800 [thread overview]
Message-ID: <86802c440811081412u6d54beaam143801ce83225f40@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0811041030520.25054@blarg.am.freescale.net>
On Tue, Nov 4, 2008 at 8:31 AM, Kumar Gala <galak@kernel.crashing.org> wrote:
> From 819ad3ed4660f4238e053728a8b5aa93d22b13d7 Mon Sep 17 00:00:00 2001
> From: Kumar Gala <galak@kernel.crashing.org>
> Date: Tue, 4 Nov 2008 10:13:53 -0600
> Subject: [PATCH 1/1] irq: Maintain user set affinity
>
> This addresses a regression in that if a user specified an affinity
> for an interrupt that affinity information would get reset between
> a request_irq(), free_irq() and request_irq() for the same irq.
>
> On example of this is bringing up an ethernet interface, taking
> it down and bringing it back up again.
>
> Instead of always using the irq_default_affinity we use the
> previous setting of the IRQs affinity with the assumption that
> at boot the IRQs affinity will be set to irq_default_affinity.
why ?, the default_affinity is expected behavior...
for example: when MSI is used, second driver could get same irq if
first driver is unloaded.
YH
next prev parent reply other threads:[~2008-11-08 22:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-04 16:31 [PATCH 1/1] irq: Maintain user set affinity Kumar Gala
2008-11-06 21:35 ` Andrew Morton
2008-11-06 23:23 ` Kumar Gala
2008-11-08 22:13 ` Yinghai Lu
2008-11-08 22:12 ` Yinghai Lu [this message]
2008-11-08 22:17 ` Benjamin Herrenschmidt
2008-11-09 0:01 ` Yinghai Lu
2008-11-09 2:17 ` Benjamin Herrenschmidt
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