From: ebiederm@xmission.com (Eric W. Biederman)
To: "Emmanuel Fusté" <emmanuel.fuste@laposte.net>
Cc: "djwong" <djwong@us.ibm.com>,
"linux-kernel" <linux-kernel@vger.kernel.org>
Subject: Re: Device hang when offlining a CPU due to IRQ misrouting
Date: Fri, 01 Jun 2007 18:18:32 -0600 [thread overview]
Message-ID: <m1sl9bxl7r.fsf@ebiederm.dsl.xmission.com> (raw)
In-Reply-To: <JIZ905$469B6EF277FE655A66C9ACE2321FC036@laposte.net> (Emmanuel =?iso-8859-1?Q?Fust=E9's?= message of "Fri, 1 Jun 2007 23:57:41 +0200")
> As a side note, on my very old SMP machine, 2.6.20 correctly
> load-balance IRQs across CPU but 2.6.21 not. I know that
> in-kernel IRQ load balancer is marked as deprecated and
> somewhat broken, but with your report it make me think it
> could be a bug in the IRQ rerouting part in my case too and
> not necessary in the load-balancer (decision) part.
I doubt it. The practical problem is that cpu_down does not
and by design can not call the irq balancing part properly
and I haven't yet seen anything to suggest that we don't migrate
irq properly.
So I'm guessing it was the decision part.
Eric
next prev parent reply other threads:[~2007-06-02 0:19 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-01 21:57 Emmanuel Fusté
2007-06-02 0:18 ` Eric W. Biederman [this message]
2007-06-02 2:19 ` Darrick J. Wong
2007-06-02 3:48 ` Eric W. Biederman
-- strict thread matches above, loose matches on Subject: below --
2007-06-03 21:03 Emmanuel Fusté
2007-06-01 0:44 Darrick J. Wong
2007-06-01 19:39 ` Eric W. Biederman
2007-06-05 17:23 ` Siddha, Suresh B
2007-06-05 17:36 ` Darrick J. Wong
2007-06-05 18:13 ` Siddha, Suresh B
2007-06-05 18:33 ` Darrick J. Wong
2007-06-05 18:40 ` Siddha, Suresh B
2007-06-05 20:09 ` Darrick J. Wong
2007-06-05 21:14 ` Siddha, Suresh B
2007-06-05 23:57 ` Darrick J. Wong
2007-06-06 1:37 ` Siddha, Suresh B
2007-06-06 18:58 ` Darrick J. Wong
2007-06-06 19:35 ` Siddha, Suresh B
2007-06-06 23:16 ` Darrick J. Wong
2007-06-08 0:57 ` Siddha, Suresh B
2007-06-18 22:38 ` Darrick J. Wong
2007-06-18 23:54 ` Siddha, Suresh B
2007-06-19 0:51 ` Darrick J. Wong
2007-06-19 17:54 ` Eric W. Biederman
2007-06-19 18:00 ` Siddha, Suresh B
2007-06-19 18:55 ` Eric W. Biederman
2007-06-19 19:06 ` Darrick J. Wong
2007-06-19 19:59 ` Siddha, Suresh B
2007-06-19 20:49 ` Darrick J. Wong
2007-06-19 22:08 ` Siddha, Suresh B
2007-06-23 23:54 ` Rafael J. Wysocki
2007-06-23 23:58 ` Andrew Morton
2007-06-24 0:45 ` Eric W. Biederman
2007-06-24 0:51 ` Siddha, Suresh B
2007-06-24 12:50 ` Rafael J. Wysocki
2007-06-24 0:28 ` Siddha, Suresh B
2007-06-24 12:48 ` Rafael J. Wysocki
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