linux-kernel - Re: ext4: smp_processor

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Message-ID: <4B0FAAC6.30906@klingt.org>
Date:	Fri, 27 Nov 2009 11:32:38 +0100
From:	Tim Blechmann <tim@...ngt.org>
To:	"Leyendecker, Robert" <Robert.Leyendecker@....com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: ext4: smp_processor_id() in preemptible

> I have similar crash, but probably different cause-vector, posted on this list, fedora bugzilla, rt-users but no response so far from anyone. Did you find any work around?  I tried looking at smp code for hints on problem it looks like in my case it could be trying to reschedule work on different CPU at time of crash. However, I admit that I could be way, way off on that cause. In my case, if I hammer my network interface with packets while another app is reading packets, my host locks up and clients are reporting dest unreachables. 
> 
> I don't think I have the problem in non-rt kernel. Have you tried booting without smp support?

i haven't tried to reproduce it since then ... it occurred, when i was
doing some heavy io tasks ...

tim

-- 
tim@...ngt.org
http://tim.klingt.org

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