From: Chris Rankin <rankincj@yahoo.com>
To: Jens Axboe <axboe@suse.de>
Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [OOPS] 2.6.11 - NMI lockup with CFQ scheduler
Date: Tue, 29 Mar 2005 13:22:26 +0100 (BST) [thread overview]
Message-ID: <20050329122226.94666.qmail@web52902.mail.yahoo.com> (raw)
In-Reply-To: 6667
>> > I have one IDE hard disc, but I was using a USB memory stick at one
> > point. (Notice the usb-storage and vfat modules in my list.) Could
> > that be the troublesome SCSI device?
--- Jens Axboe <axboe@suse.de> wrote:
> Yes, it probably is. What happens is that you insert the stick and do io
> against it, which sets up a process io context for that device. That
> context persists until the process exits (or later, if someone still
> holds a reference to it), but the queue_lock will be dead when you yank
> the usb device.
>
> It is quite a serious problem, not just for CFQ. SCSI referencing is
> badly broken there.
That would explain why it was nautilus which caused the oops then. Does this mean that the major
distros aren't using the CFQ then? Because how else can they be avoiding this oops with USB
storage devices?
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next reply other threads:[~2005-03-29 12:22 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-29 12:22 Chris Rankin [this message]
2005-03-29 12:26 ` [OOPS] 2.6.11 - NMI lockup with CFQ scheduler Jens Axboe
2005-04-06 12:31 ` Jens Axboe
2005-04-06 12:52 ` Arjan van de Ven
2005-04-06 12:55 ` Jens Axboe
2005-04-06 13:38 ` Tejun Heo
2005-04-06 18:01 ` Jens Axboe
2005-04-06 20:32 ` Mike Anderson
[not found] <20050329115405.97559.qmail@web52909.mail.yahoo.com>
2005-03-29 12:03 ` Jens Axboe
2005-04-06 16:27 ` James Bottomley
2005-04-06 17:58 ` Jens Axboe
2005-04-06 18:20 ` James Bottomley
2005-04-06 19:08 ` Jens Axboe
2005-04-06 21:09 ` James Bottomley
2005-04-07 6:49 ` Jens Axboe
2005-04-07 13:18 ` James Bottomley
2005-04-07 13:22 ` Christoph Hellwig
2005-04-07 13:24 ` Jens Axboe
2005-04-07 13:30 ` James Bottomley
2005-04-07 13:32 ` Jens Axboe
2005-04-07 13:39 ` James Bottomley
2005-04-07 14:45 ` Jens Axboe
2005-04-08 13:04 ` James Bottomley
2005-04-08 13:09 ` Jens Axboe
2005-04-07 13:24 ` Jens Axboe
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