From: Vladislav Bolkhovitin <vst@vlnb.net>
To: Christoph Hellwig <hch@infradead.org>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
linux-driver@qlogic.com, linux-scsi@vger.kernel.org,
scst-devel@lists.sourceforge.net
Subject: Re: [PATCH] qla2xxx: Fix dpc_thread race on the module unload
Date: Tue, 29 Jul 2008 13:32:43 +0400 [thread overview]
Message-ID: <488EE3BB.1020906@vlnb.net> (raw)
In-Reply-To: <20080729042701.GA30333@infradead.org>
Christoph Hellwig wrote:
> On Mon, Jul 28, 2008 at 12:56:16PM -0500, James Bottomley wrote:
>> On Mon, 2008-07-28 at 21:33 +0400, Vladislav Bolkhovitin wrote:
>>> This patch fixes race on dpc_thread field of struct scsi_qla_host,
>>> which can lead to crash on the module unload.
>>>
>>> This patch is against 2.6.26
>> I'm afraid adding a lock is almost certainly the wrong way to handle
>> this type of failure. What should be done is to make sure the qla is
>> correctly shut down (i.e. no tasks requiring the dpc_thread can be
>> performed) *before* killing the thread ... it sounds like shutdown is
>> slightly broken in the current driver ... could you post the oops
>> details and we can try to work out what the problem is
>
> I'm not even sure it's the current driver as he mentions that he using
> some out of tree target driver which might be the problem.
>
> Can you reproduce it with a stock 2.6.27-rc tree?
The race is still in 2.6.27-rc1.
Vlad
next prev parent reply other threads:[~2008-07-29 9:32 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-28 17:33 [PATCH] qla2xxx: Fix dpc_thread race on the module unload Vladislav Bolkhovitin
2008-07-28 17:41 ` Andrew Vasquez
2008-07-28 17:49 ` Vladislav Bolkhovitin
2008-07-28 17:56 ` James Bottomley
2008-07-28 18:14 ` Vladislav Bolkhovitin
2008-07-29 7:30 ` Gal Rosen
2008-07-30 7:10 ` Gal Rosen
2008-07-31 6:12 ` Gal Rosen
2008-07-31 9:11 ` Vladislav Bolkhovitin
2008-07-31 16:02 ` Andrew Vasquez
2008-07-31 17:41 ` Vladislav Bolkhovitin
2008-07-31 17:55 ` Andrew Vasquez
2008-08-01 12:28 ` Vladislav Bolkhovitin
2008-07-29 4:27 ` Christoph Hellwig
2008-07-29 9:32 ` Vladislav Bolkhovitin [this message]
2008-07-28 18:07 ` Andrew Vasquez
2008-07-29 9:32 ` Vladislav Bolkhovitin
2008-07-29 14:40 ` James Bottomley
2008-07-29 15:13 ` Vladislav Bolkhovitin
2008-07-29 15:28 ` James Bottomley
2008-07-29 15:36 ` Vladislav Bolkhovitin
2008-07-30 10:30 ` Andrew Vasquez
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