linux-kernel - Re: [BUG] disk_free_ptbl_rcu

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Message-ID: <4CC3D620.2090401@fusionio.com>
Date:	Sun, 24 Oct 2010 08:45:52 +0200
From:	Jens Axboe <jaxboe@...ionio.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] disk_free_ptbl_rcu_cb() crash

On 2010-10-24 08:44, Eric Dumazet wrote:
> Le dimanche 24 octobre 2010 à 08:04 +0200, Jens Axboe a écrit :
>> On 2010-10-23 23:10, Eric Dumazet wrote:
>>> Current Linus tree makes my machine crash in disk_free_ptbl_rcu_cb(),
>>> while booting...
>>>
>>> commit 7681bfeeccff5ef seems the problem ?
>>>
>>> Following patch solves the NULL dereference, but this is only to show
>>> you where the problem is, not a real fix, of course.
>>
>> Darn. Your fix is on the right path, you missed one though. I think it's
>> cleaner to move this into the elevator helpers, so that the callers can
>> remain clean.
>>
>> Can you verify that this works too?
> 
> Sure, I did right now and it works too, thanks !

Thanks for the (very) quick turn-around, I'll get this one expedited
as well.

-- 
Jens Axboe

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