linux-kernel - Re: [PATCH v5] blk: fix a wrong accounting of hd_struct->in

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Message-ID: <4CBD6CAA.1060708@kernel.dk>
Date:	Tue, 19 Oct 2010 12:02:18 +0200
From:	Jens Axboe <axboe@...nel.dk>
To:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
CC:	kosaki.motohiro@...fujitsu.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5] blk: fix a wrong accounting of hd_struct->in_flight

On 2010-10-19 04:22, Yasuaki Ishimatsu wrote:
> Hi Jens,
> 
>> This version looks good, thanks for following through on this. What kind
>> of testing did you do?
> 
> I did three kinds of test.
> 
> 1. run a reproducer.
>    I confirmed the problem was fixed using attached the reproducer.
> 
> 2. remove and make a partition which is running I/O.
>    I confirmed the kernel panic or hungup did not occur using following steps.
> 
>      # dd if=/dev/sda of=null &
>      # while true
>      > do
>      > /sbin/parted /dev/sda rm 3 > /dev/null
>      > /sbin/parted /dev/sda mkpart primary ext2 42.5GB 52.5GB > /dev/null
>      > sleep 2
>      > done
> 
> 3. reload a partition which is running I/O.
>    I confirmed the kernel panic or hungup did not occur using following steps.
> 
>      # dd if=/dev/sda of=null &
>      # while true
>      > do
>      > /sbin/hdparm -z /dev/sda
>      > sleep 2
>      > done

Thanks, sounds good! I have queued it up for 2.6.37 and marked as a
stable backport candidate.

-- 
Jens Axboe

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