Re: [PATCH] ext2: Fix data corruption for racing writes

[Ying Han <yinghan@google.com>]

On Thu, Apr 9, 2009 at 1:59 PM, Ying Han <yinghan@google.com> wrote:
> On Thu, Apr 9, 2009 at 1:30 PM, Andrew Morton <akpm@linux-foundation.org> wrote:
>> On Mon, 6 Apr 2009 12:23:29 +0200
>> Jan Kara <jack@suse.cz> wrote:
>>
>>> >
>>> > I tried this patch and seems i got deadlock on the truncate_mutex.
>>> > Here is the message after enabling lockdep. I pasted the same message
>>> > on the origianal thread.
>>>
>>> ...
>>>
>>>   I don't think this is a deadlock (or is the machine hung?). The thread
>>> was just waiting for a long time. I'd think that you'll occasionally get
>>> exactly the same message even without my patch if you stress the machine
>>> like you do.
>>>
>>
>> Well, it's easy to tell the difference
>>
>> deadlock: system never recovers
>> long-sucky-delay: system eventually recovers.
>>
>> Which was it??
> Guess i have to retest it. I didn't wait long enough to see what
> happened on the machine. However, i do see the machine got rebooted
> later, but i am not sure what is the reason it is got reboot.
>
> I will rerun the patch and keep an eye on it this time.

Ok, i rerun the patch and i don't see the message poping this time and
the machine is up healthy.

>
> --Ying
>>
>