Re: Hard lockup in ext4_finish_bio

[Nikolay Borisov]

On 10/08/2015 09:56 PM, John Stoffel wrote:
>>>>>> "Nikolay" == Nikolay Borisov <kernel@xxxxxxxx> writes:
> 
> Nikolay> On 10/08/2015 05:34 PM, John Stoffel wrote:
>>> Great bug report, but you're missing the info on which kernel
>>> you're
> 
> Nikolay> This is on 3.12.47 (self compiled). It was evident on my
> Nikolay> initial post, but I did forget to mention that in the
> Nikolay> reply. Also, I suspect even current kernel are susceptible to
> Nikolay> this since the locking in question hasn't changed.
> 
> Hi Nikolay, must have missed it.  I looked quickly, but didn't find
> it.  Since it's such an older kernel release, it might be best if you
> upgrade to the latest version and try to re-create the lock if at all
> possible.  

The relevant code hasn't changed. I've already posted RFC patches. You
can find the thread here: http://thread.gmane.org/gmane.linux.kernel/2056996

> 
> What kind of workload are you running on there?  And if you have more
> details on the hardware, that might help as well.  
> 
> John
> 
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