Re: BTRFS hang with 3.16-rc5

[Martin Steigerwald <Martin@lichtvoll.de>]

Am Dienstag, 15. Juli 2014, 09:21:40 schrieb Chris Mason:
> On 07/14/2014 05:58 PM, Martin Steigerwald wrote:
> > Am Montag, 14. Juli 2014, 16:12:22 schrieb Chris Mason:
> >> On 07/14/2014 11:10 AM, Martin Steigerwald wrote:
> >>> Am Montag, 14. Juli 2014, 17:04:22 schrieben Sie:
> >>>> Hi!
> >>>> 
> >>>> While with 3.16-rc3 and rc4 I didn´t have a BTRFS hang in several days
> >>>> of
> >>>> usage, with 3-16-rc5 I had a hang again. Less than a hour since booting
> >>>> it.
> >>>> 
> >>>> Since the hang bug I and others had with 3.15 and upto 3.16-rc2 usually
> >>>> didn´t happen that quickly after boot and since backtrace looks a bit
> >>>> different from what I have in memory, I post this in a new thread.
> >>>> See thread "Blocked tasks on 3.15.1" for a discussion of previous hang
> >>>> issues.
> >>> 
> >>> Probably good to add some basic information on the filesystem:
> >> Do you have compression enabled?  I wasn't able to nail down the 3.15.1
> >> hang before vacation attacked me, but I'm hoping to track it down today.
> > 
> > Yes. I have.
> > 
> > It just hung again while I was playing PlaneShift.
> > 
> > Back to 3.16-rc4 as rc5 seems to be broke here.
> 
> The btrfs hang you're hitting goes back to 3.15.  So 3.16-rc4 vs rc5
> shouldn't be a factor.  Are you hitting other problems with 3.16?

On this system it is a matter.

3.16-rc5: Two hangs in one day

3.16-rc4: No hang so far with three days uptime (well with hibernation cycles 
in between)

So easy observation for me: 3.16-rc4 fine, 3.16-rc5 broke.

Ciao,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7