Re: WARNING: at fs/btrfs/free-space-cache.c:921 __btrfs_write_out_cache+0x6b9/0x9a0 [btrfs]()

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On Tue, Apr 30, 2013 at 08:55:00AM +0200, Helmut Hullen wrote:
> Hallo, Alexander,
> 
> Du meintest am 30.04.13:
> 
> > On my HP Compaq dc5800 with Ubuntu 13.04 and their
> > 3.8.0-19-lowlatency kernel, I've got quite some kernel traces in the
> > syslog.
> 
> It's a very good idea to use the newest kernel for btrfs. 3.8.0 is  
> really old.
> 
> Just try kernel 3.8.10.

   The differences in btrfs between the two are very small, and even
I(*) wouldn't call 3.8.0 "very old" quite yet, given that 3.9 was only
released yesterday. From memory, there's one btrfs patch in the 3.8
stable series.

   Your problem is "just" a warning, and appears to be something to do
with running out of space, or having too many CRCs... I don't really
know the free space cache code at all well, so I'm mostly guessing
here, from looking at the WARN_ON in __btrfs_write_out_cache.

   Hugo.

(*) High Priest of the Kernel Upgrade.

-- 
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
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