Re: use_block_rsv problems with 3.6.1

[Stefan Priebe <s.priebe@profihost.ag>]

Am 11.10.2012 20:51, schrieb Josef Bacik:
> On Thu, Oct 11, 2012 at 12:35:48PM -0600, Stefan Priebe wrote:
>> Hello,
>>
>> on i've seen the following backtrace a lot on 3.6.1:
>> [ 2231.644332] use_block_rsv: 1451 callbacks suppressed
>> [ 2231.645249] btrfs: block rsv returned -28
>
> Yeah this is the last deep dark corner of ENOSPC, we don't quite hold enough
> reserved to handle deleting lots of csums.  Technically this is supposed to be
> taken care of by ye olde global block rsv, but in some cases it's not enough.
> On the bright side if you are just seeing the warnings then we're able to find
> space somewhere and you are a-ok, but it is kind of annoying.  Once I finish my
> fsync stuff I'll go back to this problem and try and figure out a real solution.
> Thanks,

Pretty strange. As this is a freshly created btrfs - added 3 files and i 
was just:
- creating a read only snapshot
- cat file1 >file4
- creating a read only snapshot
- cat file2 >file5
- creating a read only snapshot
- cat file3 >file6
- creating a read only snapshot

nothing else.

Stefan