Btrfs devel - Aug 2011 - space cache generation (...) does not match inode (...)

I''ve always gotten space cache generation warnings, but some time
after 3.0 they started going nuts.  I get:

space cache generation (14667727114112179905) does not match inode (154185)

and other similar messages (with a huge number and a smaller number)
at rates higher than one message per ms.  They don''t happen
constantly, but they come in bursts big enough to fill my log buffer.

--Andy
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On 08/06/2011 10:16 PM, Andrew Lutomirski wrote:
> I''ve always gotten space cache generation warnings, but some time
> after 3.0 they started going nuts.  I get:
> 
> space cache generation (14667727114112179905) does not match inode (154185)
> 
> and other similar messages (with a huge number and a smaller number)
> at rates higher than one message per ms.  They don''t happen
> constantly, but they come in bursts big enough to fill my log buffer.
> 
Yeah sorry that''s going to happen when you first switch to 3.0.  We
switched the space cache stuff over to using the normal checksumming
code so all old space cache is going to look invalid.  This is nothing
to worry about, it will just end up discarded and re-generated.  Thanks,

Josef
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On Mon, Aug 8, 2011 at 8:14 AM, Josef Bacik <josef@redhat.com>
wrote:
> On 08/06/2011 10:16 PM, Andrew Lutomirski wrote:
>> I''ve always gotten space cache generation warnings, but some
time
>> after 3.0 they started going nuts.  I get:
>>
>> space cache generation (14667727114112179905) does not match inode
(154185)
>>
>> and other similar messages (with a huge number and a smaller number)
>> at rates higher than one message per ms.  They don''t happen
>> constantly, but they come in bursts big enough to fill my log buffer.
>>
>
> Yeah sorry that''s going to happen when you first switch to 3.0.
 We
> switched the space cache stuff over to using the normal checksumming
> code so all old space cache is going to look invalid.  This is nothing
> to worry about, it will just end up discarded and re-generated.  Thanks,
Can you put in a rate limit and make the message less alarming?
There''s enough log spam from it that I can''t see anything else
in my
log.

--Andy
>
> Josef
>
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On 08/08/2011 08:17 AM, Andrew Lutomirski wrote:
> On Mon, Aug 8, 2011 at 8:14 AM, Josef Bacik <josef@redhat.com> wrote:
>> On 08/06/2011 10:16 PM, Andrew Lutomirski wrote:
>>> I''ve always gotten space cache generation warnings, but
some time
>>> after 3.0 they started going nuts.  I get:
>>>
>>> space cache generation (14667727114112179905) does not match inode
(154185)
>>>
>>> and other similar messages (with a huge number and a smaller
number)
>>> at rates higher than one message per ms.  They don''t
happen
>>> constantly, but they come in bursts big enough to fill my log
buffer.
>>>
>>
>> Yeah sorry that''s going to happen when you first switch to
3.0.  We
>> switched the space cache stuff over to using the normal checksumming
>> code so all old space cache is going to look invalid.  This is nothing
>> to worry about, it will just end up discarded and re-generated. 
Thanks,
> 
> Can you put in a rate limit and make the message less alarming?
> There''s enough log spam from it that I can''t see anything
else in my
> log.
> 
Yeah I''ll do that now, thanks,

Josef
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Hi Josef,

Am Montag, 8. August 2011 schrieb Josef Bacik:
> On 08/06/2011 10:16 PM, Andrew Lutomirski wrote:
> > I''ve always gotten space cache generation warnings, but some
time
> > after 3.0 they started going nuts.  I get:
> > 
> > space cache generation (14667727114112179905) does not match inode
> > (154185)
> > 
> > and other similar messages (with a huge number and a smaller number)
> > at rates higher than one message per ms.  They don''t happen
> > constantly, but they come in bursts big enough to fill my log buffer.
> 
> Yeah sorry that''s going to happen when you first switch to 3.0. 
We
> switched the space cache stuff over to using the normal checksumming
> code so all old space cache is going to look invalid.  This is nothing
> to worry about, it will just end up discarded and re-generated. 
I found these too and found this thread about it.

Now I restarted 3.1 another time but I still get these. Less than before, 
but they still appear. Is that okay?

I thought BTRFS would update the space cache once and then be done with 
it. When exactly should BTRFS be done with it?

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