7.0-R freezes with: swap_pager: indefinite wait buffer: bufobj

[Chris St Denis]

I've been getting this in the logs recently on a 6.2 system. No 
stability issues, but it is concerning.

swap_pager: indefinite wait buffer: bufobj: 0, blkno: 93, size: 4096
swap_pager: indefinite wait buffer: bufobj: 0, blkno: 183, size: 4096

The server has always been under heavy load, but the load isn't any 
higher lately. And I'm only using like 1324K of swap so it's not like 
I'm heavily swapping.

It's running off an adaptec based raid and arcconf says it's fine.



Wojciech Puchar wrote:
>> Hi,
>>
>> the SMART-status looks ok!
>>
>> SMART overall-health self-assessment test result: PASSED
>>
>> Maybe other applications causes high I/O load?
>
> no reason to fail.
>
>> Howto determine this? Other suggestions?
>>
>>
>> Cheers,
>> Oskar
>>
>>
>> Kris Kennaway schrieb am 02.06.2008 20:58:
>>> Oskar Eyb wrote:
>>>> Hello,
>>>>
>>>> on a  7.0-RELEASE maschine I have now again a big problem with 
>>>> freezing.
>>>>
>>>>
>>>> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 388449, size: 
>>>> 4096
>>>> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 388452, size: 
>>>> 20480
>>>> swap_pager: indefinite wait buffer: bufobj: 0, blkno: 387805, size: 
>>>> 16384
>>>>
>>>>
>>>> # swapctl -l
>>>> Device:       1024-blocks     Used:
>>>> /dev/mirror/gm0s1b   1048576    485332
>>>> /dev/md0        1048576    485316
>>>>
>>>>
>>>> What to do against this, is there a patch available?
>>>
>>> Your disk is taking an enormously long time to reply to swap I/O, 
>>> which is what is eventually timing out with those errors.  Check 
>>> that it is not failing.
>>>
>>> Kris
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-- 
Chris St Denis
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