5.3-RELEASE: WARNING - WRITE_DMA interrupt timout - what does
it mean?
Søren Schmidt
sos at DeepCore.dk
Wed Nov 10 23:46:48 PST 2004
Frode Nordahl wrote:
> On Nov 10, 2004, at 09:11, Søren Schmidt wrote:
>
>> Zoltan Frombach wrote:
>>
>>> I just upgraded to 5.3-RELEASE a few days ago. This morning this line
>>> got into my system log file:
>>> Nov 9 06:14:03 www kernel: ad0: WARNING - WRITE_DMA interrupt was
>>> seen but timeout fired LBA=2491143
>>> I've never seen this message before. Can someone please explain what
>>> it means? With Thanks,
>>
>>
>> It means that the disk has processed the write request (interrupt
>> seen), but that the system (the bio_taskqueue) hasn't been able to get
>> the result returned to the kernel.
>>
>> Your disk is not involved in this problem since it has done its part,
>> but the rest of the system is either busy with something else, or
>> there are bugs lurking that prohibits the bio_taskqueue from running.
>>
>> Either way its a WARNING not a FAILURE :)
>
>
> This triggered my attention :-)
>
> I have a server still running on 5.3-BETA1, with a (not very busy) MySQL
> server, and it bails out with this message when the above mentioned
> "warning" occurs in dmesg.
>
> 041109 22:26:18 InnoDB: Operating system error number 5 in a file
> operation.
> InnoDB: Starting recovery from log files...
>
> (5 == EIO?)
I was talking 5.3R or -current..
--
-Søren
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