Re: 5.3-RELEASE: WARNING - WRITE_DMA interrupt timout - what does it mean?

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