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Date: Thu, 11 Nov 2004 08:45:55 +0100
From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk>
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To: Frode Nordahl <frode@nordahl.net>
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cc: Zoltan Frombach <tssajo@hotmail.com>
cc: freebsd-current@freebsd.org
Subject: 
 Re: 5.3-RELEASE: WARNING - WRITE_DMA interrupt timout - what does
 it	mean?
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Frode Nordahl wrote:
> On Nov 10, 2004, at 09:11, S=F8ren Schmidt wrote:
>=20
>> Zoltan Frombach wrote:
>>
>>> I just upgraded to 5.3-RELEASE a few days ago. This morning this line=
=20
>>> got into my system log file:
>>> Nov  9 06:14:03 www kernel: ad0: WARNING - WRITE_DMA interrupt was=20
>>> seen but timeout fired LBA=3D2491143
>>> 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=20
>> seen), but that the system (the bio_taskqueue) hasn't been able to get=
=20
>> 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=20
>> there are bugs lurking that prohibits the bio_taskqueue from running.
>>
>> Either way its a WARNING not a FAILURE :)
>=20
>=20
> This triggered my attention :-)
>=20
> I have a server still running on 5.3-BETA1, with a (not very busy) MySQ=
L=20
> server, and it bails out with this message when the above mentioned=20
> "warning" occurs in dmesg.
>=20
> 041109 22:26:18  InnoDB: Operating system error number 5 in a file=20
> operation.
> InnoDB: Starting recovery from log files...
>=20
> (5 =3D=3D EIO?)

I was talking 5.3R or -current..


--=20

-S=F8ren