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Re: Data loss XFS with RT kernel on Debian.

To: xfs@xxxxxxxxxxx
Subject: Re: Data loss XFS with RT kernel on Debian.
From: Jan de Kruyf <jan.de.kruyf@xxxxxxxxx>
Date: Mon, 7 Jul 2014 09:59:53 +0200
Delivered-to: xfs@xxxxxxxxxxx
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I tend to agree with Dave that is is an RT problem, however just for your info:

Kernel 3.2 (the stock Debian kernel) works in both versions, the plain
vanilla and the RT.
On Debugging this prob: will it be helpful for any of the parties
involved if I rig up a serial link and try to get a stacktrace of all
processes with SysRq ? Does that also give kernel processes? Cause Top
tells me nothing.
( I am a bit fresh to this but willing to try)



On Mon, Jul 7, 2014 at 1:57 AM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
> On Sat, Jul 05, 2014 at 02:41:06PM +0200, Jan de Kruyf wrote:
>> Hallo,
>> While doing a reasonably high density job like rsynching a subdirectory
>> from one place to another, or tarring it to a pipe and untarring it at the
>> other end, I note that the cpu usage goes practically to 100% and when I
>> after 5 minutes or so I reset the computer the writing has not finished at
>> all.
>> However on the stock Debian kernel it works without a problem.
> Which says that it's a RT kernel problem, not an XFS issue. There
> have been other recent reports of issues with RT kernels, and they
> have proven to be core RT kernel bugs, not filesystem issues. I'd
> suggest that you are likely to be seeing the same RT issues....
> Cheers,
> Dave.
> --
> Dave Chinner
> david@xxxxxxxxxxxxx

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