Re: kernel BUG() hit during PCI testing

[Jeff Mahoney <jeffm@suse.com>]

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Linas Vepstas wrote:
> HI,
> 
> On Tue, May 10, 2005 at 12:25:01PM -0400, Jeff Mahoney was heard to remark:
>>This one is on my radar among several others of the same type. What's
>>happening is that somehow buffers are getting dirtied despite not being
>>uptodate. They're getting allowed to be put back into the write cycle
>>which is totally invalid, so they're getting caught rather than being
>>written to disk. ext3 has similar problems, but tends to handle them as
>>buffer errors rather than BUGs. I'm investigating whether or not these
>>errors could occur outside individual filesystems.
> 
> OK, if I don't get busy with other things, I'll look more closely at
> this as well. Maybe :-/    Meanwhile here's the dmesg output between
> the pci outage and the crash.  Don't know if this will be useful.
> If you want any kind of tracing turned on, let me know.

It should be just a matter of performing an audit of where these buffers
are getting re-introduced into the write cycle. I don't really need any
more data points, I've got quite a bit already from various reports.
Thanks though.

- -Jeff

- --
Jeff Mahoney
SuSE Labs
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