Re: Linux 2.6.25-rc4

[Jens Axboe]

On Sun, Mar 16 2008, Bartlomiej Zolnierkiewicz wrote:
> On Sunday 16 March 2008, Bartlomiej Zolnierkiewicz wrote:
> 
> [...]
> 
> > I think that we are looking into completely wrong direction...
> 
> Alt-SysRq-T traces that Anders posted shows that the system hangs inside
> block layer, if not clearing DRQ would be the case we should see system
> getting stuck inside IDE (or at least IDE commands timing out)...

The bisect ends up pointing at IDE bits everytime, plus it's io
scheduler independent. So I don't think a generic issue is very likely.

> I really do think that it is the same hang-in-block-layer issue that
> Ingo managed to hit once (his system was using libata)...

There's no data to back any such conclusion up, that would be extremely
hand wavy (at best).

Ingo hit a hang in one boot out of hundreds to thousands. Anders can
reproduce easily, should be easy enough to narrow down.

-- 
Jens Axboe

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