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SubjectRe: -rc3 regression (was Re: 2.6.25-rc2 + smartd = hang )
On Tuesday 04 March 2008, Bartlomiej Zolnierkiewicz wrote:

> I must admit that after auditing the patch & code for n-th time I still fail
> to see the source of the problem (especialy now that the theory about exposing
> races in the tuning code has also failed) as the _only_ changes introduced by
> the guilty commit are that we are using different rq->cmd_type and testing for
> rq->special instead of rq->buffer but both should be NULL. [ as it can be seen
> be looking at ide_cmd_ioctl(), execute_drive_cmd() and ide_end_drive_cmd() ]
> If anybody has some ideas on what could be wrong please help, in the meantime
> I'm going to take a look at smartd code...

This is getting more interesting as smartd doesn't seem to be using "empty"
HDIO_DRIVE_CMD requests at all!

[ IOW the guilty commit should have zero influence on smartd. ]

Anders, could you send me ide-taskfile.s (make drivers/ide/ide-taskfile.s)
from before and after the commit? Maybe it is simply a compiler bug...


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