Re: 2.4.20-pre7-ac3 IDE taskfile io woes

[Alan Cox]

On Mon, 2002-09-30 at 06:10, Paul Cassella wrote:
> I experienced severe performance disruptions followed by what appeared to
> be a system hang twice.  Before that, I was recieving an "hdd: lost
> interrupt"  message every few hours, and the system felt sluggish.  (The
> ide-scsi device is hdc, not hdd.)  I have not had these problems with a
> kernel compiled without taskfile io.

taskfile I/O write is broken and loses IRQ's. Non taskfile I/O write
should be fine. Thats one of the known problems that needs debugging

> 11:42:29 bug: kernel timer added twice at c01b0107.

Thats always a bug.

> 
> c01b00b8 T ide_set_handler
> c01b0110 t atapi_reset_pollfunc
> 
> 11:45:35 scsi0 channel 0 : resetting for second half of retries.
> 11:45:35 SCSI bus is being reset for host 0 channel 0.
> 11:45:35 hdd: ide_set_handler: handler not null; old=c01b0110, new=c01b1474

We ended up trying to add a handler before we had finished getting rid
of the previous one.