Re: Any SMP people out there with SCSI CD ROMs?

Linus Torvalds (torvalds@transmeta.com)
Tue, 9 Jun 1998 22:41:07 -0700 (PDT)


On Wed, 10 Jun 1998, Keith Owens wrote:
>
> CD recorder on ASUS dual P166, pure SCSI. Which version of 105,
> vanilla, ac1, ac2? What symptoms? I'll take a look tonight.

It will happen with all versions, the ac patches don't touch the SCSI
subsystem.

The symptoms are a very noticeable and complete hard lockup, it appears.
Which is extremely easy to believe if something is leaving the
io_request_lock locked (or tries to get it recursively). That would
certainly lock the machine completely.

Which is why I asked for somebody who felt comfortable about spinlocks.
Any help is appreciated, even just reports of how to reliably make this
happen (for all I know it may be limited to just one specific driver), but
let's be careful out there..

Linus

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu