Re: Any SMP people out there with SCSI CD ROMs?
Charlie Hedlin (email@example.com)
Wed, 10 Jun 1998 09:28:32 -0500
Linus Torvalds wrote:
> 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
> 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..
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I had previously considered the occurance of this on my system to be my
own fault, as it is not setup that well. I have an SMP mb, but haven't
gotten around to the second proccesor yet, but I have an SMP kernel. I
have a mixture of SCSI and IDE, with my CD's on IDE running under SCSI
emulation for my CD writer. I have had no problems writing, but when I
read CD audio I run a chance of locking my machine hard as described.
I can't debug the problem, but I hope this information may help.
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