RE: [PATCH] fix for BZ 8426 - massive slowdown on SCSI CD/DVDdriveconnected to mptspi driver

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On Thu, 2007-05-31 at 09:40 -0600, Moore, Eric wrote:
> James -   I obtained a log from Doug (attached), and the firmware is
> returning BUSY, so your correct.  That will end up as a ADD_TO_MLQUEUE
> disposition.   Does the mid-layer throttle back the queue when a device
> returns busy, I don't know?    I still believe that the lld shouldn't
> report that a device supports tagged when it really doesn't.    I hope
> you will consider this patch, if not, let me know how to proceed.

Sorry, yes ... I should have said that the patch is correct and I'll put
it in 2.6.22

However, since we have such a wonderful example of the failing case, I'd
like to try to correct the root cause, if I may.  Doug, would you be
amenable to testing out a few patches for me?

James


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