Alan Stern wrote:
On Wed, 14 Sep 2005, Anton Blanchard wrote:
Hi,
If that's the cause, it's probably a double down of the host scan
semaphore somewhere in the code. alt-sysrq-t should work in this case,
can you get a stack trace of the blocked process?
It appears to be this patch:
[SCSI] SCSI core: fix leakage of scsi_cmnd's
From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
And in particular it looks like the scsi_unprep_request in
scsi_queue_insert is causing it. The following patch fixes the boot
problems on the vscsi machine:
In general the scsi_unprep_request routine is correct and needs to be
there. The one part that might be questionable is the assignment to
req->special. It may turn out that the real solution is to have
scsi_execute set req->special to NULL; I assumed it would be NULL already
but perhaps I was wrong.
I think we have scsi_execute and friends setting REQ_SPECIAL. This is
could cause a problem becuase it does not have a scsi_request.
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