RE: [PATCH] 4/4 block: explicit plugging
From: Chen, Kenneth W
Date: Wed Jan 03 2007 - 17:35:04 EST
Jens Axboe wrote on Wednesday, January 03, 2007 2:30 PM
> > We are having some trouble with the patch set that some of our fiber channel
> > host controller doesn't initialize properly anymore and thus lost whole
> > bunch of disks (somewhere around 200 disks out of 900) at boot time.
> > Presumably FC loop initialization command are done through block layer etc.
> > I haven't looked into the problem closely.
> >
> > Jens, I assume the spin lock bug in __blk_run_queue is fixed in this patch
> > set?
>
> It is. Are you still seeing problems after the initial mail exchange we
> had prior to christmas,
Yes. Not the same kernel panic, but a problem with FC loop reset itself.
> or are you referencing that initial problem?
No. we got passed that point thanks for the bug fix patch you give me
prior to Christmas. That fixed a kernel panic on boot up.
> It's not likely to be a block layer issue, more likely the SCSI <->
> block interactions. If you mail me a new dmesg (if your problem is with
> the __blk_run_queue() fixups), I can take a look. Otherwise please do
> test with the __blk_run_queue() fixup, just use the current patchset.
I will just retake the tip of your plug tree and retest.
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