Date: Wed, 29 Jan 2014 20:00:18 +0100 From: Hans Petter Selasky <hps@bitfrost.no> To: Garrett Wollman <wollman@csail.mit.edu>, freebsd-stable@freebsd.org, freebsd-scsi@freebsd.org Cc: scottl@freebsd.org, ken@freebsd.org Subject: Re: stable/9 mps(4) rev 254938 == BOOM! Message-ID: <52E94FC2.1010901@bitfrost.no> In-Reply-To: <21225.19508.683025.581620@khavrinen.csail.mit.edu> References: <21225.19508.683025.581620@khavrinen.csail.mit.edu>
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On 01/29/14 19:45, Garrett Wollman wrote:
> I've been trying to puzzle out why the USB stack hits a GPF during
> boot on 9-stable on one of my machines (which runs 9.2 just fine), and
> by trial and error I've found that it is actually caused by r254938,
> which is a mega-MFC of mps(4) driver changes, even though the fault
> always occurs at the same place in a harmless USB subroutine. Details
> below; config available on request.
>
> -GAWollman
Hi,
To me this sounds like someone is writing outside their assigned area.
options DEBUG_REDZONE
Maybe some change that should have been MFC'ed did not get MFC'ed.
I think you can copy the mps driver from -current just keeping the
following deltas intact:
-
- if (curthread->td_no_sleeping != 0)
+
+ if(curthread->td_pflags & TDP_NOSLEEPING)
sleep_flags = NO_SLEEP;
--HPS
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