Re: [PATCH 2.6.19] ehca: bug fix: use wqe offset instead wqe address to determine pending work requests

• To: Hoang-Nam Nguyen <[email protected]>
• Subject: Re: [PATCH 2.6.19] ehca: bug fix: use wqe offset instead wqe address to determine pending work requests
• From: Roland Dreier <[email protected]>
• Date: Wed, 22 Nov 2006 15:04:01 -0800
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• In-reply-to: <[email protected]> (Hoang-Nam Nguyen's message of "Wed, 22 Nov 2006 10:29:09 +0100")
• References: <[email protected]> <[email protected]> <[email protected]>
• Sender: [email protected]
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 > We found this bug actually through a code review by random. Since
 > (un)fortunately the queue pages were layouted in order, we've not
 > seen it earlier. It's certainly a bug and can cause kernel panic 
 > if above observation is not met, probably in stress situation
 > of system. That means the "former" code accesses next page that 
 > it has not allocated.

OK.  After thinking about this, I'm going to queue it for 2.6.20 --
we're _way_ too close to the 2.6.19 final release to put in patches
that aren't either small and obvious, or fix a problem someone hit in
real life.

 - R.
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    • From: Hoang-Nam Nguyen <[email protected]>
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    • From: Roland Dreier <[email protected]>
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