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RE: XenVif div by zero on Tx path after resume.
- To: "paul@xxxxxxx" <paul@xxxxxxx>, "win-pv-devel@xxxxxxxxxxxxxxxxxxxx" <win-pv-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Martin Harvey <martin.harvey@xxxxxxxxxx>
- Date: Fri, 22 Apr 2022 14:17:46 +0000
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- Thread-topic: XenVif div by zero on Tx path after resume.
-----Original Message-----
From: Durrant, Paul <xadimgnik@xxxxxxxxx>
Sent: 22 April 2022 15:13
To: Martin Harvey <martin.harvey@xxxxxxxxxx>; paul@xxxxxxx;
win-pv-devel@xxxxxxxxxxxxxxxxxxxx
Subject: Re: XenVif div by zero on Tx path after resume.
> ... and unfortunately it seems to have been broken for so long my git history
> won't tell me when :-(
Oh dear. Possibly one of those "how did it ever work?" bugs.
If you need testing resource / validation for any patches you'd like to throw
my way, I do have a v. good set of automates test cases which will repro the
bug (after about 12 hours of CPU grinding), and check that most obvious things
aren't broken.
IRQL is such a nightmare: You can get it wrong in one place and the subtly
broken CPU state then dies in the next piece of code that needs some level of
atomicity.
MH.
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