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Re: kern/41417 (WAPBL: hang on tstile)
The following reply was made to PR kern/41417; it has been noted by GNATS.
From: David Holland <dholland-bugs%netbsd.org@localhost>
Subject: Re: kern/41417 (WAPBL: hang on tstile)
Date: Wed, 27 Jul 2011 20:30:43 +0000
On Wed, Jul 27, 2011 at 04:25:02PM +0000, Manuel Bouyer wrote:
>> Another candidate is the weird raidframe throughput problems mrg was
>> seeing and possibly also some of the NFS hangs I was seeing a few
>> weeks ago(*); and maybe some other related phenomena that have been
>> reported. It looks as if maybe there's a problem where under some
>> circumstances callouts stop getting processed... I think there's
>> discussion on tech-kern and it's probably best to look there.
> Actually, callouts are working fine it seems. It looks like it's select
> not being woken up when there's data ready in the socket buffer
It might still be the same problem; it has something to do with missed
wakeups, and the relationship to callouts is roughly half pure
conjecture and the other half guesswork...
David A. Holland
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