From owner-freebsd-geom@FreeBSD.ORG  Tue Jul 27 09:03:48 2010
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To: Alexander Motin <mav@FreeBSD.org>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Tue, 27 Jul 2010 10:58:20 +0300."
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Date: Tue, 27 Jul 2010 08:46:03 +0000
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Cc: freebsd-geom@FreeBSD.org
Subject: Re: Hyperactive g_event thread 
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In message <4C4E919C.2060009@FreeBSD.org>, Alexander Motin writes:

>The only reason for doing it I
>see in imperfect locking of g_run_events() loop and respective
>tsleep()/wakeup(). So timeout there may be needed for collection
>potentially lost wakeup() events.

Back when GEOM was written, the kernels SMP facilites were rather
rudimentary and in a few cases downright buggy, so workarounds
like that timeout were employed.

They can hopefully safely be removed now.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.