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Date: Mon, 16 Jun 2003 16:09:51 +1000
From: Tim Robbins <tjr@FreeBSD.ORG>
To: Chris Shenton <chris@shenton.org>
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References: <87of0y3l98.fsf@PECTOPAH.shenton.org>
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	from chris@shenton.org on Sun, Jun 15, 2003 at 08:43:15PM -0400
cc: current@freebsd.org
Subject: Re: qmail uses 100% cpu after FreeBSD-5.0 to 5.1 upgrade
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On Sun, Jun 15, 2003 at 08:43:15PM -0400, Chris Shenton wrote:

> I've been running qmail for years and like it, installed pretty much
> per www.LifeWithQmail.org.  My main system was running FreeBSD
> 5.0-RELEASE and -CURRENT and qmail was fine.  When I just upgraded to
> 5.1-CURRENT a couple days back, the qmail-send process started using
> all CPU.

This looks like a bug in the named pipe code. Reverting
sys/fs/fifofs/fifo_vnops.c to the RELENG_5_0 version makes the problem go
away. I haven't tracked down exactly what change between RELENG_5_0 and
RELENG_5_1 caused the problem.


Tim