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Date:      Mon, 16 Jun 2003 16:37:02 +1000
From:      Tim Robbins <tjr@freebsd.org>
To:        Chris Shenton <chris@shenton.org>
Cc:        current@freebsd.org
Subject:   Re: qmail uses 100% cpu after FreeBSD-5.0 to 5.1 upgrade
Message-ID:  <20030616163701.A56231@dilbert.robbins.dropbear.id.au>
In-Reply-To: <20030616160951.A29962@dilbert.robbins.dropbear.id.au>; from tjr@freebsd.org on Mon, Jun 16, 2003 at 04:09:51PM %2B1000
References:  <87of0y3l98.fsf@PECTOPAH.shenton.org> <20030616160951.A29962@dilbert.robbins.dropbear.id.au>

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On Mon, Jun 16, 2003 at 04:09:51PM +1000, Tim Robbins wrote:

> 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.

Looks like revision 1.86 works, but it stops working with 1.87. Moving the
soclose() calls to fifo_inactive() may have caused it.


Tim



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