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From: John Baldwin <jhb@freebsd.org>
To: src-committers@freebsd.org
Subject: Re: svn commit: r276065 - head/sys/dev/ipmi
Date: Mon, 22 Dec 2014 12:19:32 -0500
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On Monday, December 22, 2014 11:53:05 am John Baldwin wrote:
> Author: jhb
> Date: Mon Dec 22 16:53:04 2014
> New Revision: 276065
> URL: https://svnweb.freebsd.org/changeset/base/276065
> 
> Log:
>   Explicitly treat timeouts when waiting for IBF or OBF to change state as an
>   error.  This fixes occasional hangs in the IPMI kcs thread when using
>   ipmitool locally.

In particular, the ipmi0: kcs thread would run at 100% CPU.  With this fix in
place I know see a KCS error reported in dmesg and the driver recovers allowing
future requests to complete ok.

-- 
John Baldwin