From owner-freebsd-hackers@FreeBSD.ORG  Fri Sep 11 17:35:02 2009
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Date: Fri, 11 Sep 2009 13:35:00 -0400
Message-ID: <237c27100909111035y544e8c91hc7726fd6ef16e351@mail.gmail.com>
From: Linda Messerschmidt <linda.messerschmidt@gmail.com>
To: John Baldwin <jhb@freebsd.org>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Intermittent system hangs on 7.2-RELEASE-p1
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On Fri, Sep 11, 2009 at 11:02 AM, John Baldwin <jhb@freebsd.org> wrote:
> Try turning off KTR_LOCK for spin mutexes (just force LO_QUIET on in
> mtx_init() if MTX_SPIN is set)

I have *no* idea what you just said. :)

Which is fine.  But more to the point, I have no idea how to do it. :)

> A more recently schedgraph.py might also
> fix the bugs you were seeing with the idle threads looking too long (esp. at
> the start and end of graphs).

We are already on RELENG_7 due to the KTR-enabling rebuild, so that'd
be the version we're using unless, as Julian observed, it's been fixed
in the past week or so.

Thanks!