Date: Mon, 24 Oct 2005 11:10:42 -0700 From: Frank Mayhar <frank@exit.com> To: Dan Rue <drue@therub.org> Cc: freebsd-stable@freebsd.org, Vinod Kashyap <vkashyap@amcc.com> Subject: Re: twa kernel panic under heavy IO Message-ID: <1130177442.25279.6.camel@realtime.exit.com> In-Reply-To: <20051024161342.GI38097@therub.org> References: <2B3B2AA816369A4E87D7BE63EC9D2F26C621CC@SDCEXCHANGE01.ad.amcc.com> <20051024161342.GI38097@therub.org>
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On Mon, 2005-10-24 at 11:13 -0500, Dan Rue wrote:
> At one point, I received the following error message just before the
> machine locked up:
>
> >Oct 12 11:36:13 leopard kernel: initiate_write_filepage: already started
>
> I grepped for that error message in the freebsd kernel source, and found
> it in sys/ufs/ffs/ffs_softdep.c on line 3580. What makes it really
> interesting is the comment above where the error is thrown:
>
> if (pagedep->pd_state & IOSTARTED) {
> /*
> * This can only happen if there is a driver that does not
> * understand chaining. Here biodone will reissue the call
> * to strategy for the incomplete buffers.
> */
> printf("initiate_write_filepage: already started\n");
> return;
> }
Fascinating. This is the same message I saw with the panic I reported
in kern/87861. I'll bet that your wedges and my panics are related
somehow. Unfortunately mine are not fixed in 6.0.
--
Frank Mayhar frank@exit.com http://www.exit.com/
Exit Consulting http://www.gpsclock.com/
http://www.exit.com/blog/frank/
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