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From: Robert Watson <rwatson@freebsd.org>
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To: Garrett Wollman <wollman@lcs.mit.edu>
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Subject: Re: panic: softdep_disk_io_initiation: read
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On Thu, 10 Apr 2003, Garrett Wollman wrote:

> Does this panic look familiar?  I'm stress-testing 5-current by running
> a production news server on it, and this morning I came in to find it
> had crashed.  The source is about a month old (last compiled before I
> went on vacation).  Here's as much of the traceback from DDB as I was
> able to write down: 
> 
> cluster_wbuild(c9e2936c,4000,10,0,2)
> vfs_bio_awrite(d2b37a38,0,c039d00a,8bd,0)
> flushbufqueues(0,0,c039d00a,109,64)
> buf_daemon(...)
> 
> I was unable to continue from the panic to get a proper crash dump. 
> This is the first panic observed on this machine since it was set up
> three weeks ago. 

This looks like the same bug I reported to Jeff Roberson and Kirk a couple
of weeks ago.  I believe Jeff has committed the fix and that it was
vfs_cluster.c revision 1.136.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Network Associates Laboratories