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From: "Brian F. Feldman" <green@FreeBSD.org>
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Subject: Re: cvs commit: src/sys/kern vfs_bio.c 
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Kirk McKusick <mckusick@FreeBSD.org> wrote:
> mckusick    2003/11/03 22:30:01 PST
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/kern             vfs_bio.c 
>   Log:
>   Allow the bufdaemon and update daemon processes to skip the
>   waitrunningbufspace() calls so that they are always able to
>   proceed and clean up buffer space.

This will fix at least some of any deadlocks you may be seeing with md(4) or 
similar devices, totally unrelated to hardware.

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green@FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\