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Date:      Fri, 22 Apr 2005 11:35:22 -0400
From:      Brian Fundakowski Feldman <green@FreeBSD.ORG>
To:        Garrett Wollman <wollman@csail.mit.edu>
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: NFS client/buffer cache deadlock
Message-ID:  <20050422153522.GN1157@green.homeunix.org>
In-Reply-To: <17001.6159.521697.442481@khavrinen.csail.mit.edu>
References:  <20050419204723.GG1157@green.homeunix.org> <20050420140409.GA77731@stack.nl> <20050420142448.GH1157@green.homeunix.org> <20050420143842.GB77731@stack.nl> <20050420152038.GI1157@green.homeunix.org> <20050420153528.GC77731@stack.nl> <20050420155233.GJ1157@green.homeunix.org> <16998.37222.529748.205885@khavrinen.csail.mit.edu> <20050422150835.GM1157@green.homeunix.org> <17001.6159.521697.442481@khavrinen.csail.mit.edu>

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On Fri, Apr 22, 2005 at 11:28:15AM -0400, Garrett Wollman wrote:
> <<On Fri, 22 Apr 2005 11:08:35 -0400, Brian Fundakowski Feldman <green@FreeBSD.ORG> said:
> 
> 
> > Can you find any evidence that it's acceptable to interleave multiple
> > writers that are doing O_APPEND?  At best, to do what you're asking,
> > they could be kept from being interleaved from the context of one
> > specific NFS client host...
> 
> As far as POSIX goes, the standard says that applications are expected
> to handle serialization.  It makes no exception for O_APPEND.

Then let's fix IO_UNIT so the existing code can DTRT.

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



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