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Date: Wed, 7 Aug 2002 21:38:01 +0200
To: Gregory Giguashvili <Gregoryg@ParadigmGeo.com>
Cc: "'trond.myklebust@fys.uio.no'" <trond.myklebust@fys.uio.no>,
       "Linux Kernel (E-mail)" <linux-kernel@vger.kernel.org>
Subject: RE: O_SYNC option doesn't work (2.4.18-3)
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From: Trond Myklebust <trond.myklebust@fys.uio.no>
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>>>>> " " == Gregory Giguashvili <Gregoryg@ParadigmGeo.com> writes:

     > File locking, meaning lockd? There are so many problems with
     > file locking in heterogeneous environments that we were moving
     > towards dropping its usage.  Instead, we planned to use some
     > home grown TCP based lock server mechanism.

     > I understand that locking file flushes NFS cache, isn't it? Why
     > can't it be flushed by O_SYNC and "sync" options presence? This
     > would make the life much easier for programmers...

Tough. The above is not part of the O_SYNC spec on any platform and I
have no intention of implementing it.

The sort of thing you would like to do will be possible with O_DIRECT
(which is a design to allow user programs to manage their own
caches). That has yet to be integrated into the standard kernel
though.

Cheers,
  Trond
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