Message-ID: <9524EA4E18D6D2119FEA0008C7C5A006BE4A78@lneis01nok>
From: Peter.Ronnquist@nokia.com
To: peter@cadcamlab.org
Cc: linux-kernel@vger.kernel.org
Subject: RE: shared memory, mmap not recommended?
Date: Tue, 5 Dec 2000 10:02:13 +0200 
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>   [Linus]
> > > (otherwise I'll just end up disabling shared mmap - I 
> doubt anybody
> > > really uses it anyway, but it would be more polite to just support
> > > it).
> 
> [Peter R?nnquist]
> > I was thinking about using mmap for shared mememory in my program,
> > but now I am reconsidering.  Is the System V or Posix mechanism for
> > shared memory a better(it will be supported in 2.4) choice?
> 
> [Peter Samuelson]
> Linus was talking about shared mmap on a file in an smbfs filesystem.
> Rather different from what you are talking about.  For regular shared
> memory, shared mmap should be OK if you actually need backing store
> (i.e. the state you are sharing is persistent).  Often this is not the
> case, in which case POSIX shm might be best.
> 

I see, thanks a lot for the clarification.

BR
Peter R?nnquist
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