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Date:      Fri, 9 Feb 2001 12:02:16 -0500 (EST)
From:      Andrew Gallatin <gallatin@cs.duke.edu>
To:        Julian Elischer <julian@elischer.org>
Cc:        freebsd-emulation@FreeBSD.ORG
Subject:   Re: What's changed recently with vmware/linuxemu/file I/O
Message-ID:  <14980.8856.555504.633075@grasshopper.cs.duke.edu>
In-Reply-To: <3A8417B3.126F47AB@elischer.org>
References:  <xzpsnlqmh0o.fsf@flood.ping.uio.no> <Pine.NEB.3.96L.1010207220443.19807J-100000@fledge.watson.org> <20010208113519.A789@tao.org.uk> <3A828C2C.F7CDA809@elischer.org> <xzp4ry5gve0.fsf@flood.ping.uio.no> <14979.29437.518299.842853@grasshopper.cs.duke.edu> <14980.2381.849005.313177@grasshopper.cs.duke.edu> <3A8417B3.126F47AB@elischer.org>

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Julian Elischer writes:
 > 
 > I don't like the sound of that hack..
 > are they doing something in Linux to tell Linux to not sync it?

Linux apparently only syncs mmap'ed files when they are closed (or
when it is under memory pressure). Eg, linux treats every mmap'ed file
as MAP_NOSYNC.

My hacks currently don't sync it on close, this is a problem.
However, I think this could be fixed...

 > I nkow it's gross but could we only do that hack if it'a vmware? 
 > 
 > (probably should be on -emulation)

Agreed.  I just put it there & trimmed the CC's.

Drew


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