Re: Memory mapped files question

["H. Peter Anvin" <hpa@zytor.com>]

Followup to:  <004301c302bd$ed548680$fe64a8c0@webserver>
By author:    "Bryan Shumsky" <bzs@via.com>
In newsgroup: linux.dev.kernel
>
> Hi, everyone.  Thanks for all your responses.  Our confusion is that in Unix
> environments, when we modify memory in memory-mapped files the underlying
> system flusher manages to flush the files for us before the files are
> munmap'ed or msysnc'ed.
> 

Bullshit.  It might work on one particular Unix implementation, but
the definition of Unix, the Single Unix Standard, does explicitly
*not* require this behavior.

> Rewriting all of our code to manually handle the flushing is a MAJOR
> undertaking, so I was hoping there might be some sneaky solution you could
> come up with.  Any ideas?

Your code is fundamentally broken.  You need to fix it.

	-hpa

-- 
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"Unix gives you enough rope to shoot yourself in the foot."
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