Re: [MC] [CHECKER] Need help on mmap on FUSE (linux user-land file system)

From: Miklos Szeredi
Date: Mon Mar 14 2005 - 05:23:31 EST

> > Forget to mention, we are checking linux 2.6. It appears to us
> > that mmap doesnt' work for FUSE in linux 2.6.
> IIRC, the reason mmap doesn't work on FUSE is because when it
> dirties pages they cannot be flushed reliably, because writing them
> out involves calling a userspace process which may allocate RAM,
> etc.

Yes. To be precise this only affects writable shared mmap(), which is
not used by the great majority of applications. Any other kind of
memory mapping should work OK.

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