mtime updates for mmapped files.

[Rogier Wolff]

Hi,

I  wrote a small app yesterday that updates a file by mmapping the 
file (RW), changing the thing around, and then exiting. 

This did not trigger a change in the mtime of the file. Thus rsync
didn't pick up that the file had changed.

I understand that tracking every change to a RW mmapped file is
costly, and thus unfeasable, but shouldn't then the close cause a
mtime update?

The server where this happened is running 2.6.21, so my apologies if
this has already been corrected.

	Roger. 

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