Messages in this thread | | | Subject | Re: [patch 01/22] update ctime and mtime for mmaped write | From | Miklos Szeredi <> | Date | Wed, 28 Feb 2007 21:58:54 +0100 |
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> What happens if the application overwrites what it had written some > time later? Nothing. The page is already read-write, the pte dirty, > so even though the file was clearly modified, there's absolutely no > way in which this can be used to force an update to the timestamp.
Which, I realize now, actually means, that the patch is wrong. Msync will have to write protect the page table entries, so that later dirtyings may have an effect on the timestamp.
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