Re: [PATCH][RFC][BUG] updating the ctime and mtime time stamps in msync()

Klaus S. Madsen
2008-01-09T21:25:07Z

On Wed, Jan 09, 2008 at 15:50:15 -0500, Rik van Riel wrote:
> > Specifically, the ctime and mtime time stamps do change
> > when modifying the mapped memory and do not change when
> > there have been no write references between the mmap()
> > and msync() system calls.
>
> As long as the ctime and mtime stamps change when the memory is
> written to, what exactly is the problem?

A "not" is missing from the sentence above. The quote above should have
read:

> > Specifically, the ctime and mtime time stamps do _not_ change when
> > modifying the mapped memory and do not change when there have been
> > no write references between the mmap() and msync() system calls.

So essentially the problem is that mtime stamps are _never_ changed when
the file is only modified through mmap. Not even when calling msync().

--
Kind regards,
Klaus S. Madsen