atimes of binaries not properly updated

[Dionysus Blazakis]

On Mon, May 19, 2008 at 2:26 PM, Simon 'corecode' Schubert
<corecode at fs.ei.tum.de> wrote:
> Hey,
>
> something is wrong with our atimes update:
>
> % stat -x `which mplayer`
>  File: "/usr/pkg/bin/mplayer"
>  Size: 21084730     FileType: Regular File
>  Mode: (0555/-r-xr-xr-x)         Uid: (    0/    root)  Gid: (    0/ wheel)
> Device: 91,3   Inode: 579162    Links: 1
> Access: Fri May  2 01:00:44 2008
> Modify: Wed Apr 30 00:16:03 2008
> Change: Wed Apr 30 00:16:03 2008
>
> But I'm sure I watched MacGyver yesterday night, with mplayer.  Maybe it was
> in the buffer cache since May 2nd and thus was not updated?  Actually
> running mplayer right now (after reboot) does not update the atime either.

I took a look and it seems like bumping atime on a execve or mmap was
never done.  The other BSDs and Linux _do_.  I took a shot at a patch.
 It is based on FBSD.

The patch against HEAD is at:
http://dblaz.beevomit.org/dfly/atime.patch

I wasn't sure if the atime update in mmap should happen further below
or not.  Also, not sure if I had to mess with vnode locking in
kern_exec -- please let me know.

-- Dion

Ah, and I just thought that maybe our stat(2) man page should be
updated to add execve and mmap in the atime blurb.

>
> cheers
>  simon
>
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