*groan* I'm having trouble believing that *config* of all things is now
dependent on time to avoid bugs... This is *one* for the books....
On Mon, 29 Jan 2001, Peter Wemm wrote:
> Bruce Evans wrote:
> > On Mon, 29 Jan 2001, Peter Wemm wrote:
> >
> > > Bruce Evans wrote:
> > > > Config now removes almost all headers:
> > > > ...
> > > > This is starting from compile directory populated by a previous version
> > > > of config. Starting from scratch, config seems to work for the first
> > > > run. The second run complains about all headers, deletes them all, and
> > > > doesn't create any. The third run seems to work...
> > >
> > > What are the chances that you did this on a mount -o noatime file system?
> >
> > Very high :-).
>
> Heh. :-)
>
> > I'm surprised the bug doesn't affect fast machines, since config doesn't
> > seem to sleep for >= 1 second to ensure that the atimes advance with
> > the standard mount options.
>
> I was primarily testing it on a dual P3-733 w/ 1G ram which was running
> config nearly instantly. I never saw this problem until I tested it
> on a fresh machine that (by sheer chance) happened to be running noatime (it
> was a laptop). For what it's worth, I did roll the start time back by one
> second to give a bit more comfort - getting rid of the trays isn't all that
> critical.
>
> For UFS at least, we seem to update the atime instantly but schedule
> writeback to the inode "whenever".
>
> 148# date ; ls -lutT foo1 ; cat foo1 ; ls -lutT foo1; date
> Mon Jan 29 08:18:02 PST 2001
> -rw-r--r-- 1 root wheel 4 Jan 29 08:16:25 2001 foo1
> foo
> -rw-r--r-- 1 root wheel 4 Jan 29 08:18:02 2001 foo1
> Mon Jan 29 08:18:02 PST 2001
>
> This is all within the same second "tick" and the atime change was visible.
>
> > Bruce
>
>
> Cheers,
> -Peter
> --
> Peter Wemm - [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]
> "All of this is for nothing if we don't go to the stars" - JMS/B5
>
>
>
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