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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