Re: adventures in booting

[Daniel Veillard <veillard redhat com>]

On Thu, Dec 02, 2004 at 01:25:39PM -0500, Colin Walters wrote:
> On Thu, 2004-12-02 at 11:58 -0500, Daniel Veillard wrote:
> > On Thu, Dec 02, 2004 at 11:48:56AM -0500, David Zeuthen wrote:
> > > Not sure; the big boost really comes from reordering the files on the
> > > filesystem - running readahead (which takes 11 seconds) only gives me a
> > 
> >   I'm looking into this. a mix of creating a new directory, copying
> > the file there, then unlinking, linking and unlinking the new copies to the
> > old name is more likely to help. 
> 
> Eek.  So what happens if I install an RPM while this is happening, or

  I don't expect this to happen in multiuser.

> prelink runs, or...?  I think the caching should clearly go in the
> kernel; anything else is going to have serious race conditions in some
> form.

  If the kernel has an atomic rename system call then it can be done
without race, if not that will be a very serious issue.

Daniel

-- 
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