adventures in booting
Daniel Veillard
veillard at redhat.com
Thu Dec 2 23:40:06 UTC 2004
On Thu, Dec 02, 2004 at 04:59:49PM -0500, Colin Walters wrote:
> On Thu, 2004-12-02 at 16:38 -0500, Daniel Veillard wrote:
>
> > 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.
>
> It has an atomic rename for files; but you can't atomically change a
> directory that has content. Or am I missing something? Not to mention
> this would break things like RPM verification.
I think you're missing something. It is possible to copy the file
somewhere else and then rename it to the original name, then update
the m_time and rpm -Va should not say anything, the checksum and file
system attributes should look alike.
The copy to a single new directory is a trick to force allocation
in the same filesystem zone (if the FS has zones).
Daniel
--
Daniel Veillard | Red Hat Desktop team http://redhat.com/
veillard at redhat.com | libxml GNOME XML XSLT toolkit http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/
More information about the fedora-devel-list
mailing list