On Tue, Oct 15, 2013 at 10:14:13AM -0400, Paul Wouters wrote: > On Tue, 15 Oct 2013, Dhiru Kholia wrote: > > >In short, we could not distinguish the performance gains of prelink over > >the "background noise" in many (or even most) cases. > > > >So, I was wondering if you are aware of any use-cases where prelink > >provides measurable benefits. In would be awesome if you could run > >"unSPEC" on your systems and report back the numbers. > > Please take prelink behind the barn and shoot it. Thanks. > > Every year people point out how obsoleted it is, yet we can't get seem > to rid of it. > > The amount of time I've wasted on prelink in combination with FIPS is > something another decade of prelink speed gains isn't going to compensate > me for. I think /etc/prelink.conf.d along with the cron job and its > sysconfig override is an overengineered solution (and ugly because any > blacklist package has to own the directory of prelink too) > > How can we have this discussion? We have had reports of numbers showing > no real gain. We know it affects ASLR negatively and complicates FIPS > engineering. > > Why haven't we at least reached a compromise where prelink is _optional_ > and not installed per default? It seems currently to be part of the > fedora live install (and the rhel workstation installs) This mail is just a pre-cursor to proposing it be removed. When prelink was added by default, the justification was the performance benefits to startup. To justify removing it, we just need to collect data to show that those performance benefits no longer exist, with current hardware and software combination in Fedora. That is what this email thread is seeking to confirm. So assuming no one comes forward to show some incredible benefit(s) of prelink, a proposal to kill it by default will surely follow. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
