prelink fragments the files

[Jérôme]

Binary package hint: prelink

The below command shows that the file fragmentation increases after the first activation of prelink:
sudo find / -xdev -type f -exec filefrag '{}' \; | grep -v "[01] extent"

I activated prelink by setting "yes" in /etc/default/prelink and running the /etc/cron.daily/prelink task.

Why not reallocating the whole file when its content is changed ? Moreover it would also defragment the files which were previously fragmented.

Since the goal of prelink is to speedup the applications launch I think that reallocating the file blocks isn't out of the scope of prelink.

ProblemType: Bug
Architecture: i386
Date: Wed Oct 28 17:38:55 2009
DistroRelease: Ubuntu 9.10
Package: prelink (not installed)
ProcEnviron:
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: prelink
Uname: Linux 2.6.31-14-generic i686

[Gianfranco Costamagna (costamagnagianfranco)]

IMHO this bug should be fowarded to prelink upstream mantainers, shouldn't be fixed downstream

[Jérôme (jerome-bouat)]

Where is the upstream development repository ?

[Igor Borski (ibtemp)]

Now upstream is Git http://pkgs.fedoraproject.org/cgit/prelink.git

But judging from number of bugs in Fedora, Jakub does not spendsvery much time on prelink.

[Jérôme (jerome-bouat)]

In case they have time for prelink, I filed the below bug report to Fedora :

https://bugzilla.redhat.com/show_bug.cgi?id=928380

[Jérôme (jerome-bouat)]

In RedHat distro, a similar bug in the elfutils package will be fixed with 0.162 version. See comment #5 here :
https://bugzilla.redhat.com/show_bug.cgi?id=928380

[[e-mail] (r-fabbeni)]

https://bugs.launchpad.net/bugs/1849419
I believe this is quit related