On Wed, May 25 2011 at 4:11am -0400, Franck Routier (personnel) <alci@mecadu.org> wrote: > Le mardi 24 mai 2011 à 09:14 -0400, Mike Snitzer a écrit : > > > When using -o discard, ext4 will log a warning if a discard failed (and > > will disable discards). > > > > So ext4 is a great indicator for whether discards are working on your > > striped LV volume. > > > > Just out of curiosity, how does ext4 tell if discards is working or > not ? It checks the return code from ext4_issue_discard() -- which comes from sb_issue_discard(). See: fs/ext4/mballoc.c:release_blocks_on_commit() _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
