I followed your example and trims seems to work (based on the lvs output) but as you can see, there seems to be something wrong with the "fstrim -v" output (it shows as if nothing is being trimmed). # lvs vgthin1 lvol1 vgthin1 Vwi-aotz- 100.78g lvthinpool 3.20 lvthinpool vgthin1 twi-a-tz- 100.68g 3.20 # mount /var/lib/libvirt/images # fstrim -v /var/lib/libvirt/images /var/lib/libvirt/images: 97.6 GiB (104814780416 bytes) trimmed # dd if=/dev/zero of=/var/lib/libvirt/images/file bs=1M count=1024 # dd if=/dev/zero of=/var/lib/libvirt/images/file1 bs=1M count=1024 # dd if=/dev/zero of=/var/lib/libvirt/images/file2 bs=1M count=1024 # sync # lvs vgthin1 lvol1 vgthin1 Vwi-aotz- 100.78g lvthinpool 6.18 lvthinpool vgthin1 twi-a-tz- 100.68g 6.18 # rm -f /var/lib/libvirt/images/file # sync # fstrim -v /var/lib/libvirt/images /var/lib/libvirt/images: 0 B (0 bytes) trimmed # lvs vgthin1 lvol1 vgthin1 Vwi-aotz- 100.78g lvthinpool 5.19 lvthinpool vgthin1 twi-a-tz- 100.68g 5.19 # rm -f /var/lib/libvirt/images/file* # sync # fstrim -v /var/lib/libvirt/images /var/lib/libvirt/images: 0 B (0 bytes) trimmed # lvs vgthin1 lvol1 vgthin1 Vwi-aotz- 100.78g lvthinpool 3.20 lvthinpool vgthin1 twi-a-tz- 100.68g 3.20 # lvm version LVM version: 2.02.98(2) (2012-10-15) Library version: 1.02.77 (2012-10-15) Driver version: 4.24.0 # dd if=/dev/zero of=/var/lib/libvirt/images/tempfile bs=1M count=40000 # lvs vgthin1 lvol1 vgthin1 Vwi-aotz- 100.78g lvthinpool 41.84 lvthinpool vgthin1 twi-a-tz- 100.68g 41.89 # rm -f /var/lib/libvirt/images/tempfile # sync # fstrim -v /var/lib/libvirt/images /var/lib/libvirt/images: 0 B (0 bytes) trimmed # lvs vgthin1 lvol1 vgthin1 Vwi-aotz- 100.78g lvthinpool 3.08 lvthinpool vgthin1 twi-a-tz- 100.68g 3.09 As you may see, this is the behaviour I'm getting now (fstrim reports nothing being trimmed although it is being trimmed). I can't recreate the original problem when I opened the bug (fstrim reporting always 124 MiB). I'm not sure if any update had to do anything with it. _______________________________________________ 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/
