Am Freitag, den 07.01.2011, 18:29 -0500 schrieb Greg Freemyer: > On Fri, Jan 7, 2011 at 5:52 PM, Jens Kasten <igraltist@xxxxxxxxx> wrote: > > Hi list, > > > > It is the first time the i write to this list. > > I am not sure if it the right place. > > > > I use the kernel 2.6.37 with cryptsetup and lvm on a intel ssd. > > In the logfile after booting i see this entry: > > EXT4-fs (dm-1): re-mounted. Opts: discard,errors=remount-ro > > EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: discard > > EXT4-fs (dm-3): mounted filesystem with ordered data mode. Opts: discard > > EXT4-fs (dm-2): mounted filesystem with ordered data mode. Opts: discard > > EXT4-fs warning (device dm-1): ext4_issue_discard:2619: discard not > > supported, disabling > > EXT4-fs warning (device dm-3): ext4_issue_discard:2619: discard not > > supported, disabling > > EXT4-fs warning (device dm-3): ext4_issue_discard:2619: discard not > > supported, disabling > > EXT4-fs warning (device dm-3): ext4_issue_discard:2619: discard not > > supported, disabling > > EXT4-fs (sda1): re-mounted. Opts: discard,commit=0 > > EXT4-fs (dm-3): re-mounted. Opts: discard,commit=0 > > EXT4-fs (dm-2): re-mounted. Opts: discard,commit=0 > > > > The mount command shows: > > /dev/mapper/System2-root_ssd on / type ext2 > > (rw,noatime,errors=remount-ro,barrier=1,stripe=32,data=ordered,discard) > > and the corresponding entry from fstab: > > UUID="635a1ad9-9ebb-4d1e-b8c3-30e11148bd92" / ext4 > > noatime,discard,errors=remount-ro 0 1 > > > > My question is now, I don't have trim support now? > > > > Viele GrÃsse > > Jens Kasten > > Jens, > > I don't believe DM supports discard / trim passthru. For > clarification, you should ask on the Device Mapper list. > <dm-devel@xxxxxxxxxx> > > Alternatively, you may find that the wiper.sh script packaged with > hdparm may work. wiper.sh bypasses the DM layer and talks directly to > the drives, but it too has limitations. The wiper.sh script is meant > to be called on a routine basis via cron, etc. > > Greg > -- > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html Hi Greg, ok i will ask on this list. Jens -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
