On 7/5/2013 2:07 AM, John Andreasson wrote: > On Mon, Jul 1, 2013 at 12:05 AM, Stan Hoeppner <s...@hardwarefreak.com> wrote: >> Hmm... >> >> Last thing to try is rootflags. To your kernel line in menu.lst add >> >> root=/dev/sdXX rootflags=discard ro > > Thanks. I tried that as well but it still doesn't work. > > Just to be sure I created a file with random data, read the sectors > with hdparm and then removed the file and did a flush. If discard was > active the sector should be zeroed out. It was however still there > after a sync, and also after waiting an hour just in case. > >> If that doesn't do it maybe there's a bug here. > > It sounds like that. > > I took a look at the xfs source code in the kernel tree. It looks like > the discard code is simply never called except for when there's an > ioctl call. I guess that's what fstrim triggers. But from what I could > see there's no realtime support in kernel right now. I guess I should > go with ext4 for now.
Ask on the XFS mailing list. I'm pretty sure some of the XFS devs use XFS as rootfs w/Debian on SSD (Dave Chinner IIRC). According to Christoph discard should work with any kernel above 3.0--Wheezy is 3.2--as long as the other requirements are met. And your system seems to meet the others. -- Stan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/51d7106d.3020...@hardwarefreak.com
