Please forgive me once again, I've found the problem. My initial request was about discard on dm-crypt (encrypted LUKS device).
>From the link you sent it seems to be not supported: "The only DM targets that do not support discards are dm-snapshot, dm-crypt, and dm-raid45. Discard support for the dm-mirror was added in Red Hat Enterprise Linux 6.1. " Very sad, any chance of adding this support? 2013/8/27 LightDot <[email protected]> > What's Arch got to do with OpenVZ RHEL based kernel? > > Red Hat backports different functionality into RHEL kernel and the thing > you're using is far far from plain vanilla 2.6.32 or any other distro's > 2.6.32. > > Anyway, RHEL 6 does have trim support, simply refer to the relevant docs: > > https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/newmds-ssdtuning.html > > There's also a myriad of how-to's on the net about RHEL and SSDs... There > are also Proxmox threads about SSDs and Debian converted OpenVZ RHEL > kernels, if that's what you're using. > > Regards > > > > > On Tue, Aug 27, 2013 at 5:20 PM, spameden <[email protected]> wrote: > >> ArchLinux wiki says: >> *Warning: *Users need to be certain that kernel version 2.6.33 or above >> is being used AND that their SSD supports TRIM before attempting to mount a >> partition with the discard flag. Data loss can occur otherwise! >> >> So I guess it's not in the OpenVZ kernel? >> >> I'd like to use TRIM because it increases performance to SSD drastically! >> >> >> 2013/8/27 spameden <[email protected]> >> >>> is it implemented? >>> >>> I've tried on 3.2.0-4 debian wheezy default kernel it's working just >>> fine: >>> # dmsetup table >>> vg0-home: 0 443277312 linear 9:1 25166208 >>> home: 0 443273216 crypt aes-cbc-plain >>> 0000000000000000000000000000000000000000000000000000000000000000 0 253:2 >>> 4096 1 allow_discards >>> >>> But not on OpenVZ's 2.6.32.xxxx: >>> # dmsetup table >>> vg0-home: 0 443277312 linear 9:1 25166208 >>> home: 0 443273216 crypt aes-cbc-plain >>> 0000000000000000000000000000000000000000000000000000000000000000 0 253:2 >>> 4096 >>> vg0-swap: 0 4194304 linear 9:1 20971904 >>> vg0-root: 0 20971520 linear 9:1 384 >>> >>> >>> >>> >> >> _______________________________________________ >> Users mailing list >> [email protected] >> https://lists.openvz.org/mailman/listinfo/users >> >> > > _______________________________________________ > Users mailing list > [email protected] > https://lists.openvz.org/mailman/listinfo/users > >
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