<div dir="ltr"><div><div><div>What's Arch got to do with OpenVZ RHEL based kernel?<br><br>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.<br>
<br></div>Anyway, RHEL 6 does have trim support, simply refer to the relevant docs:<br><a href="https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/newmds-ssdtuning.html">https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/newmds-ssdtuning.html</a><br>
<br></div>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.<br><br></div>
Regards<br>
<div><br><div><br></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Aug 27, 2013 at 5:20 PM, spameden <span dir="ltr"><<a href="mailto:spameden@gmail.com" target="_blank">spameden@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>ArchLinux wiki says:<br><strong>Warning: </strong>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 <code style="display:inline-block;padding:0.1em 0.3em">discard</code> flag. Data loss can occur otherwise!<br><br></div>So I guess it's not in the OpenVZ kernel?<br><br>I'd like to use TRIM because it increases performance to SSD drastically!<br>
</div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">2013/8/27 spameden <span dir="ltr"><<a href="mailto:spameden@gmail.com" target="_blank">spameden@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div><div>is it implemented?<br><br></div>I've tried on 3.2.0-4 debian wheezy default kernel it's working just fine:<br># dmsetup table<br>vg0-home: 0 443277312 linear 9:1 25166208<br>home: 0 443273216 crypt aes-cbc-plain 0000000000000000000000000000000000000000000000000000000000000000 0 253:2 4096 1 allow_discards<br>
<br>But not on OpenVZ's 2.6.32.xxxx:<br># dmsetup table<br>vg0-home: 0 443277312 linear 9:1 25166208<br>home: 0 443273216 crypt aes-cbc-plain 0000000000000000000000000000000000000000000000000000000000000000 0 253:2 4096<br>
vg0-swap: 0 4194304 linear 9:1 20971904<br>vg0-root: 0 20971520 linear 9:1 384<br><br><br></div><br></div>
</blockquote></div><br></div>
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