Re: Summary: Moving /tmp to tmpfs makes it useless

[Tollef Fog Heen <tfheen@err.no>]

]] Philipp Kern 

> On Sun, Jun 10, 2012 at 07:46:57PM +0200, Stephan Seitz wrote:
> > On Sun, Jun 10, 2012 at 07:12:11PM +0200, Tollef Fog Heen wrote:
> > >]] Stephan Seitz
> > >>Will Wheezy support SSDs out of the box with all trimming functions,
> > >>even if your SSD partition is using LUKS and LVM?
> > >Depends on what you mean by out of the box.  I suspect you still need to
> > >turn on discard support (since it has security implications).  It does
> > >not require extra packages or patches.
> > Well, nice to hear, but I thought, discard was needed in all layers,
> > so in my example in LUKS, then in LVM and then in the filesystem. Or
> > is his only a function you activate via hdparm?
> 
> It's available in all layers, but as Tollef said it's manual. (In crypttab most
> likely, because that's commonly the lowest layer.)

You need to enable it in all layers (fstab, crypttab, lvm.conf), yes.

-- 
Tollef Fog Heen
UNIX is user friendly, it's just picky about who its friends are