[linux-lvm] some questions

Christoph Anton Mitterer calestyo at scientia.net
Fri Jul 19 23:01:12 UTC 2013


On Fri, 2013-07-19 at 21:52 +0200, Zdenek Kabelac wrote:
> > E.g. in cryptsetup you have a general option which controls whether TRIM
> > is passed through dm-crypt to lower block layers... I though --discards
> > of being like that...
> By default every normal (i.e. linear) LV should pass-through discards - there 
> is AFAICS no code to block them and you can't disable them.
> For thin volume - it's going through the pool first - and you have the choice
> either to ignore them completely, process them at pool level or pass-through 
> the pool to pool data device.
Can you add that to the description of --discard in the manpage?

I think right now one might easily think that it's a general control, on
whether LVM passes these through or not.

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