[linux-lvm] Trim support on stripped volumes ?

[Franck Routier (personnel)]

Le mardi 24 mai 2011 à 09:14 -0400, Mike Snitzer a écrit :

> When using -o discard, ext4 will log a warning if a discard failed (and
> will disable discards).
> 
> So ext4 is a great indicator for whether discards are working on your
> striped LV volume.
> 

Just out of curiosity, how does ext4 tell if discards is working or
not ?