On Wed, May 09 2012 at 2:03am -0400,
Busby <chaimvy@xxxxxxxxx> wrote:
> I created pool without ignore_discard feature, is this the way to
> enable discard? I mounted the ext4 with '--discard' args, I will trace
> whether the ext4 really issue discard later.
thin-pool's discard support (and discard passdown) are enabled by
default. But again, if the underlying storage doesn't support discards
you'll get this warning when you load the thin-pool's table:
device-mapper: thin: Discard unsupported by data device: Disabling discard passdown.
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