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-   -   dm_thin: add pool target flags to control discard (http://www.linux-archive.org/device-mapper-development/648004-dm_thin-add-pool-target-flags-control-discard.html)

Alasdair G Kergon 03-23-2012 11:37 AM

dm_thin: add pool target flags to control discard
 
On Fri, Mar 16, 2012 at 03:22:34PM +0000, Joe Thornber wrote:
> + 'ignore_discard': disable discard support
> + 'no_discard_passdown': don't pass discards down to the underlying data device

If someone reloads the pool target changing either of these options, how do connected
thin targets pick up the change? If they don't pick it up automatically, how do you
determine whether they did or didn't pick it up - is that internal state not
exposed to userspace yet?

Alasdair

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