Default boot/root filesystem

Chris Murphy lists at
Wed Sep 25 14:48:05 UTC 2013

On Sep 25, 2013, at 6:12 AM, Ric Wheeler <rwheeler at> wrote:
> We should not confuse TRIM that gets handled at the device layer (and is a slow, non-queued S-ATA command for example) and a dm-thin parsing of that same command in software which just updates the metadata that dm-thin maintains.

Yes, fair point. I should have qualified the assertion better to indicate default discard to the physical device is probably not a good idea. Or maybe it needs to get smarter, and initiated when the fs isn't particularly busy. A kind of delayed discard.

Chris Murphy

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