[dm-devel] [PATCH 1/4] brd: handle misaligned discard

[Bart Van Assche]

On 10/26/2016 01:26 PM, Mikulas Patocka wrote:
> The brd driver refuses misaligned discard requests with an error. However,
> this is suboptimal, misaligned requests could be handled by discarding a
> part of the request that is aligned on a page boundary. This patch changes
> the code so that it handles misaligned requests.

Hello Mikulas,

We do not want this kind of discard request processing in every block 
driver. This is why I think that this kind of processing should be added 
to the block layer. See also "[PATCH v3 0/5] Make blkdev_issue_discard() 
submit aligned discard requests" 
(http://www.spinics.net/lists/linux-block/msg02360.html).

Bart.