[dm-devel] [PATCH 0/4] brd: support discard

[Mikulas Patocka]

On Tue, 25 Oct 2016, Jens Axboe wrote:

> On 10/25/2016 08:37 AM, Mike Snitzer wrote:
> > On Tue, Oct 25 2016 at  9:07P -0400,
> > Christoph Hellwig <hch at infradead.org> wrote:
> > 
> > > I think the right fix is to kill off the BLKFLSBUF special case in
> > > brd.  Yes, it break compatibility - but in this case the compatibility
> > > breaks more than it helps.
> > 
> > Jens, please pick up this patch:
> > 
> > From: Mike Snitzer <snitzer at redhat.com>
> > Date: Tue, 25 Oct 2016 10:25:07 -0400
> > Subject: [PATCH] brd: remove support for BLKFLSBUF
> 
> Added, thanks.
> 
> -- 
> Jens Axboe

Hi

With the removal of BLKFLSBUF, there is no way to free memory allocated by 
ramdisk, so I created these 4 patches that add DISCARD support for 
ramdisk.

Mikulas