On Wed, 23 Sep 2020 16:09:30 -0400 Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote: > On Tue, Sep 22, 2020 at 09:01:25AM +0200, SeongJae Park wrote: > > From: SeongJae Park <sjpark@xxxxxxxxx> > > > > Persistent grants feature provides high scalability. On some small > > systems, however, it could incur data copy overhead[1] and thus it is > > required to be disabled. But, there is no option to disable it. For > > the reason, this commit adds a module parameter for disabling of the > > feature. > > Would it be better suited to have it per guest? The latest version of this patchset[1] supports blkfront side disablement. Could that partially solves your concern? [1] https://lore.kernel.org/xen-devel/20200923061841.20531-1-sjpark@xxxxxxxxxx/ Thanks, SeongJae Park
