From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932385AbcK2A4e (ORCPT ); Mon, 28 Nov 2016 19:56:34 -0500 Received: from mail-pg0-f41.google.com ([74.125.83.41]:36020 "EHLO mail-pg0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755757AbcK2A4Z (ORCPT ); Mon, 28 Nov 2016 19:56:25 -0500 Date: Mon, 28 Nov 2016 16:56:18 -0800 (PST) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Mikulas Patocka cc: Douglas Anderson , Mike Snitzer , shli@kernel.org, Dmitry Torokhov , linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, dm-devel@redhat.com, linux@roeck-us.net, Sonny Rao , Alasdair Kergon Subject: Re: [PATCH] RFC: dm: avoid the mutex lock in dm_bufio_shrink_count() In-Reply-To: Message-ID: References: <1479417398-2593-1-git-send-email-dianders@chromium.org> User-Agent: Alpine 2.10 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 23 Nov 2016, Mikulas Patocka wrote: > From: Mikulas Patocka > > dm-bufio: don't take the lock in dm_bufio_shrink_count > > dm_bufio_shrink_count is called from do_shrink_slab to find out how many > freeable objects are there. The reported value doesn't have to be precise, > so we don't need to take the dm-bufio lock. > > Signed-off-by: Mikulas Patocka Acked-by: David Rientjes