From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Christie Subject: Re: [PATCH] rbd: lock_on_read map option Date: Sat, 24 Sep 2016 04:47:41 -0500 Message-ID: <57E64BBD.4040407@redhat.com> References: <1474554177-4029-1-git-send-email-idryomov@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: Received: from mx1.redhat.com ([209.132.183.28]:44706 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750889AbcIXJrn (ORCPT ); Sat, 24 Sep 2016 05:47:43 -0400 In-Reply-To: <1474554177-4029-1-git-send-email-idryomov@gmail.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Ilya Dryomov , ceph-devel@vger.kernel.org On 09/22/2016 09:22 AM, Ilya Dryomov wrote: > Add a per-device option to acquire exclusive lock on reads (in addition > to writes and discards). The use case is iSCSI, where it will be used > to prevent execution of stale writes after the implicit failover. > > Signed-off-by: Ilya Dryomov > --- > drivers/block/rbd.c | 13 ++++++++++++- > 1 file changed, 12 insertions(+), 1 deletion(-) > Tested-by: Mike Christie