From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thanos Makatos Subject: dm-cache suspend semantics Date: Wed, 19 Aug 2015 12:26:20 +0100 Message-ID: Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: device-mapper development Cc: heinzm@redhat.com, thornber@redhat.com, Mike Snitzer List-Id: dm-devel.ids I'd like to know whether it is possible for a cache target for which there are dirty blocks to continue writing back dirty data after it has been suspended. Can this happen? I checked the code and cache_postsuspend() suggests that after the target is suspended no write back I/O will be initiated (I also did a quick test that confirms this), however I'd appreciate an answer from the maintainers as I might have misunderstood. -- Thanos Makatos