From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: [Lsf] [RFC] writeback and cgroup Date: Wed, 4 Apr 2012 11:56:05 -0700 Message-ID: <20120404185605.GC29686__15720.5328964212$1333565782$gmane$org@dhcp-172-17-108-109.mtv.corp.google.com> References: <20120403183655.GA23106@dhcp-172-17-108-109.mtv.corp.google.com> <20120404145134.GC12676@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Steve French Cc: ctalbott-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, rni-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, andrea-oIIqvOZpAevzfdHfmsDf5w@public.gmane.org, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, lsf-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, jmoyer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Vivek Goyal List-Id: containers.vger.kernel.org On Wed, Apr 04, 2012 at 10:36:04AM -0500, Steve French wrote: > > How do you take care of thorottling IO to NFS case in this model? Current > > throttling logic is tied to block device and in case of NFS, there is no > > block device. > > Similarly smb2 gets congestion info (number of "credits") returned from > the server on every response - but not sure why congestion > control is tied to the block device when this would create > problems for network file systems I hope the previous replies answered this. It's about writeback getting pressure from bdi and isn't restricted to block devices. Thanks. -- tejun