From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: Re: [PATCH v4 0/9] mpt3sas and dmapool scalability Date: Mon, 12 Nov 2018 22:44:44 -0800 Message-ID: <20181113064444.GU21824@bombadil.infradead.org> References: <88395080-efc1-4e7b-f813-bb90c86d0745@cybernetics.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <88395080-efc1-4e7b-f813-bb90c86d0745-vFAe+i1/wJI5UWNf+nJyDw@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Tony Battersby Cc: linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org" , Christoph Hellwig , "linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: iommu@lists.linux-foundation.org On Mon, Nov 12, 2018 at 10:40:57AM -0500, Tony Battersby wrote: > I posted v3 on August 7. Nobody acked or merged the patches, and then > I got too busy with other stuff to repost until now. Thanks for resending. They were in my pile of things to look at, but that's an ever-growing pile. > I believe these patches are ready for merging. I agree. > cat /sys/devices/pci0000:80/0000:80:07.0/0000:85:00.0/pools > (manually cleaned up column alignment) > poolinfo - 0.1 > reply_post_free_array pool 1 21 192 1 > reply_free pool 1 1 41728 1 > reply pool 1 1 1335296 1 > sense pool 1 1 970272 1 > chain pool 373959 386048 128 12064 > reply_post_free pool 12 12 166528 12 That reply pool ... 1 object of 1.3MB? That's a lot of strain to put on the page allocator. I wonder if anything can be done about that. (I'm equally non-thrilled about the sense pool, the reply_post_free pool and the reply_free pool, but they seem a little less stressful than the reply pool)