From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [PATCH 0/5] Indirect memory registration feature Date: Mon, 8 Jun 2015 06:22:54 -0700 Message-ID: <20150608132254.GA14773@infradead.org> References: <1433769339-949-1-git-send-email-sagig@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1433769339-949-1-git-send-email-sagig-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Sagi Grimberg Cc: Doug Ledford , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Or Gerlitz , Eli Cohen , Oren Duer , Sagi Grimberg List-Id: linux-rdma@vger.kernel.org On Mon, Jun 08, 2015 at 04:15:34PM +0300, Sagi Grimberg wrote: > There are couple of possible (sub-optimal) solutions to handle this limitation: There is another one: Set the block level SG_GAPS flags to ensure the block layer never generates these SG lists. Right now drivers tat set these would always fail SG_IO ioctls using iovecs, but that can be fixed much more easily by doing high level bounce buffering compared to these horrible workarounds deep down in the stack. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html