From mboxrd@z Thu Jan 1 00:00:00 1970 From: 'Christoph Hellwig' Subject: Re: [PATCH V3 1/5] RDMA/core: Transport-independent access flags Date: Tue, 14 Jul 2015 08:36:19 -0700 Message-ID: <20150714153619.GC11026@infradead.org> References: <559CD174.4040901@dev.mellanox.co.il> <20150708190842.GB11740@obsidianresearch.com> <559D983D.6000804@talpey.com> <20150708233604.GA20765@obsidianresearch.com> <559E54AB.2010905@dev.mellanox.co.il> <20150709170142.GA21921@obsidianresearch.com> <20150711102538.GB14741@infradead.org> <55A4134C.2040301@talpey.com> <20150713201538.GA11681@obsidianresearch.com> <55A4D20C.2000904@dev.mellanox.co.il> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <55A4D20C.2000904-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org> Sender: linux-nfs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Sagi Grimberg Cc: Jason Gunthorpe , Tom Talpey , 'Christoph Hellwig' , Steve Wise , dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, sagig-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, roid-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, eli-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, trond.myklebust-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org, bfields-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org, Oren Duer List-Id: linux-rdma@vger.kernel.org On Tue, Jul 14, 2015 at 12:10:36PM +0300, Sagi Grimberg wrote: > Having an API that does FRMR/FMR/PHYS_MR is even worse from the ULP > PoV. If you expose an API that might schedule (PHYS_MR) it limits the > context that the caller is allowed to call in. > > I'm 100% against an registration API that *might* schedule. Oh, I had missed that PHYS_MR might sleep. That might be the reasons why everyone is avoiding them despite Tom preferring them over FMR. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html