From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [PATCH rdma-core 2/2] libhns: Support cq record doorbell Date: Sat, 20 Jan 2018 09:46:25 -0700 Message-ID: <20180120164625.GA14372@ziepe.ca> References: <1516242961-154453-1-git-send-email-liuyixian@huawei.com> <1516242961-154453-3-git-send-email-liuyixian@huawei.com> <20180118043717.GC8414@ziepe.ca> <9e577314-4fcb-45de-6909-d5b3be570196@huawei.com> <20180118161949.GA18973@ziepe.ca> <20180119200029.GD3437@ziepe.ca> <68e02f2a-0474-bc73-a784-fd52dbbde552@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <68e02f2a-0474-bc73-a784-fd52dbbde552-hv44wF8Li93QT0dZR+AlfA@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: "Liuyixian (Eason)" Cc: leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org On Sat, Jan 20, 2018 at 07:41:03PM +0800, Liuyixian (Eason) wrote: > new userspace will still run correctly if the kernel is old. As new userspace use > db_addr substitute operating register, it can run correctly only on new kernel > (the patchset goes with this patchset submitted to for-next) and later kernel versions. > I think it is reasonable for this case. Still not OK, we expect the user space to work with old kernels too. Jason -- 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