Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934750AbcCOMVt (ORCPT ); Tue, 15 Mar 2016 08:21:49 -0400 Received: from [198.137.202.9] ([198.137.202.9]:57940 "EHLO bombadil.infradead.org" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S932688AbcCOMVk (ORCPT ); Tue, 15 Mar 2016 08:21:40 -0400 Date: Tue, 15 Mar 2016 05:18:32 -0700 From: Christoph Hellwig To: Or Gerlitz Cc: Alexey Kardashevskiy , Huy Nguyen , Doug Ledford , Eugenia Emantayev , Hal Rosenstock , Sean Hefty , Yishai Hadas , Linux Kernel , "linux-rdma@vger.kernel.org" , Linux Netdev List , Paul Mackerras , Carol L Soto , Yevgeny Petrilin Subject: Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to 4KB regardless of system page size" Message-ID: <20160315121832.GA4741@infradead.org> References: <1458037148-4475-1-git-send-email-aik@ozlabs.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 247 Lines: 5 On Tue, Mar 15, 2016 at 12:40:06PM +0200, Or Gerlitz wrote: > "[..] Regarding backward compatibility in SR-IOV, if hypervisor has > this new code, the virtual OS must be updated. [...]" Which is broken, we can't break user or guest VM ABIs ever.