From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH v2 09/20] xen/biomerge: Don't allow biovec to be merge when Linux is not using 4KB page Date: Fri, 17 Jul 2015 15:44:37 +0100 Message-ID: <55A914D5.7080900__1113.16148327223$1437144450$gmane$org@citrix.com> References: <1436474552-31789-1-git-send-email-julien.grall@citrix.com> <1436474552-31789-10-git-send-email-julien.grall@citrix.com> <20150710191245.GA31063@l.oracle.com> <55A7D8AD.1090102@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1ZG6tl-00030r-9A for xen-devel@lists.xenproject.org; Fri, 17 Jul 2015 14:46:02 +0000 In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Stefano Stabellini Cc: ian.campbell@citrix.com, linux-kernel@vger.kernel.org, David Vrabel , xen-devel@lists.xenproject.org, Boris Ostrovsky , linux-arm-kernel@lists.infradead.org List-Id: xen-devel@lists.xenproject.org On 17/07/15 14:20, Stefano Stabellini wrote: > We would have to run some benchmarks, but I think it would still be a > win. We should write an ad-hoc __pfn_to_mfn translation function that > operates on a range of pfns and simply checks whether an entry is > present in that range. It should be just as fast as __pfn_to_mfn. I > would definitely recommend it. I'd like to see a basic support of 64KB support on Xen pushed in Linux upstream before looking to possible improvement in the code. Can we defer this as the follow-up of this series? Regards, -- Julien Grall