From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Yu, Zhang" Subject: Re: [PATCH v2 1/2] Resize the MAX_NR_IO_RANGES for ioreq server Date: Tue, 07 Jul 2015 22:49:26 +0800 Message-ID: <559BE6F6.4020403@linux.intel.com> References: <1436163912-1506-1-git-send-email-yu.c.zhang@linux.intel.com> <1436163912-1506-2-git-send-email-yu.c.zhang@linux.intel.com> <9AAE0902D5BC7E449B7C8E4E778ABCD02598AEEF@AMSPEX01CL02.citrite.net> <9AAE0902D5BC7E449B7C8E4E778ABCD02598B096@AMSPEX01CL02.citrite.net> <559A826E.1000905@eu.citrix.com> <9AAE0902D5BC7E449B7C8E4E778ABCD02598B222@AMSPEX01CL02.citrite.net> <559B8AD2.4090806@linux.intel.com> <9AAE0902D5BC7E449B7C8E4E778ABCD02598C7B8@AMSPEX01CL02.citrite.net> <559BE7D2020000780008D715@mail.emea.novell.com> <9AAE0902D5BC7E449B7C8E4E778ABCD02598D2B4@AMSPEX01CL02.citrite.net> < 559BF881020000780008D83D@mail.emea.novell.com> <559BE283.8000107@linux.intel.com> <559C01C2020000780008D8EC@mail.emea.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <559C01C2020000780008D8EC@mail.emea.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Jan Beulich Cc: Kevin Tian , "Keir (Xen.org)" , Andrew Cooper , George Dunlap , "xen-devel@lists.xen.org" , Paul Durrant , "zhiyuan.lv@intel.com" List-Id: xen-devel@lists.xenproject.org On 7/7/2015 10:43 PM, Jan Beulich wrote: >>>> On 07.07.15 at 16:30, wrote: >> I know that George and you have concerns about the differences >> between MMIO and guest page tables, but I do not quite understand >> why. :) > > But you read George's very nice description of the differences? I > ask because if you did, I don't see why you re-raise the question > above. > Well, yes. I guess you mean this statement: "the former is one or two actual ranges of a significant size; the latter are (apparently) thousands of ranges of one page each."? But I do not understand why this is abusing the io range interface. Does the number matters so much? :) B.R. Yu > Jan > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel > >