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spf=none smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jDliM-00054Z-1a; Mon, 16 Mar 2020 09:07:14 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jDliK-00054U-Om for xen-devel@lists.xenproject.org; Mon, 16 Mar 2020 09:07:12 +0000 X-Inumbo-ID: 8578308c-6765-11ea-a6c1-bc764e2007e4 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 8578308c-6765-11ea-a6c1-bc764e2007e4; Mon, 16 Mar 2020 09:07:12 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 855B3AE84; Mon, 16 Mar 2020 09:07:10 +0000 (UTC) To: Andrew Cooper References: <60130f14-3fc5-e40d-fec6-2448fefa6fc4@suse.com> <8221cc7f-ad33-03da-5780-8a76fbdc404a@suse.com> From: Jan Beulich Message-ID: <587987a7-5e28-36d7-ac15-b309b1964229@suse.com> Date: Mon, 16 Mar 2020 10:07:09 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Subject: Re: [Xen-devel] [PATCH 3/4] x86/APIC: reduce rounding errors in calculations X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: "xen-devel@lists.xenproject.org" , Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" T24gMTMuMDMuMjAyMCAxNjo1MCwgQW5kcmV3IENvb3BlciB3cm90ZToKPiBPbiAxMy8wMy8yMDIw IDA5OjI2LCBKYW4gQmV1bGljaCB3cm90ZToKPj4gLS0tIGEveGVuL2FyY2gveDg2L2FwaWMuYwo+ PiArKysgYi94ZW4vYXJjaC94ODYvYXBpYy5jCj4+IEBAIC0xMjQ5LDE3ICsxMjQ5LDE2IEBAIHN0 YXRpYyBpbnQgX19pbml0IGNhbGlicmF0ZV9BUElDX2Nsb2NrKHYKPj4gICAgICB0dDIgPSBhcGlj X3JlYWQoQVBJQ19UTUNDVCk7Cj4+ICAgICAgdDIgPSByZHRzY19vcmRlcmVkKCk7Cj4+ICAKPj4g LSAgICByZXN1bHQgPSAodHQxLXR0MikqQVBJQ19ESVZJU09SL0xPT1BTOwo+PiArICAgIGJ1c19m cmVxID0gKHR0MSAtIHR0MikgKiBBUElDX0RJVklTT1IgKiBMT09QU19GUkFDOwo+PiAgCj4+IC0g ICAgYXBpY19wcmludGsoQVBJQ19WRVJCT1NFLCAiLi4uLi4gQ1BVIGNsb2NrIHNwZWVkIGlzICVs ZC4lMDRsZCBNSHouXG4iLAo+PiAtICAgICAgICAgICAgICAgICgobG9uZykodDIgLSB0MSkgLyBM T09QUykgLyAoMTAwMDAwMCAvIEhaKSwKPj4gLSAgICAgICAgICAgICAgICAoKGxvbmcpKHQyIC0g dDEpIC8gTE9PUFMpICUgKDEwMDAwMDAgLyBIWikpOwo+PiArICAgIGFwaWNfcHJpbnRrKEFQSUNf VkVSQk9TRSwgIi4uLi4uIENQVSBjbG9jayBzcGVlZCBpcyAlbHUuJTA0bHUgTUh6LlxuIiwKPj4g KyAgICAgICAgICAgICAgICAoKHVuc2lnbmVkIGxvbmcpKHQyIC0gdDEpICogTE9PUFNfRlJBQykg LyAxMDAwMDAwLAo+PiArICAgICAgICAgICAgICAgICgodW5zaWduZWQgbG9uZykodDIgLSB0MSkg KiBMT09QU19GUkFDIC8gMTAwKSAlIDEwMDAwKTsKPiAKPiBJZiBJJ20gbm90IG1pc3Rha2VuLCB0 aGlzIGV4cHJlc3Npb24gb25seSB3b3JrcyBiZWNhdXNlIG9mIHRoZSBMLT5SCj4gYXNzb2NpYXRp dml0eSAoZ2l2ZW4gdGhlIHNhbWUgcHJlY2VkZW5jZSBvZiAqIGFuZCAvKSBncm91cGluZyBpdCBh cwo+ICgodDItdDEpICogMTApwqAgLyAxMDAgYXMgb3Bwb3NlZCB0byAodDItdDEpICogKDEwIC8g MTAwKSwgd2hlcmUgdGhlCj4gbGF0dGVyIHdvdWxkIHRydW5jYXRlIHRvIDAuwqAgSSB0aGluayBz b21lIGV4dHJhIGJyYWNrZXRzIHdvdWxkIGhlbHAgZm9yCj4gY2xhcml0eS4KCldlbGwsIHllcywg ZG9uZS4gVGhlIGFsdGVybmF0aXZlIHdvdWxkIGhhdmUgYmVlbiB0byBkcm9wIG1vcmUgb2YKdGhl bS4KCj4gVGhhdCBzYWlkLCB3aGF0IGlzIHdyb25nIHdpdGgga2VlcGluZyB0aGUgb3JpZ2luYWwg Zm9ybT8KClRoZSBzYW1lIGFzIGVsc2V3aGVyZSBpbiB0aGlzIHBhdGNoLCBhbmQgYXMgc2FpZCBp biB0aGUgZGVzY3JpcHRpb24gLQp0aGVyZSdzIGJlZW4gcG9pbnRsZXNzIHJvdW5kaW5nIChyZWFs bHk6IHRydW5jYXRpb24pIGVycm9ycyBoZXJlIGZyb20KZmlyc3QgZGl2aWRpbmcgYnkgSFogKHRv IGJlIHByZWNpc2U6IGJ5IEhaLzEwKSBhbmQgdGhlbiBlZmZlY3RpdmVseQptdWx0aXBseWluZyBi eSB0aGlzIHZhbHVlIGFnYWluLiBUaGUgb3JpZ2luYWwgZGl2aXNpb24tb25seSBhcmd1bWVudAp3 b3VsZCBub3QgYmUgYWZmZWN0ZWQgYWZhaWN0LCBidXQgdGhlIHJlbWFpbmRlciBvbmUgd291bGQu IEZ1cnRoZXJtb3JlCkknZCBsaWtlIHRvIGF2b2lkIGhhdmluZyB0byByZXRhaW4gdGhlIExPT1BT IGNvbnN0YW50LgoKPsKgIEkgcmVhbGlzZSB0aGlzCj4gaXMgb25seSBmb3IgYSBwcmludGsoKSwg YnV0IHRoZSBkaXYgaW5zdHJ1Y3Rpb24gY2FuJ3QgYmUgc2hhcmVkIGJldHdlZW4KPiB0aGUgdHdv IGhhbHZlcy4KClRoaXMgYmVpbmcgYW4gX19pbml0IGZ1bmN0aW9uLCBJIGRvbid0IHRoaW5rIHRo ZSBudW1iZXIgb2YgZGl2aXNpb25zCmlzIGEgY29uY2VybiBoZXJlLCB0aGUgbW9yZSB0aGF0IHRo ZSBjb21waWxlciAtIHdpdGggdGhlIGRpdmlzb3IKYmVpbmcgYSBjb25zdGFudCAtIHdpbGwgY29u dmVydCB0aGVtIHRvIG11bHRpcGxpY2F0aW9ucyBhbnl3YXkuCgpKYW4KCl9fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QK WGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5v cmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=