Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E30F5C636D4 for ; Mon, 13 Feb 2023 08:18:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229759AbjBMISZ (ORCPT ); Mon, 13 Feb 2023 03:18:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229680AbjBMISX (ORCPT ); Mon, 13 Feb 2023 03:18:23 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90549CA1F for ; Mon, 13 Feb 2023 00:18:22 -0800 (PST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 3BBF8376EC; Mon, 13 Feb 2023 08:18:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1676276301; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=n2OOk70gj51JdKCOUTv6xRulLiFPZbvw42JsAJ/KCk0=; b=BykbiMwgjH5Ns+dwUqZYygB/MzoGLyukxXdW5/xbivg9SlmphFebNboZbPAEekeRuqBCac SwuKrtayKeio8dQMXtCJqZCjDQB8sDEO0yKg2fjQLw0/fW2rR+bSyHi3v2nwx4nDEOGhnO 9dK+rH2WzEJbCQmt4cikSydnCx53xNk= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id C2C02138E6; Mon, 13 Feb 2023 08:18:20 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 6V6pLUzy6WOZNQAAMHmgww (envelope-from ); Mon, 13 Feb 2023 08:18:20 +0000 Message-ID: <51f4525e-7233-569f-f62d-07551c382deb@suse.com> Date: Mon, 13 Feb 2023 09:18:20 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Subject: Re: [PATCH linux-next v3] x86/xen/time: prefer tsc as clocksource when it is invariant Content-Language: en-US To: Krister Johansen , Boris Ostrovsky , Jan Beulich Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, Marcelo Tosatti , Anthony Liguori , David Reaver , Brendan Gregg References: <20221216162118.GB2633@templeofstupid.com> From: Juergen Gross In-Reply-To: <20221216162118.GB2633@templeofstupid.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------k9hLZD2BZbf0hFZ4lOz9NAKd" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------k9hLZD2BZbf0hFZ4lOz9NAKd Content-Type: multipart/mixed; boundary="------------EWvDk0ef4AchGgsNDia3wk4B"; protected-headers="v1" From: Juergen Gross To: Krister Johansen , Boris Ostrovsky , Jan Beulich Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, Marcelo Tosatti , Anthony Liguori , David Reaver , Brendan Gregg Message-ID: <51f4525e-7233-569f-f62d-07551c382deb@suse.com> Subject: Re: [PATCH linux-next v3] x86/xen/time: prefer tsc as clocksource when it is invariant References: <20221216162118.GB2633@templeofstupid.com> In-Reply-To: <20221216162118.GB2633@templeofstupid.com> --------------EWvDk0ef4AchGgsNDia3wk4B Content-Type: multipart/mixed; boundary="------------ySj6xqIXWWVvBswX3GYsWw0f" --------------ySj6xqIXWWVvBswX3GYsWw0f Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 T24gMTYuMTIuMjIgMTc6MjEsIEtyaXN0ZXIgSm9oYW5zZW4gd3JvdGU6DQo+IEt2bSBlbGVj dHMgdG8gdXNlIHRzYyBpbnN0ZWFkIG9mIGt2bS1jbG9jayB3aGVuIGl0IGNhbiBkZXRlY3Qg dGhhdCB0aGUNCj4gVFNDIGlzIGludmFyaWFudC4NCj4gDQo+IChBcyBvZiBjb21taXQgNzUz OWIxNzRhZWY0ICgieDg2OiBrdm1ndWVzdDogdXNlIFRTQyBjbG9ja3NvdXJjZSBpZg0KPiBp bnZhcmlhbnQgVFNDIGlzIGV4cG9zZWQiKSkuDQo+IA0KPiBOb3RhYmxlIGNsb3VkIHZlbmRv cnNbMV0gYW5kIHBlcmZvcm1hbmNlIGVuZ2luZWVyc1syXSByZWNvbW1lbmQgdGhhdCBYZW4N Cj4gdXNlcnMgcHJlZmVyZW50aWFsbHkgc2VsZWN0IHRzYyBvdmVyIHhlbi1jbG9ja3NvdXJj ZSBkdWUgdGhlIHBlcmZvcm1hbmNlDQo+IHBlbmFsdHkgaW5jdXJyZWQgYnkgdGhlIGxhdHRl ci4gIFRoZXNlIGFydGljbGVzIGFyZSBwZXJzdWFzaXZlIGFuZA0KPiB0YWlsb3JlZCB0byBz cGVjaWZpYyB1c2UgY2FzZXMuICBJbiBvcmRlciB0byB1bmRlcnN0YW5kIHRoZSB0cmFkZW9m ZnMNCj4gYXJvdW5kIHRoaXMgY2hvaWNlIG1vcmUgZnVsbHksIHRoaXMgYXV0aG9yIGhhZCB0 byByZWZlcmVuY2UgdGhlDQo+IGRvY3VtZW50ZWRbM10gY29tcGxleGl0aWVzIGFyb3VuZCB0 aGUgWGVuIGNvbmZpZ3VyYXRpb24sIGFzIHdlbGwgYXMgdGhlDQo+IGtlcm5lbCdzIGNsb2Nr c291cmNlIHNlbGVjdGlvbiBhbGdvcml0aG0uICBNYW55IHVzZXJzIG1heSBub3QgYXR0ZW1w dA0KPiB0aGlzIHRvIGNvcnJlY3RseSBjb25maWd1cmUgdGhlIHJpZ2h0IGNsb2NrIHNvdXJj ZSBpbiB0aGVpciBndWVzdC4NCj4gDQo+IFRoZSBhcHByb2FjaCB0YWtlbiBpbiB0aGUga3Zt LWNsb2NrIG1vZHVsZSBzcGFyZXMgdXNlcnMgdGhpcyBjb25mdXNpb24sDQo+IHdoZXJlIHBv c3NpYmxlLg0KPiANCj4gQm90aCB0aGUgSW50ZWwgU0RNWzRdIGFuZCB0aGUgWGVuIHRzYyBk b2N1bWVudGF0aW9uIGV4cGxhaW4gdGhhdCBtYXJraW5nDQo+IGEgdHNjIGFzIGludmFyaWFu dCBtZWFucyB0aGF0IGl0IHNob3VsZCBiZSBjb25zaWRlcmVkIHN0YWJsZSBieSB0aGUgT1MN Cj4gYW5kIGlzIGVsaWJpbGUgdG8gYmUgdXNlZCBhcyBhIHdhbGwgY2xvY2sgc291cmNlLg0K PiANCj4gSW4gb3JkZXIgdG8gb2J0YWluIGJldHRlciBvdXQtb2YtdGhlLWJveCBwZXJmb3Jt YW5jZSwgYW5kIHJlZHVjZSB0aGUNCj4gbmVlZCBmb3IgdXNlciB0dW5pbmcsIGZvbGxvdyBr dm0ncyBhcHByb2FjaCBhbmQgZGVjcmVhc2UgdGhlIHhlbiBjbG9jaw0KPiByYXRpbmcgc28g dGhhdCB0c2MgaXMgcHJlZmVyYWJsZSwgaWYgaXQgaXMgaW52YXJpYW50LCBzdGFibGUsIGFu ZCB0aGUNCj4gdHNjIHdpbGwgbmV2ZXIgYmUgZW11bGF0ZWQuDQo+IA0KPiBbMV0gaHR0cHM6 Ly9hd3MuYW1hem9uLmNvbS9wcmVtaXVtc3VwcG9ydC9rbm93bGVkZ2UtY2VudGVyL21hbmFn ZS1lYzItbGludXgtY2xvY2stc291cmNlLw0KPiBbMl0gaHR0cHM6Ly93d3cuYnJlbmRhbmdy ZWdnLmNvbS9ibG9nLzIwMjEtMDktMjYvdGhlLXNwZWVkLW9mLXRpbWUuaHRtbA0KPiBbM10g aHR0cHM6Ly94ZW5iaXRzLnhlbi5vcmcvZG9jcy91bnN0YWJsZS9tYW4veGVuLXRzY21vZGUu Ny5odG1sDQo+IFs0XSBJbnRlbCA2NCBhbmQgSUEtMzIgQXJjaGl0ZWN0dXJlcyBTb2Z3YXJl IERldmVsb3BlcidzIE1hbnVhbCBWb2x1bWUNCj4gICAgICAzYjogU3lzdGVtIFByb2dyYW1t aW5nIEd1aWRlLCBQYXJ0IDIsIFNlY3Rpb24gMTcuMTcuMSwgSW52YXJpYW50IFRTQw0KPiAN Cj4gU2lnbmVkLW9mZi1ieTogS3Jpc3RlciBKb2hhbnNlbiA8a2pseEB0ZW1wbGVvZnN0dXBp ZC5jb20+DQo+IENvZGUtcmV2aWV3ZWQtYnk6IERhdmlkIFJlYXZlciA8bWVAZGF2aWRyZWF2 ZXIuY29tPg0KDQpQdXNoZWQgdG86IHhlbi90aXAuZ2l0IGZvci1saW51cy02LjMNCg0KDQpK dWVyZ2VuDQoNCg== --------------ySj6xqIXWWVvBswX3GYsWw0f Content-Type: application/pgp-keys; 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