From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F084BC49ED6 for ; Wed, 11 Sep 2019 11:33:50 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CCFC92089F for ; Wed, 11 Sep 2019 11:33:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CCFC92089F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; 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 1i80sF-0006kn-U2; Wed, 11 Sep 2019 11:33:23 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1i80sE-0006ki-T3 for xen-devel@lists.xenproject.org; Wed, 11 Sep 2019 11:33:22 +0000 X-Inumbo-ID: f53f2752-d487-11e9-978d-bc764e2007e4 Received: from foss.arm.com (unknown [217.140.110.172]) by us1-rack-iad1.inumbo.com (Halon) with ESMTP id f53f2752-d487-11e9-978d-bc764e2007e4; Wed, 11 Sep 2019 11:33:21 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id EA07828; Wed, 11 Sep 2019 04:33:20 -0700 (PDT) Received: from [10.37.9.92] (unknown [10.37.9.92]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6CD343F59C; Wed, 11 Sep 2019 04:33:17 -0700 (PDT) To: Juergen Gross , xen-devel@lists.xenproject.org References: <20190809145833.1020-1-jgross@suse.com> <20190809145833.1020-36-jgross@suse.com> From: Julien Grall Message-ID: <6cc5a569-04a2-ab5e-4015-60cedb986b5e@arm.com> Date: Wed, 11 Sep 2019 12:33:14 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190809145833.1020-36-jgross@suse.com> Content-Language: en-US Subject: Re: [Xen-devel] [PATCH v2 35/48] xen/sched: add fall back to idle vcpu when scheduling unit 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: Stefano Stabellini , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Tim Deegan , Jan Beulich , Dario Faggioli , Volodymyr Babchuk , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" SGkgSnVlcmdlbiwKCk9uIDgvOS8xOSAzOjU4IFBNLCBKdWVyZ2VuIEdyb3NzIHdyb3RlOgo+IFdo ZW4gc2NoZWR1bGluZyBhbiB1bml0IHdpdGggbXVsdGlwbGUgdmNwdXMgdGhlcmUgaXMgbm8gZ3Vh cmFudGVlIGFsbAo+IHZjcHVzIGFyZSBhdmFpbGFibGUgKGUuZy4gYWJvdmUgbWF4dmNwdXMgb3Ig dmNwdSBvZmZsaW5lKS4gRmFsbCBiYWNrIHRvCj4gaWRsZSB2Y3B1IG9mIHRoZSBjdXJyZW50IGNw dSBpbiB0aGF0IGNhc2UuIFRoaXMgcmVxdWlyZXMgdG8gc3RvcmUgdGhlCj4gY29ycmVjdCBzY2hl ZHVsZV91bml0IHBvaW50ZXIgaW4gdGhlIGlkbGUgdmNwdSBhcyBsb25nIGFzIGl0IHVzZWQgYXMK PiBmYWxsYmFjayB2Y3B1Lgo+IAo+IEluIG9yZGVyIHRvIG1vZGlmeSB0aGUgcnVuc3RhdGVzIG9m IHRoZSBjb3JyZWN0IHZjcHVzIHdoZW4gc3dpdGNoaW5nCj4gc2NoZWR1bGUgdW5pdHMgbWVyZ2Ug c2NoZWRfdW5pdF9ydW5zdGF0ZV9jaGFuZ2UoKSBpbnRvCj4gc2NoZWRfc3dpdGNoX3VuaXRzKCkg YW5kIGxvb3Agb3ZlciB0aGUgYWZmZWN0ZWQgcGh5c2ljYWwgY3B1cyBpbnN0ZWFkCj4gb2YgdGhl IHVuaXQncyB2Y3B1cy4gVGhpcyBpbiB0dXJuIHJlcXVpcmVzIGFuIGFjY2VzcyBmdW5jdGlvbiB0 byB0aGUKPiBjdXJyZW50IHZhcmlhYmxlIG9mIG90aGVyIGNwdXMuCj4gCj4gVG9kYXkgY29udGV4 dF9zYXZlZCgpIGlzIGNhbGxlZCBpbiBjYXNlIHByZXZpb3VzIGFuZCBuZXh0IHZjcHVzIGRpZmZl cgo+IHdoZW4gZG9pbmcgYSBjb250ZXh0IHN3aXRjaC4gV2l0aCBhbiBpZGxlIHZjcHUgYmVpbmcg Y2FwYWJsZSB0byBiZSBhCj4gc3Vic3RpdHV0ZSBmb3IgYW4gb2ZmbGluZSB2Y3B1IHRoaXMgaXMg cHJvYmxlbWF0aWMgd2hlbiBzd2l0Y2hpbmcgdG8KPiBhbiBpZGxlIHNjaGVkdWxpbmcgdW5pdC4g QW4gaWRsZSBwcmV2aW91cyB2Y3B1IGxlYXZlcyB1cyBpbiBkb3VidCB3aGljaAo+IHNjaGVkdWxl IHVuaXQgd2FzIGFjdGl2ZSBwcmV2aW91c2x5LCBzbyBzYXZlIHRoZSBwcmV2aW91cyB1bml0IHBv aW50ZXIKPiBpbiB0aGUgcGVyLXNjaGVkdWxlIHJlc291cmNlIGFyZWEgYW5kIHVzZSBpdHMgdmFs dWUgYmVpbmcgbm9uLU5VTEwgYXMKPiBhIGhpbnQgd2hldGhlciBjb250ZXh0X3NhdmVkKCkgc2hv dWxkIGJlIGNhbGxlZC4KPiAKPiBXaGVuIHJ1bm5pbmcgYW4gaWRsZSB2Y3B1IGluIGEgbm9uLWlk bGUgc2NoZWR1bGluZyB1bml0IHVzZSBhIHNwZWNpZmljCj4gZ3Vlc3QgaWRsZSBsb29wIG5vdCBw ZXJmb3JtaW5nIGFueSB0YXNrbGV0cyBhbmQgbGl2ZXBhdGNoaW5nIGluIG9yZGVyCj4gdG8gYXZv aWQgcG9wdWxhdGluZyB0aGUgY3B1IGNhY2hlcyB3aXRoIG1lbW9yeSB1c2VkIGJ5IG90aGVyIGRv bWFpbnMKPiAoYXMgZmFyIGFzIHBvc3NpYmxlKS4gU29mdGlycXMgYXJlIGNvbnNpZGVyZWQgdG8g YmUgc2F2ZS4KPiAKPiBJbiBvcmRlciB0byBhdm9pZCBsaXZlcGF0Y2hpbmcgd2hlbiBnb2luZyB0 byBndWVzdCBpZGxlIGFub3RoZXIKPiB2YXJpYW50IG9mIHJlc2V0X3N0YWNrX2FuZF9qdW1wKCkg bm90IGNhbGxpbmcgY2hlY2tfZm9yX2xpdmVwYXRjaF93b3JrCj4gaXMgbmVlZGVkLgo+IAo+IFNp Z25lZC1vZmYtYnk6IEp1ZXJnZW4gR3Jvc3MgPGpncm9zc0BzdXNlLmNvbT4KCkkgaGF2ZW4ndCBs b29rZWQgYXQgdGhlIGZ1bGwgcGF0Y2guIFRoZSBhcm0gY2hhbmdlIGlzIHF1aXRlIG1pbmltYWws IHNvIApmb3IganVzdCBhcm0tYml0czoKCkFja2VkLWJ5OiBKdWxpZW4gR3JhbGwgPGp1bGllbi5n cmFsbEBhcm0uY29tPgoKQ2hlZXJzLAoKLS0gCkp1bGllbiBHcmFsbAoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApY ZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9y Zy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA==