From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roger Pau =?utf-8?B?TW9ubsOp?= Subject: Re: [PATCH 2/4] x86/IRQ: bail early from irq_guest_eoi_timer_fn() when nothing is in flight Date: Thu, 16 May 2019 13:37:28 +0200 Message-ID: <20190516113728.wnjbezwtaq45ijfb@Air-de-Roger> References: <5CD2CDEC020000780022CC95@prv1-mh.provo.novell.com> <5CD2CFBB020000780022CCC6@prv1-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hREhg-0002ec-74 for xen-devel@lists.xenproject.org; Thu, 16 May 2019 11:37:40 +0000 Content-Disposition: inline In-Reply-To: <5CD2CFBB020000780022CCC6@prv1-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Jan Beulich Cc: xen-devel , Wei Liu , Andrew Cooper List-Id: xen-devel@lists.xenproject.org T24gV2VkLCBNYXkgMDgsIDIwMTkgYXQgMDY6NDY6NTFBTSAtMDYwMCwgSmFuIEJldWxpY2ggd3Jv dGU6Cj4gVGhlcmUncyBubyBwb2ludCBlbnRlcmluZyB0aGUgbG9vcCBpbiB0aGUgZnVuY3Rpb24g aW4gdGhpcyBjYXNlLiBJbnN0ZWFkCj4gdGhlcmUgc3RpbGwgYmVpbmcgc29tZXRoaW5nIGluIGZs aWdodCBfYWZ0ZXJfIHRoZSBsb29wIHdvdWxkIGJlIGFuCj4gYWN0dWFsIHByb2JsZW06IE5vIHRp bWVyIHdvdWxkIGJlIHJ1bm5pbmcgYW55bW9yZSBmb3IgaXNzdWluZyB0aGUgRU9JCj4gZXZlbnR1 YWxseSwgYW5kIGhlbmNlIHRoaXMgSVJRIChhbmQgcG9zc2libHkgbG93ZXIgcHJpb3JpdHkgb25l cykgd291bGQKPiBiZSBibG9ja2VkLCBwZXJoYXBzIGluZGVmaW5pdGVseS4KPiAKPiBJc3N1ZSBh IHdhcm5pbmcgaW5zdGVhZCBhbmQgcHJlZmVyIGJyZWFraW5nIHNvbWUgKHByZXN1bWFibHkKPiBt aXNiZWhhdmluZykgZ3Vlc3Qgb3ZlciBzdGFsbGluZyBwZXJoYXBzIHRoZSBlbnRpcmUgc3lzdGVt Lgo+Cj4gU2lnbmVkLW9mZi1ieTogSmFuIEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgo+IAo+ IC0tLSBhL3hlbi9hcmNoL3g4Ni9pcnEuYwo+ICsrKyBiL3hlbi9hcmNoL3g4Ni9pcnEuYwo+IEBA IC0xMTE1LDcgKzExMTUsNyBAQCBzdGF0aWMgdm9pZCBpcnFfZ3Vlc3RfZW9pX3RpbWVyX2ZuKHZv aWQKPiAgCj4gICAgICBhY3Rpb24gPSAoaXJxX2d1ZXN0X2FjdGlvbl90ICopZGVzYy0+YWN0aW9u Owo+ICAKPiAtICAgIGlmICggdGltZXJfaXNfYWN0aXZlKCZhY3Rpb24tPmVvaV90aW1lcikgKQo+ ICsgICAgaWYgKCAhYWN0aW9uLT5pbl9mbGlnaHQgfHwgdGltZXJfaXNfYWN0aXZlKCZhY3Rpb24t PmVvaV90aW1lcikgKQo+ICAgICAgICAgIGdvdG8gb3V0Owo+ICAKPiAgICAgIGlmICggYWN0aW9u LT5hY2tfdHlwZSAhPSBBQ0tUWVBFX05PTkUgKQo+IEBAIC0xMTMwLDggKzExMzAsMTAgQEAgc3Rh dGljIHZvaWQgaXJxX2d1ZXN0X2VvaV90aW1lcl9mbih2b2lkCj4gICAgICAgICAgfQo+ICAgICAg fQo+ICAKPiAtICAgIGlmICggYWN0aW9uLT5pbl9mbGlnaHQgIT0gMCApCj4gLSAgICAgICAgZ290 byBvdXQ7Cj4gKyAgICBpZiAoIGFjdGlvbi0+aW5fZmxpZ2h0ICkKPiArICAgICAgICBwcmludGso WEVOTE9HX0dfV0FSTklORwo+ICsgICAgICAgICAgICAgICAiSVJRJWQ6ICVkIGhhbmRsZXJzIHN0 aWxsIGluIGZsaWdodCBhdCBmb3JjZWQgRU9JXG4iLAo+ICsgICAgICAgICAgICAgICBkZXNjLT5p cnEsIGFjdGlvbi0+aW5fZmxpZ2h0KTsKCkFGQUlDVCBhY3Rpb24tPmluX2ZsaWdodCBzaG91bGQg Y29udGFpbiB0aGUgbnVtYmVyIG9mIGd1ZXN0cyBwaXJxcwp0aGF0IGhhdmUgdGhlIHBpcnEgbWFz a2VkIChwaXJxLT5tYXNrZWQgPT0gdHJ1ZSksIGJlY2F1c2UgaW5fZmxpZ2h0IGlzCm9ubHkgaW5j cmVhc2VkIGJ5IF9fZG9fSVJRX2d1ZXN0IHdoZW4gdGhlIHBpcnEgaXMgbm90IGFscmVhZHkgbWFz a2VkLgpBdCBndWVzdCBFT0kgKGRlc2NfZ3Vlc3RfZW9pKSB0aGUgaW5fZmxpZ2h0IGNvdW50IGlz IGFsc28gb25seQpkZWNyZWFzZWQgaWYgdGhlIHBpcnEgaXMgdW5tYXNrZWQuCgpIZW5jZSBJIHRo aW5rIHRoaXMgY29uZGl0aW9uIGNvdWxkIGJlIHR1cm5lZCBpbnRvIGFuIEFTU0VSVCwgYnV0IEkn bQpsaWtlbHkgbWlzc2luZyBzb21ldGhpbmcuCgpUaGFua3MsIFJvZ2VyLgoKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlz dApYZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0 Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA== 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=-5.9 required=3.0 tests=FROM_EXCESS_BASE64, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_NEOMUTT 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 DCEA0C04AAF for ; 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client-ip=23.29.105.83; receiver=esa6.hc3370-68.iphmx.com; envelope-from="roger.pau@citrix.com"; x-sender="postmaster@MIAPEX02MSOL02.citrite.net"; x-conformance=sidf_compatible IronPort-SDR: K3G4oRP5rbszpICZk28P/vdhsSoozoKvpJbyprodXz6QzBNTWVHyIKc69RTevkbdCkUoOqcG95 Cn6/VvXJ2YfdVRAXbyjBxovrcFvtLjlpcTJzSyP1V4YDCbR38OvOf7Wdi/LkpftLYUuA8Fgb7B twwENLlIX7lZzpKeImyDdklM2s3qtlRSHsZkcXFocJKvvPmwsqhuaQZER7LwnbhHXELAYEcgLN 1h+Fkg/ynL/AwWbfNQinM4Vt74QRzH7fcSbzxJ8iDwVbSXMiNtNSadTYV4QXpC/yAhdCzOWqQD hE8= X-SBRS: 2.7 X-MesageID: 497650 X-Ironport-Server: esa6.hc3370-68.iphmx.com X-Remote-IP: 23.29.105.83 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.60,476,1549947600"; d="scan'208";a="497650" Date: Thu, 16 May 2019 13:37:28 +0200 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Jan Beulich Message-ID: <20190516113728.wnjbezwtaq45ijfb@Air-de-Roger> References: <5CD2CDEC020000780022CC95@prv1-mh.provo.novell.com> <5CD2CFBB020000780022CCC6@prv1-mh.provo.novell.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <5CD2CFBB020000780022CCC6@prv1-mh.provo.novell.com> User-Agent: NeoMutt/20180716 X-ClientProxiedBy: AMSPEX02CAS01.citrite.net (10.69.22.112) To AMSPEX02CL02.citrite.net (10.69.22.126) Subject: Re: [Xen-devel] [PATCH 2/4] x86/IRQ: bail early from irq_guest_eoi_timer_fn() when nothing is in flight 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 , Wei Liu , Andrew Cooper Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Message-ID: <20190516113728.kb008Leb9n900LTBQuPBYzeOfFlVUHsDQfvlSAJ-M_o@z> T24gV2VkLCBNYXkgMDgsIDIwMTkgYXQgMDY6NDY6NTFBTSAtMDYwMCwgSmFuIEJldWxpY2ggd3Jv dGU6Cj4gVGhlcmUncyBubyBwb2ludCBlbnRlcmluZyB0aGUgbG9vcCBpbiB0aGUgZnVuY3Rpb24g aW4gdGhpcyBjYXNlLiBJbnN0ZWFkCj4gdGhlcmUgc3RpbGwgYmVpbmcgc29tZXRoaW5nIGluIGZs aWdodCBfYWZ0ZXJfIHRoZSBsb29wIHdvdWxkIGJlIGFuCj4gYWN0dWFsIHByb2JsZW06IE5vIHRp bWVyIHdvdWxkIGJlIHJ1bm5pbmcgYW55bW9yZSBmb3IgaXNzdWluZyB0aGUgRU9JCj4gZXZlbnR1 YWxseSwgYW5kIGhlbmNlIHRoaXMgSVJRIChhbmQgcG9zc2libHkgbG93ZXIgcHJpb3JpdHkgb25l cykgd291bGQKPiBiZSBibG9ja2VkLCBwZXJoYXBzIGluZGVmaW5pdGVseS4KPiAKPiBJc3N1ZSBh IHdhcm5pbmcgaW5zdGVhZCBhbmQgcHJlZmVyIGJyZWFraW5nIHNvbWUgKHByZXN1bWFibHkKPiBt aXNiZWhhdmluZykgZ3Vlc3Qgb3ZlciBzdGFsbGluZyBwZXJoYXBzIHRoZSBlbnRpcmUgc3lzdGVt Lgo+Cj4gU2lnbmVkLW9mZi1ieTogSmFuIEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgo+IAo+ IC0tLSBhL3hlbi9hcmNoL3g4Ni9pcnEuYwo+ICsrKyBiL3hlbi9hcmNoL3g4Ni9pcnEuYwo+IEBA IC0xMTE1LDcgKzExMTUsNyBAQCBzdGF0aWMgdm9pZCBpcnFfZ3Vlc3RfZW9pX3RpbWVyX2ZuKHZv aWQKPiAgCj4gICAgICBhY3Rpb24gPSAoaXJxX2d1ZXN0X2FjdGlvbl90ICopZGVzYy0+YWN0aW9u Owo+ICAKPiAtICAgIGlmICggdGltZXJfaXNfYWN0aXZlKCZhY3Rpb24tPmVvaV90aW1lcikgKQo+ ICsgICAgaWYgKCAhYWN0aW9uLT5pbl9mbGlnaHQgfHwgdGltZXJfaXNfYWN0aXZlKCZhY3Rpb24t PmVvaV90aW1lcikgKQo+ICAgICAgICAgIGdvdG8gb3V0Owo+ICAKPiAgICAgIGlmICggYWN0aW9u LT5hY2tfdHlwZSAhPSBBQ0tUWVBFX05PTkUgKQo+IEBAIC0xMTMwLDggKzExMzAsMTAgQEAgc3Rh dGljIHZvaWQgaXJxX2d1ZXN0X2VvaV90aW1lcl9mbih2b2lkCj4gICAgICAgICAgfQo+ICAgICAg fQo+ICAKPiAtICAgIGlmICggYWN0aW9uLT5pbl9mbGlnaHQgIT0gMCApCj4gLSAgICAgICAgZ290 byBvdXQ7Cj4gKyAgICBpZiAoIGFjdGlvbi0+aW5fZmxpZ2h0ICkKPiArICAgICAgICBwcmludGso WEVOTE9HX0dfV0FSTklORwo+ICsgICAgICAgICAgICAgICAiSVJRJWQ6ICVkIGhhbmRsZXJzIHN0 aWxsIGluIGZsaWdodCBhdCBmb3JjZWQgRU9JXG4iLAo+ICsgICAgICAgICAgICAgICBkZXNjLT5p cnEsIGFjdGlvbi0+aW5fZmxpZ2h0KTsKCkFGQUlDVCBhY3Rpb24tPmluX2ZsaWdodCBzaG91bGQg Y29udGFpbiB0aGUgbnVtYmVyIG9mIGd1ZXN0cyBwaXJxcwp0aGF0IGhhdmUgdGhlIHBpcnEgbWFz a2VkIChwaXJxLT5tYXNrZWQgPT0gdHJ1ZSksIGJlY2F1c2UgaW5fZmxpZ2h0IGlzCm9ubHkgaW5j cmVhc2VkIGJ5IF9fZG9fSVJRX2d1ZXN0IHdoZW4gdGhlIHBpcnEgaXMgbm90IGFscmVhZHkgbWFz a2VkLgpBdCBndWVzdCBFT0kgKGRlc2NfZ3Vlc3RfZW9pKSB0aGUgaW5fZmxpZ2h0IGNvdW50IGlz IGFsc28gb25seQpkZWNyZWFzZWQgaWYgdGhlIHBpcnEgaXMgdW5tYXNrZWQuCgpIZW5jZSBJIHRo aW5rIHRoaXMgY29uZGl0aW9uIGNvdWxkIGJlIHR1cm5lZCBpbnRvIGFuIEFTU0VSVCwgYnV0IEkn bQpsaWtlbHkgbWlzc2luZyBzb21ldGhpbmcuCgpUaGFua3MsIFJvZ2VyLgoKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlz dApYZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0 Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA==