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d="scan'208";a="1370689" To: Jan Beulich References: <5CD2CDEC020000780022CC95@prv1-mh.provo.novell.com> <5CD2CFBB020000780022CCC6@prv1-mh.provo.novell.com> <562b4893-82eb-2ae6-3945-f80fdcc8c7a8@citrix.com> <5CF8CC0F0200007800235C8C@prv1-mh.provo.novell.com> <5CF8FC580200007800235E9A@prv1-mh.provo.novell.com> From: Andrew Cooper Openpgp: preference=signencrypt Autocrypt: addr=andrew.cooper3@citrix.com; prefer-encrypt=mutual; keydata= mQINBFLhNn8BEADVhE+Hb8i0GV6mihnnr/uiQQdPF8kUoFzCOPXkf7jQ5sLYeJa0cQi6Penp VtiFYznTairnVsN5J+ujSTIb+OlMSJUWV4opS7WVNnxHbFTPYZVQ3erv7NKc2iVizCRZ2Kxn srM1oPXWRic8BIAdYOKOloF2300SL/bIpeD+x7h3w9B/qez7nOin5NzkxgFoaUeIal12pXSR Q354FKFoy6Vh96gc4VRqte3jw8mPuJQpfws+Pb+swvSf/i1q1+1I4jsRQQh2m6OTADHIqg2E ofTYAEh7R5HfPx0EXoEDMdRjOeKn8+vvkAwhviWXTHlG3R1QkbE5M/oywnZ83udJmi+lxjJ5 YhQ5IzomvJ16H0Bq+TLyVLO/VRksp1VR9HxCzItLNCS8PdpYYz5TC204ViycobYU65WMpzWe LFAGn8jSS25XIpqv0Y9k87dLbctKKA14Ifw2kq5OIVu2FuX+3i446JOa2vpCI9GcjCzi3oHV e00bzYiHMIl0FICrNJU0Kjho8pdo0m2uxkn6SYEpogAy9pnatUlO+erL4LqFUO7GXSdBRbw5 gNt25XTLdSFuZtMxkY3tq8MFss5QnjhehCVPEpE6y9ZjI4XB8ad1G4oBHVGK5LMsvg22PfMJ ISWFSHoF/B5+lHkCKWkFxZ0gZn33ju5n6/FOdEx4B8cMJt+cWwARAQABtClBbmRyZXcgQ29v cGVyIDxhbmRyZXcuY29vcGVyM0BjaXRyaXguY29tPokCOgQTAQgAJAIbAwULCQgHAwUVCgkI CwUWAgMBAAIeAQIXgAUCWKD95wIZAQAKCRBlw/kGpdefoHbdD/9AIoR3k6fKl+RFiFpyAhvO 59ttDFI7nIAnlYngev2XUR3acFElJATHSDO0ju+hqWqAb8kVijXLops0gOfqt3VPZq9cuHlh IMDquatGLzAadfFx2eQYIYT+FYuMoPZy/aTUazmJIDVxP7L383grjIkn+7tAv+qeDfE+txL4 SAm1UHNvmdfgL2/lcmL3xRh7sub3nJilM93RWX1Pe5LBSDXO45uzCGEdst6uSlzYR/MEr+5Z JQQ32JV64zwvf/aKaagSQSQMYNX9JFgfZ3TKWC1KJQbX5ssoX/5hNLqxMcZV3TN7kU8I3kjK mPec9+1nECOjjJSO/h4P0sBZyIUGfguwzhEeGf4sMCuSEM4xjCnwiBwftR17sr0spYcOpqET ZGcAmyYcNjy6CYadNCnfR40vhhWuCfNCBzWnUW0lFoo12wb0YnzoOLjvfD6OL3JjIUJNOmJy RCsJ5IA/Iz33RhSVRmROu+TztwuThClw63g7+hoyewv7BemKyuU6FTVhjjW+XUWmS/FzknSi dAG+insr0746cTPpSkGl3KAXeWDGJzve7/SBBfyznWCMGaf8E2P1oOdIZRxHgWj0zNr1+ooF /PzgLPiCI4OMUttTlEKChgbUTQ+5o0P080JojqfXwbPAyumbaYcQNiH1/xYbJdOFSiBv9rpt TQTBLzDKXok86LkCDQRS4TZ/ARAAkgqudHsp+hd82UVkvgnlqZjzz2vyrYfz7bkPtXaGb9H4 Rfo7mQsEQavEBdWWjbga6eMnDqtu+FC+qeTGYebToxEyp2lKDSoAsvt8w82tIlP/EbmRbDVn 7bhjBlfRcFjVYw8uVDPptT0TV47vpoCVkTwcyb6OltJrvg/QzV9f07DJswuda1JH3/qvYu0p vjPnYvCq4NsqY2XSdAJ02HrdYPFtNyPEntu1n1KK+gJrstjtw7KsZ4ygXYrsm/oCBiVW/OgU g/XIlGErkrxe4vQvJyVwg6YH653YTX5hLLUEL1NS4TCo47RP+wi6y+TnuAL36UtK/uFyEuPy wwrDVcC4cIFhYSfsO0BumEI65yu7a8aHbGfq2lW251UcoU48Z27ZUUZd2Dr6O/n8poQHbaTd 6bJJSjzGGHZVbRP9UQ3lkmkmc0+XCHmj5WhwNNYjgbbmML7y0fsJT5RgvefAIFfHBg7fTY/i kBEimoUsTEQz+N4hbKwo1hULfVxDJStE4sbPhjbsPCrlXf6W9CxSyQ0qmZ2bXsLQYRj2xqd1 bpA+1o1j2N4/au1R/uSiUFjewJdT/LX1EklKDcQwpk06Af/N7VZtSfEJeRV04unbsKVXWZAk uAJyDDKN99ziC0Wz5kcPyVD1HNf8bgaqGDzrv3TfYjwqayRFcMf7xJaL9xXedMcAEQEAAYkC HwQYAQgACQUCUuE2fwIbDAAKCRBlw/kGpdefoG4XEACD1Qf/er8EA7g23HMxYWd3FXHThrVQ HgiGdk5Yh632vjOm9L4sd/GCEACVQKjsu98e8o3ysitFlznEns5EAAXEbITrgKWXDDUWGYxd pnjj2u+GkVdsOAGk0kxczX6s+VRBhpbBI2PWnOsRJgU2n10PZ3mZD4Xu9kU2IXYmuW+e5KCA vTArRUdCrAtIa1k01sPipPPw6dfxx2e5asy21YOytzxuWFfJTGnVxZZSCyLUO83sh6OZhJkk b9rxL9wPmpN/t2IPaEKoAc0FTQZS36wAMOXkBh24PQ9gaLJvfPKpNzGD8XWR5HHF0NLIJhgg 4ZlEXQ2fVp3XrtocHqhu4UZR4koCijgB8sB7Tb0GCpwK+C4UePdFLfhKyRdSXuvY3AHJd4CP 4JzW0Bzq/WXY3XMOzUTYApGQpnUpdOmuQSfpV9MQO+/jo7r6yPbxT7CwRS5dcQPzUiuHLK9i nvjREdh84qycnx0/6dDroYhp0DFv4udxuAvt1h4wGwTPRQZerSm4xaYegEFusyhbZrI0U9tJ B8WrhBLXDiYlyJT6zOV2yZFuW47VrLsjYnHwn27hmxTC/7tvG3euCklmkn9Sl9IAKFu29RSo d5bD8kMSCYsTqtTfT6W4A3qHGvIDta3ptLYpIAOD2sY3GYq2nf3Bbzx81wZK14JdDDHUX2Rs 6+ahAA== Message-ID: <1c8264aa-78bc-ec40-e69d-2d5ab5cca655@citrix.com> Date: Thu, 6 Jun 2019 12:45:43 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <5CF8FC580200007800235E9A@prv1-mh.provo.novell.com> Content-Language: en-GB 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 , Roger Pau Monne Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" T24gMDYvMDYvMjAxOSAxMjo0MywgSmFuIEJldWxpY2ggd3JvdGU6Cj4+Pj4gT24gMDYuMDYuMTkg YXQgMTM6MzQsIDxhbmRyZXcuY29vcGVyM0BjaXRyaXguY29tPiB3cm90ZToKPj4gT24gMDYvMDYv MjAxOSAwOToxNywgSmFuIEJldWxpY2ggd3JvdGU6Cj4+Pj4+PiBPbiAwNS4wNi4xOSBhdCAxOTox NSwgPGFuZHJldy5jb29wZXIzQGNpdHJpeC5jb20+IHdyb3RlOgo+Pj4+IE9uIDA4LzA1LzIwMTkg MTM6NDYsIEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+PiBAQCAtMTEzMCw4ICsxMTMwLDEwIEBAIHN0 YXRpYyB2b2lkIGlycV9ndWVzdF9lb2lfdGltZXJfZm4odm9pZAo+Pj4+PiAgICAgICAgICB9Cj4+ Pj4+ICAgICAgfQo+Pj4+PiAgCj4+Pj4+IC0gICAgaWYgKCBhY3Rpb24tPmluX2ZsaWdodCAhPSAw ICkKPj4+Pj4gLSAgICAgICAgZ290byBvdXQ7Cj4+Pj4+ICsgICAgaWYgKCBhY3Rpb24tPmluX2Zs aWdodCApCj4+Pj4+ICsgICAgICAgIHByaW50ayhYRU5MT0dfR19XQVJOSU5HCj4+Pj4+ICsgICAg ICAgICAgICAgICAiSVJRJWQ6ICVkIGhhbmRsZXJzIHN0aWxsIGluIGZsaWdodCBhdCBmb3JjZWQg RU9JXG4iLAo+Pj4+PiArICAgICAgICAgICAgICAgZGVzYy0+aXJxLCBhY3Rpb24tPmluX2ZsaWdo dCk7Cj4+Pj4gQUZBQ0lULCB0aGlzIGNvbmRpdGlvbiBjYW4gYmUgdHJpZ2dlcmVkIGJ5IGEgYnVn Z3kvbWFsaWNpb3VzIGd1ZXN0LCBieQo+Pj4+IGl0IHNpbXBseSBpZ25vcmluZyBvciBtYXNraW5n IHRoZSBsaW5lIGludGVycnVwdCBhdCB0aGUgdklPLUFQSUMuCj4+PiBJIGRvbid0IHRoaW5rIGl0 IGNhbiwgbm8uIE9yIGVsc2UgdGhlIEFTU0VSVF9VTlJFQUNIQUJMRSgpIGJlbG93Cj4+PiBoZXJl IHdvdWxkIGJlIGludmFsaWQgdG8gYWRkLgo+PiBXaGljaCBBU1NFUlRfVU5SRUFDSEFCTEUoKSA/ ICBJIGtub3cgUm9nZXIgYXNrZWQgZm9yIG9uZSwgYnV0IEkgZG9uJ3QKPj4gc2VlIGl0IGFueXdo ZXJlIGluIHRoZSBjb2RlLgo+IEJlY2F1c2Ugc28gZmFyIHRoZXJlIHdhcyBubyByZWFsIHJlYXNv biB0byByZS1wb3N0LiBJdCdzIHJpZ2h0IGhlcmUsCj4gYXMgUm9nZXIgZGlkIGFzayBmb3IsIGFu ZCBhcyBJIGRpZCAoaGVzaXRhbnRseSkgYWdyZWU6Cj4KPiAgICAgaWYgKCBhY3Rpb24tPmluX2Zs aWdodCApCj4gICAgIHsKPiAgICAgICAgIHByaW50ayhYRU5MT0dfR19XQVJOSU5HCj4gICAgICAg ICAgICAgICAgIklSUSV1OiAlZC8lZCBoYW5kbGVyKHMpIHN0aWxsIGluIGZsaWdodCBhdCBmb3Jj ZWQgRU9JXG4iLAo+ICAgICAgICAgICAgICAgIGlycSwgYWN0aW9uLT5pbl9mbGlnaHQsIGFjdGlv bi0+bnJfZ3Vlc3RzKTsKPiAgICAgICAgIEFTU0VSVF9VTlJFQUNIQUJMRSgpOwo+ICAgICB9Cj4K Pj4+PiBUaGUgbWVzc2FnZSB3b3VsZCBiZSBmYXIgbW9yZSB1c2VmdWwgaWYgaXQgaWRlbnRpZmll ZCB0aGUgZG9tYWluIGluCj4+Pj4gcXVlc3Rpb24sIHdoaWNoIGxvb2tzIGxpa2UgaXQgY2FuIGJl IG9idGFpbmVkIGZyb20gdGhlIG1pZGRsZSBvZiB0aGUgbG9vcC4KPj4+IFRoYXQgdmVyeSBsb29w IGhhcyBqdXN0IHRha2VuIGNhcmUgb2YgZGVjcmVtZW50aW5nIC0+aW5fZmxpZ2h0IGZvcgo+Pj4g YWxsIHN1Y2ggZ3Vlc3RzLgo+Pj4KPj4+IEFsc28gbm90ZSB0aGF0IHRoZXJlIGNvdWxkIGJlIG1v cmUgdGhhbiBvbmUgb2ZmZW5kaW5nIGRvbWFpbiwgZm9yCj4+PiBzaGFyZWQgSVJRcy4gUGx1cyB0 aGUgbG9vcCB5b3UncmUgcmVmZXJyaW5nIHRvIGNhbiBzcGVjaWZpY2FsbHkgX25vdF8KPj4+IGJl IHVzZWQgZm9yIGlkZW50aWZ5aW5nIHRoZSBkb21haW4ocyksIGJlY2F1c2UgZm9yIHRoZSBvbmVz Cj4+PiBwcm9jZXNzZWQgdGhlcmUgd2UgX2RpZF8gZGVjcmVtZW50IC0+aW5fZmxpZ2h0LiBJZiB0 aGlzIG1lc3NhZ2UKPj4+IGdldHMgbG9nZ2VkLCB3ZSBzaW1wbHkgaGF2ZSBubyBpZGVhIHdoeSAt PmluX2ZsaWdodCBpcyBfc3RpbGxfIG5vbi0KPj4+IHplcm8uIFRoaXMgY291bGQgYmUgYSBCVUdf T04oKSwgYnV0IGl0IHNlZW1zIG1vcmUgaW4gbGluZSB3aXRoIG91cgo+Pj4gZ2VuZXJhbCBpZGVh IG9mIGhvdyB3ZSB3b3VsZCBsaWtlIHRvIGRlYWwgd2l0aCBzdWNoIGNhc2VzIHRvIHRyeQo+Pj4g YW5kIGtlZXAgdGhlIHN5c3RlbSBydW5uaW5nIGhlcmUgaW4gcmVsZWFzZSBidWlsZHMuCj4+IE9r IC0gbGV0cyBnbyB3aXRoIHRoaXMgZm9yIG5vdy4gIEl0IGlzIGEgbmV0IGltcHJvdmVtZW50LCBh bmQgd2UgY2FuCj4+IGV2YWx1YXRlIHRoZSBndWVzdC10cmlnZ2VyYWJpbGl0eSBhdCBhIGxhdGVy IHBvaW50Lgo+Pgo+PiBSZXZpZXdlZC1ieTogQW5kcmV3IENvb3BlciA8YW5kcmV3LmNvb3BlcjNA Y2l0cml4LmNvbT4KPiBUaGFua3MgbXVjaC4gSSdsbCBhc3N1bWUgdGhpcyBob2xkcyBhbHNvIGZv ciB0aGUgYWRqdXN0bWVudHMKPiByZXF1ZXN0ZWQgYnkgUm9nZXIuCgpGaW5lLsKgIEF0IGxlYXN0 IHRoYXQgc2hvdWxkIG1ha2UgdGhpbmdzIG9idmlvdXMgaW4gYSBkZWJ1ZyBidWlsZC4KCn5BbmRy ZXcKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1k ZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8v bGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=