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d="scan'208";a="515718" Date: Thu, 16 May 2019 15:44:54 +0200 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Jan Beulich Message-ID: <20190516134454.irapo7buz7w5mlru@Air-de-Roger> References: <5CD2CDEC020000780022CC95@prv1-mh.provo.novell.com> <5CD2CFBB020000780022CCC6@prv1-mh.provo.novell.com> <20190516113728.wnjbezwtaq45ijfb@Air-de-Roger> <5CDD5147020000780022F9F2@prv1-mh.provo.novell.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <5CDD5147020000780022F9F2@prv1-mh.provo.novell.com> User-Agent: NeoMutt/20180716 X-ClientProxiedBy: AMSPEX02CAS02.citrite.net (10.69.22.113) 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: Andrew Cooper , Wei Liu , xen-devel Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Message-ID: <20190516134454.tEU7rWCSDY30q8ivKG8bZQUZhbAH7XnCrKo56hO11k4@z> T24gVGh1LCBNYXkgMTYsIDIwMTkgYXQgMDY6MDI6MTVBTSAtMDYwMCwgSmFuIEJldWxpY2ggd3Jv dGU6Cj4gPj4+IE9uIDE2LjA1LjE5IGF0IDEzOjM3LCA8cm9nZXIucGF1QGNpdHJpeC5jb20+IHdy b3RlOgo+ID4gT24gV2VkLCBNYXkgMDgsIDIwMTkgYXQgMDY6NDY6NTFBTSAtMDYwMCwgSmFuIEJl dWxpY2ggd3JvdGU6Cj4gPj4gVGhlcmUncyBubyBwb2ludCBlbnRlcmluZyB0aGUgbG9vcCBpbiB0 aGUgZnVuY3Rpb24gaW4gdGhpcyBjYXNlLiBJbnN0ZWFkCj4gPj4gdGhlcmUgc3RpbGwgYmVpbmcg c29tZXRoaW5nIGluIGZsaWdodCBfYWZ0ZXJfIHRoZSBsb29wIHdvdWxkIGJlIGFuCj4gPj4gYWN0 dWFsIHByb2JsZW06IE5vIHRpbWVyIHdvdWxkIGJlIHJ1bm5pbmcgYW55bW9yZSBmb3IgaXNzdWlu ZyB0aGUgRU9JCj4gPj4gZXZlbnR1YWxseSwgYW5kIGhlbmNlIHRoaXMgSVJRIChhbmQgcG9zc2li bHkgbG93ZXIgcHJpb3JpdHkgb25lcykgd291bGQKPiA+PiBiZSBibG9ja2VkLCBwZXJoYXBzIGlu ZGVmaW5pdGVseS4KPiA+PiAKPiA+PiBJc3N1ZSBhIHdhcm5pbmcgaW5zdGVhZCBhbmQgcHJlZmVy IGJyZWFraW5nIHNvbWUgKHByZXN1bWFibHkKPiA+PiBtaXNiZWhhdmluZykgZ3Vlc3Qgb3ZlciBz dGFsbGluZyBwZXJoYXBzIHRoZSBlbnRpcmUgc3lzdGVtLgo+ID4+Cj4gPj4gU2lnbmVkLW9mZi1i eTogSmFuIEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgo+ID4+IAo+ID4+IC0tLSBhL3hlbi9h cmNoL3g4Ni9pcnEuYwo+ID4+ICsrKyBiL3hlbi9hcmNoL3g4Ni9pcnEuYwo+ID4+IEBAIC0xMTE1 LDcgKzExMTUsNyBAQCBzdGF0aWMgdm9pZCBpcnFfZ3Vlc3RfZW9pX3RpbWVyX2ZuKHZvaWQKPiA+ PiAgCj4gPj4gICAgICBhY3Rpb24gPSAoaXJxX2d1ZXN0X2FjdGlvbl90ICopZGVzYy0+YWN0aW9u Owo+ID4+ICAKPiA+PiAtICAgIGlmICggdGltZXJfaXNfYWN0aXZlKCZhY3Rpb24tPmVvaV90aW1l cikgKQo+ID4+ICsgICAgaWYgKCAhYWN0aW9uLT5pbl9mbGlnaHQgfHwgdGltZXJfaXNfYWN0aXZl KCZhY3Rpb24tPmVvaV90aW1lcikgKQo+ID4+ICAgICAgICAgIGdvdG8gb3V0Owo+ID4+ICAKPiA+ PiAgICAgIGlmICggYWN0aW9uLT5hY2tfdHlwZSAhPSBBQ0tUWVBFX05PTkUgKQo+ID4+IEBAIC0x MTMwLDggKzExMzAsMTAgQEAgc3RhdGljIHZvaWQgaXJxX2d1ZXN0X2VvaV90aW1lcl9mbih2b2lk Cj4gPj4gICAgICAgICAgfQo+ID4+ICAgICAgfQo+ID4+ICAKPiA+PiAtICAgIGlmICggYWN0aW9u LT5pbl9mbGlnaHQgIT0gMCApCj4gPj4gLSAgICAgICAgZ290byBvdXQ7Cj4gPj4gKyAgICBpZiAo IGFjdGlvbi0+aW5fZmxpZ2h0ICkKPiA+PiArICAgICAgICBwcmludGsoWEVOTE9HX0dfV0FSTklO Rwo+ID4+ICsgICAgICAgICAgICAgICAiSVJRJWQ6ICVkIGhhbmRsZXJzIHN0aWxsIGluIGZsaWdo dCBhdCBmb3JjZWQgRU9JXG4iLAo+ID4+ICsgICAgICAgICAgICAgICBkZXNjLT5pcnEsIGFjdGlv bi0+aW5fZmxpZ2h0KTsKPiA+IAo+ID4gQUZBSUNUIGFjdGlvbi0+aW5fZmxpZ2h0IHNob3VsZCBj b250YWluIHRoZSBudW1iZXIgb2YgZ3Vlc3RzIHBpcnFzCj4gPiB0aGF0IGhhdmUgdGhlIHBpcnEg bWFza2VkIChwaXJxLT5tYXNrZWQgPT0gdHJ1ZSksIGJlY2F1c2UgaW5fZmxpZ2h0IGlzCj4gPiBv bmx5IGluY3JlYXNlZCBieSBfX2RvX0lSUV9ndWVzdCB3aGVuIHRoZSBwaXJxIGlzIG5vdCBhbHJl YWR5IG1hc2tlZC4KPiA+IEF0IGd1ZXN0IEVPSSAoZGVzY19ndWVzdF9lb2kpIHRoZSBpbl9mbGln aHQgY291bnQgaXMgYWxzbyBvbmx5Cj4gPiBkZWNyZWFzZWQgaWYgdGhlIHBpcnEgaXMgdW5tYXNr ZWQuCj4gPiAKPiA+IEhlbmNlIEkgdGhpbmsgdGhpcyBjb25kaXRpb24gY291bGQgYmUgdHVybmVk IGludG8gYW4gQVNTRVJULCBidXQgSSdtCj4gPiBsaWtlbHkgbWlzc2luZyBzb21ldGhpbmcuCj4g Cj4gSSBkb24ndCB0aGluayB5b3UgYXJlLiBHb2luZyBmcm9tIGlmKCkgc3RyYWlnaHQgdG8gQVNT RVJUKCkgc2ltcGx5Cj4gc2VlbWVkIHRvbyBoYXJzaCB0byBtZSwgdGhlIG1vcmUgaW4gYSBzdWJz eXN0ZW0gd2hlcmUgSSBjb3VsZAo+IGVhc2lseSBoYXZlIG92ZXJsb29rZWQgc29tZSBjb3JuZXIg Y2FzZSwgZHVlIHRvIGhvdyBjb252b2x1dGVkCj4gc29tZSBvZiB0aGUgaW1wbGVtZW50YXRpb24g aXMuCgpJIGFncmVlIGl0J3MgcXVpdGUgY29udm9sdXRlZC4gSSB0aGluayBpdCB3b3VsZCBiZSBo ZWxwZnVsIHRvIGFkZCBhbgpBU1NFUlRfVU5SRUFDSEFCTEUgdG9nZXRoZXIgd2l0aCB0aGUgd2Fy bmluZyBtZXNzYWdlLiBXaXRoIHRoYXQ6CgpSZXZpZXdlZC1ieTogUm9nZXIgUGF1IE1vbm7DqSA8 cm9nZXIucGF1QGNpdHJpeC5jb20+CgpUaGFua3MsIFJvZ2VyLgoKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4t ZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9t YWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA==