From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tamas K Lengyel Subject: Re: Weird altp2m behaviour when switching early to a new view Date: Wed, 11 Apr 2018 14:17:51 -0600 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from all-amaz-eas1.inumbo.com ([34.197.232.57]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1f6MCQ-00010l-Em for xen-devel@lists.xenproject.org; Wed, 11 Apr 2018 20:18:34 +0000 Received: by mail-wm0-f45.google.com with SMTP id r191so6683173wmg.4 for ; Wed, 11 Apr 2018 13:18:33 -0700 (PDT) Received: from mail-wm0-f44.google.com (mail-wm0-f44.google.com. [74.125.82.44]) by smtp.gmail.com with ESMTPSA id v21sm1196342edb.75.2018.04.11.13.18.31 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 11 Apr 2018 13:18:32 -0700 (PDT) Received: by mail-wm0-f44.google.com with SMTP id b127so6756052wmf.5 for ; Wed, 11 Apr 2018 13:18:31 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Razvan Cojocaru Cc: "Tian, Kevin" , Andrew Cooper , Tim Deegan , George Dunlap , Jun Nakajima , Xen-devel List-Id: xen-devel@lists.xenproject.org T24gV2VkLCBBcHIgMTEsIDIwMTggYXQgMTI6MzkgQU0sIFJhenZhbiBDb2pvY2FydQo8cmNvam9j YXJ1QGJpdGRlZmVuZGVyLmNvbT4gd3JvdGU6Cj4gT24gMDQvMDkvMjAxOCAwNToxMiBQTSwgR2Vv cmdlIER1bmxhcCB3cm90ZToKPj4gVGhlIG9idmlvdXMgcGxhY2UgdG8gbG9vayBpcyB0aGUgbG9n ZGlydHl2cmFtIGZ1bmN0aW9uYWxpdHksIHdoaWNoIGlzCj4+IHVzZWQgdG8gbWFrZSBpdCBlYXNp ZXIgZm9yIFFFTVUgdG8gZmlndXJlIG91dCB3aGljaCBiaXRzIG9mIHRoZSBkaXNwbGF5Cj4+IGJ1 ZmZlciBoYXZlIGJlZW4gbW9kaWZpZWQuICBPbmUgb2YgdGhlIGJpZyByZWFzb25zIHRoZSBhbHRw Mm0KPj4gZnVuY3Rpb25hbGl0eSBpcyBzdGlsbCBjb25zaWRlcmVkICJleHBlcmltZW50YWwiIGlz IHRoYXQgdGhlc2Ugc29ydHMgb2YKPj4gaW50ZXJhY3Rpb25zIHdlcmUgbmV2ZXIgY2FyZWZ1bGx5 IHRob3VnaHQgb3V0Lgo+Cj4gR2VvcmdlIChhbmQgQWxleGV5KSwgdGhhbmtzIGZvciB0aGUgaGVs cCEKPgo+IEkndmUgbWFuYWdlZCB0byBmaW5kIG91dCB3aHkgdGhpcyBpcyBoYXBwZW5pbmcsIHRo b3VnaCBJIGRvbid0IHlldCBoYXZlCj4gYSBzb2x1dGlvbiBmb3IgaXQuIEFmdGVyIG11Y2ggZGVi dWdnaW5nLCBpdCB0dXJucyBvdXQgdGhhdCB0aGUKPiAicDJtX2lzX3JhbShwMm10KSIgdGVzdCBp biBodm1faGFwX25lc3RlZF9wYWdlX2ZhdWx0KCkgZmFpbHMgaWYgSSBzd2l0Y2gKPiB0byB0aGUg bmV3IGFsdHAybSB2aWV3IGZhc3QgZW5vdWdoLCBhbmQgdGhhdCBpbiB0dXJuIGRpc2FibGVzIHRo ZQo+IGxvZ2RpcnR5IHByb2Nlc3NpbmcgZ2F0ZWQgb24gaXQ6Cj4KPiAvKiBTcHVyaW91cyBmYXVs dD8gUG9EIGFuZCBsb2ctZGlydHkgYWxzbyB0YWtlIHRoaXMgcGF0aC4gKi8KPiBpZiAoIHAybV9p c19yYW0ocDJtdCkgKQo+IHsKPiAgICAgcmMgPSAxOwo+ICAgICAvKgo+ICAgICAgKiBQYWdlIGxv ZyBkaXJ0eSBpcyBhbHdheXMgZG9uZSB3aXRoIG9yZGVyIDAuIElmIHRoaXMgbWZuIHJlc2lkZXMK PiAgICAgICogaW4gYSBsYXJnZSBwYWdlLCB3ZSBkbyBub3QgY2hhbmdlIG90aGVyIHBhZ2VzIHR5 cGUgd2l0aGluIHRoYXQKPiAgICAgICogbGFyZ2UgcGFnZS4KPiAgICAgICovCj4gICAgIGlmICgg bnBmZWMud3JpdGVfYWNjZXNzICkKPiAgICAgewo+ICAgICAgICAgcGFnaW5nX21hcmtfcGZuX2Rp cnR5KGN1cnJkLCBfcGZuKGdmbikpOwo+ICAgICAgICAgLyoKPiAgICAgICAgICAqIElmIHAybSBp cyByZWFsbHkgYW4gYWx0cDJtLCB1bmxvY2sgaGVyZSB0byBhdm9pZCBsb2NrCj4gICAgICAgICAg KiBvcmRlcmluZyB2aW9sYXRpb24gd2hlbiB0aGUgY2hhbmdlIGJlbG93IGlzIHByb3BhZ2F0ZWQK PiAgICAgICAgICAqIGZyb20gaG9zdCBwMm0uCj4gICAgICAgICAgKi8KPiAgICAgICAgIGlmICgg YXAybV9hY3RpdmUgKQo+ICAgICAgICAgICAgIF9fcHV0X2dmbihwMm0sIGdmbik7Cj4gICAgICAg ICBwMm1fY2hhbmdlX3R5cGVfb25lKGN1cnJkLCBnZm4sIHAybV9yYW1fbG9nZGlydHksIHAybV9y YW1fcncpOwo+ICAgICAgICAgX19wdXRfZ2ZuKGFwMm1fYWN0aXZlID8gaG9zdHAybSA6IHAybSwg Z2ZuKTsKPgo+ICAgICAgICAgZ290byBvdXQ7Cj4gICAgIH0KPiAgICAgZ290byBvdXRfcHV0X2dm bjsKPiB9Cj4KPiBJIHRoaW5rIHRoaXMgaXMgbGlrZWx5IGJlY2F1c2Ugc3dpdGNoaW5nIHRvIHRo ZSBuZXcgRVBUIHZpZXcgbG9zZXMKPiBpbmZvcm1hdGlvbiBzdG9yZWQgd2hlbiBwcmV2aW91c2x5 IHdvcmtpbmcgd2l0aCB0aGUgZGVmYXVsdCBvbmUsIGluIHRoaXMKPiBjYXNlIHdoaWxlIHRoYXQg d29yayBoYXMgbm90IGZpbmlzaGVkIChpZiB0aGF0J3MgdGhlIGNhc2UsIGNyZWF0aW5nIGEKPiBu ZXcgYWx0cDJtIHZpZXcgc2hvdWxkIGFsc28gc29tZWhvdyBpbmhlcml0IHRoZSBoaXN0b3J5IG9m IHZpZXcgMCAtIHdoZW4KPiBkb2luZyBzZXRfYWNjZXNzKCkgb24gdmlldyAwIHRoZSBjaGFuZ2Vz IHByb3BhZ2F0ZSB0byBhbGwgZXhpc3RlbnQKPiBhbHRwMm0gdmlld3MsIGJ1dCBJIGRvbid0IHRo aW5rIHRoYXQgaGFwcGVucyB3aGVuIGEgbmV3IHZpZXcgaXMgY3JlYXRlZDoKPiB0aGF0IHN0YXJ0 cyB3aXRoIGEgY2xlYW4gc2xhdGUpLgo+Cj4gQWxzbyByZWxhdGVkIHRvIHRoaXMgcGFydCBvZiB0 aGUgYWx0cDJtIGRlc2lnbiwgSSd2ZSBhbHNvIG5vdGljZWQgdGhhdAo+IGNyZWF0aW5nIGEgbmV3 IEVQVCB2aWV3IHdpdGggbGlieGMgaW52b2x2ZXMgdGhpcyBmdW5jdGlvbjoKPgo+IGludCB4Y19h bHRwMm1fY3JlYXRlX3ZpZXcoeGNfaW50ZXJmYWNlICpoYW5kbGUsIHVpbnQzMl90IGRvbWlkLAo+ ICAgICAgICAgICAgICAgICAgICAgICAgICAgeGVubWVtX2FjY2Vzc190IGRlZmF1bHRfYWNjZXNz LAo+ICAgICAgICAgICAgICAgICAgICAgICAgICAgdWludDE2X3QgKnZpZXdfaWQpOwo+Cj4gSG93 ZXZlciwgZGVmYXVsdF9hY2Nlc3MgaXMgY29tcGxldGVseSBpZ25vcmVkLiBJZiB0aGlzIHdhcyBt ZWFudCB0bwo+IHJlc2V0IGFsbCBwYWdlcyB0byB0aGF0IGFjY2VzcyBpdCdzIHRyaXZpYWwgdG8g d2lyZSBpdCBpbiBpbnRvIHRoZQo+IGh5cGVydmlzb3IgKHdlIGNvdWxkIGp1c3QgaXRlcmF0ZSB0 aHJvdWdoIGFsbCBndWVzdCBwYWdlcyBmcm9tIDAgdG8KPiBtYXhfZ3BmbiBhbmQgc2V0IHRoZSBh Y2Nlc3MpIC0gYnV0IGluIGxpZ2h0IG9mIHRoaXMgaXNzdWUgdGhhdCdzIG5vdCBhCj4gZ29vZCB0 aGluZyB0byBkby4gT3IsIHJhdGhlciwgaXQgd2FzIG1lYW50IHRvIHNwZWNpZnkgdGhlIGRlZmF1 bHRfYWNjZXNzCj4gZm9yIG5ldyBwYWdlcyB3aGVyZSBpdCBpcyBub3QgZXhwbGljaXRseSBzcGVj aWZpZWQ/CgpJIGRvbid0IHRoaW5rIHRoZSBmdW5jdGlvbiBvZiBkZWZhdWx0X2FjY2VzcyBmb3Ig YW4gYWx0cDJtIHdhcwpzZXR0bGVkLCBzbyBib3RoIG9mIHRoZXNlIHdvdWxkIHNvdW5kIHRvIG1l IGxpa2UgYSB2YWxpZCBzZXR1cC4gSQpwZXJzb25hbGx5IHdvdWxkIHByZWZlciB0aGF0IGlmIHRo ZSBkZWZhdWx0X2FjY2VzcyBpcyBzcGVjaWZpZWQgYW5kCml0J3Mgbm90IHJ3eCBpdCB3b3VsZCBy ZXN1bHQgaW4gdGhlIGVudGlyZSBhbHRwMm0gdmlldyBnZXR0aW5nCnBvcHVsYXRlZCByaWdodCB0 aGVyZSBpbnN0ZWFkIG9mIGl0IGJlaW5nIGRvbmUgbGF6aWx5LiBUaGUgd2hvbGUKbGF6eS1wb3B1 bGF0aW9uIG9mIHRoZSBhbHRwMm0gdmlld3MgaGFzIGJlZW4gbm90aGluZyBidXQgYSBoZWFkYWNo ZS4KQWRkIHRvIHRoYXQgdGhlIGZhY3QgdGhhdCB2aWV3cyBnZXQgY29tcGxldGVseSByZXNldCB1 bmRlciBjZXJ0YWluCnNpdHVhdGlvbnMgd2l0aG91dCBhbnkgaW5kaWNhdGlvbiBiZWluZyBnaXZl biB0byB0aGUgYXBwbGljYXRpb24gdXNpbmcKaXQuLiBtaWdodCBiZSB0aW1lIHdlIHJldGhpbmsg dGhlc2UgcGFydHMgb2YgYWx0cDJtIHRvIG1ha2UgaXQgbW9yZQpyb2J1c3QuCgpUYW1hcwoKX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1h aWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54 ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA==