From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH v2] x86/mm: Suppresses vm_events caused by page-walks Date: Thu, 13 Sep 2018 08:17:00 -0600 Message-ID: <5B9A715C02000078001E84B6@prv1-mh.provo.novell.com> References: <20180912094701.2205-1-aisaila@bitdefender.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20180912094701.2205-1-aisaila@bitdefender.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: aisaila@bitdefender.com Cc: Tamas K Lengyel , Wei Liu , Razvan Cojocaru , George Dunlap , Andrew Cooper , Tim Deegan , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDEyLjA5LjE4IGF0IDExOjQ3LCA8YWlzYWlsYUBiaXRkZWZlbmRlci5jb20+IHdyb3Rl Ogo+IFRoZSBvcmlnaW5hbCB2ZXJzaW9uIG9mIHRoZSBwYXRjaCBlbXVsYXRlZCB0aGUgY3VycmVu dCBpbnN0cnVjdGlvbgo+ICh3aGljaCwgYXMgYSBzaWRlLWVmZmVjdCwgZW11bGF0ZWQgdGhlIHBh Z2Utd2FsayBhcyB3ZWxsKSwgaG93ZXZlciB3ZQo+IG5lZWQgZmluZXItZ3JhaW5lZCBjb250cm9s LiBXZSB3YW50IHRvIGVtdWxhdGUgdGhlIHBhZ2Utd2FsaywgYnV0IHN0aWxsCj4gZ2V0IGFuIEVQ VCB2aW9sYXRpb24gZXZlbnQgaWYgdGhlIGN1cnJlbnQgaW5zdHJ1Y3Rpb24gd291bGQgdHJpZ2dl ciBvbmUuCj4gVGhpcyBwYXRjaCBwZXJmb3JtcyBqdXN0IHRoZSBwYWdlLXdhbGsgZW11bGF0aW9u LgoKUmF0aGVyIHRoYW4gbWFraW5nIHRoaXMgYmFzaWNhbGx5IGEgcmV2aXNpb24gbG9nLCBjb3Vs ZCB5b3UgcGxlYXNlIGZvY3VzCm9uIHdoYXQgeW91IGFjdHVhbGx5IHdhbnQgdG8gYWNoaWV2ZT8K CkFzIHRvIHRoZSB0aXRsZTogIlN1cHByZXNzIC4uLiIgcGxlYXNlLgoKPiBAQCAtMTQ5LDYgKzE1 MSwxMCBAQCBndWVzdF93YWxrX3RhYmxlcyhzdHJ1Y3QgdmNwdSAqdiwgc3RydWN0IHAybV9kb21h aW4gKnAybSwKPiAgICAgIGFyX2FuZCAmPSBnZmxhZ3M7Cj4gICAgICBhcl9vciAgfD0gZ2ZsYWdz Owo+ICAKPiArICAgIGlmICggc2V0X2FkICYmIHNldF9hZF9iaXRzKCZsNHBbZ3Vlc3RfbDRfdGFi bGVfb2Zmc2V0KHZhKV0ubDQsCj4gKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAmZ3ct Pmw0ZS5sNCwgZmFsc2UpICkKPiArICAgICAgICBhY2Nlc3NlZCA9IHRydWU7CgpJdCBpcyBpbiBw YXJ0aWN1bGFyIHRoaXMgc2VlbWluZ2x5IG9kZCAoYW5kIHJlZHVuZGFudCB3aXRoIHdoYXQncyBk b25lCmxhdGVyIGluIHRoZSBmdW5jdGlvbikgd2hpY2ggbmVlZHMgdGhvcm91Z2ggZXhwbGFuYXRp b24uCgo+IEBAIC0zNjIsNiArMzc2LDEzIEBAIGd1ZXN0X3dhbGtfdGFibGVzKHN0cnVjdCB2Y3B1 ICp2LCBzdHJ1Y3QgcDJtX2RvbWFpbiAqcDJtLAo+ICAgICAgICovCj4gICAgICBhciA9IChhcl9h bmQgJiBBUl9BQ0NVTV9BTkQpIHwgKGFyX29yICYgQVJfQUNDVU1fT1IpOwo+ICAKPiArICAgIGlm ICggc2V0X2FkICkKPiArICAgIHsKPiArICAgICAgICBzZXRfYWRfYml0cygmbDFwW2d1ZXN0X2wx X3RhYmxlX29mZnNldCh2YSldLmwxLCAmZ3ctPmwxZS5sMSwKPiArICAgICAgICAgICAgICAgICAg ICAoYXIgJiBfUEFHRV9SVykgJiYgIWFjY2Vzc2VkICYmICFndWVzdF93cF9lbmFibGVkKHYpKTsK PiArICAgICAgICBnb3RvIG91dDsKPiArICAgIH0KCldoeSBkb2VzIEEgYml0cyBiZWluZyBzZXQg KG9yIG5vdCkgaW4gbm9uLWxlYWYgKHBvc3NpYmx5LCBidXQgZXZlbiB0aGF0J3MKaW5jb25zaXN0 ZW50IGluIHlvdXIgaGFuZGxpbmcpIHRhYmxlcyBoYXZlIGFueSBtZWFuaW5nIGZvciB3aGV0aGVy IHRoZQpEIGJpdCB3YW50cyBzZXR0aW5nIGluIHRoZSBsZWFmIHBhZ2UgdGFibGU/IFNpbWlsYXJs eSwgd2h5IGRvZXMgaXQgbWF0dGVyCndoZXRoZXIgdGhlIGFjY3VtdWxhdGVkIHBlcm1pc3Npb25z IGFsbG93IHdyaXRpbmcsIGlycmVzcGVjdGl2ZSBvZgp3aGV0aGVyIHRoZSBvcGVyYXRpb24gd2Fz IGFjdHVhbGx5IGEgd3JpdGU/IFNhbWUgZm9yIENSMC5XUC4KCj4gLS0tIGEveGVuL2FyY2gveDg2 L21tL2hhcC9oYXAuYwo+ICsrKyBiL3hlbi9hcmNoL3g4Ni9tbS9oYXAvaGFwLmMKPiBAQCAtNzY4 LDcgKzc2OCw4IEBAIHN0YXRpYyBjb25zdCBzdHJ1Y3QgcGFnaW5nX21vZGUgaGFwX3BhZ2luZ19y ZWFsX21vZGUgPSB7Cj4gICAgICAudXBkYXRlX2NyMyAgICAgICAgICAgICA9IGhhcF91cGRhdGVf Y3IzLAo+ICAgICAgLnVwZGF0ZV9wYWdpbmdfbW9kZXMgICAgPSBoYXBfdXBkYXRlX3BhZ2luZ19t b2RlcywKPiAgICAgIC53cml0ZV9wMm1fZW50cnkgICAgICAgID0gaGFwX3dyaXRlX3AybV9lbnRy eSwKPiAtICAgIC5ndWVzdF9sZXZlbHMgICAgICAgICAgID0gMQo+ICsgICAgLmd1ZXN0X2xldmVs cyAgICAgICAgICAgPSAxLAo+ICsgICAgLnBhZ2Vfd2Fsa19zZXRfYWRfYml0cyAgPSBoYXBfcGFn ZV93YWxrX3NldF9hZF9iaXRzXzJfbGV2ZWxzCj4gIH07CgpIZXJlIGFuZCBlbHNld2hlcmUsIHBs ZWFzZSBhZGQgbmV3IGhvb2tzIG5leHQgdG8gb3RoZXIgaG9va3MsCm5vdCBhdCB0aGUgZW5kLgoK PiAtLS0gYS94ZW4vYXJjaC94ODYvbW0vbWVtX2FjY2Vzcy5jCj4gKysrIGIveGVuL2FyY2gveDg2 L21tL21lbV9hY2Nlc3MuYwo+IEBAIC0yMTQsNyArMjE0LDEwIEBAIGJvb2wgcDJtX21lbV9hY2Nl c3NfY2hlY2socGFkZHJfdCBncGEsIHVuc2lnbmVkIGxvbmcgZ2xhLAo+ICAgICAgICAgICBkLT5h cmNoLm1vbml0b3IuaW5ndWVzdF9wYWdlZmF1bHRfZGlzYWJsZWQgJiYKPiAgICAgICAgICAgbnBm ZWMua2luZCAhPSBucGZlY19raW5kX3dpdGhfZ2xhICkgLyogZG9uJ3Qgc2VuZCBhIG1lbV9ldmVu dCAqLwo+ICAgICAgewo+IC0gICAgICAgIGh2bV9lbXVsYXRlX29uZV92bV9ldmVudChFTVVMX0tJ TkRfTk9STUFMLCBUUkFQX2ludmFsaWRfb3AsIFg4Nl9FVkVOVF9OT19FQyk7Cj4gKyAgICAgICAg c3RydWN0IGh2bV9od19jcHUgY3R4dDsKPiArCj4gKyAgICAgICAgaHZtX2Z1bmNzLnNhdmVfY3B1 X2N0eHQodiwgJmN0eHQpOwoKUHJldHR5IGV4cGVuc2l2ZSBhbiBvcGVyYXRpb24gd2hlbiBhbGwg eW91J3JlIGFmdGVyIGlzCnYtPmFyY2guaHZtLmd1ZXN0X2NyWzNdLgoKSmFuCgoKCl9fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5n IGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJv amVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=