From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michel =?ISO-8859-1?Q?D=E4nzer?= Subject: Re: [RFC PATCH] drm: Fix off-by-one races on vblank disable Date: Thu, 17 Nov 2011 09:30:21 +0100 Message-ID: <1321518621.3794.83.camel@thor.local> References: <4dfde72a33598c136eb3e4866325c523700dcc46.1321507426.git.luto@mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail.gna.ch (darkcity.gna.ch [195.226.6.51]) by gabe.freedesktop.org (Postfix) with ESMTP id 3AF41A0E56 for ; Thu, 17 Nov 2011 00:30:36 -0800 (PST) In-Reply-To: <4dfde72a33598c136eb3e4866325c523700dcc46.1321507426.git.luto@mit.edu> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: Andy Lutomirski Cc: Matthew Garrett , dri-devel@lists.freedesktop.org, Mario Kleiner List-Id: dri-devel@lists.freedesktop.org WyBEcm9wcGluZyBpbnRlbC1nZnggbGlzdCBmcm9tIENDLCBhcyBpdCBhdXRvbWF0aWNhbGx5IHJl amVjdHMgcG9zdHMKZnJvbSBub24tc3Vic2NyaWJlcnMgXQoKT24gTWl0LCAyMDExLTExLTE2IGF0 IDIxOjM5IC0wODAwLCBBbmR5IEx1dG9taXJza2kgd3JvdGU6IAo+IFRoZXJlIGFyZSB0d28gcG9z c2libGUgcmFjZXMgd2hlbiBkaXNhYmxpbmcgdmJsYW5rcy4gIElmIHRoZSBJUlEKPiBmaXJlZCBi dXQgdGhlIGhhcmR3YXJlIGRpZG4ndCB1cGRhdGUgaXRzIGNvdW50ZXIgeWV0LCB0aGVuIHdlIHN0 b3JlCj4gdG9vIGxvdyBhIGhhcmR3YXJlIGNvdW50ZXIuICAoU2Vuc2libGUgaGFyZHdhcmUgbmV2 ZXIgZG9lcyB0aGlzLgo+IEFwcGFyZW50bHkgbm90IGFsbCBoYXJkd2FyZSBpcyBzZW5zaWJsZS4p CgpUaGUgdGhpbmcgaXMsICd0aGUnIElSUSBhbmQgJ3RoZScgaGFyZHdhcmUgY291bnRlciBhcmVu J3QgbmVjZXNzYXJpbHkKYWJvdXQgdGhlIHNhbWUgdGhpbmcuIFdlIHdhbnQgYW4gSVJRIHdoaWNo IHRyaWdnZXJzIGF0IHRoZSBiZWdpbm5pbmcgb2YKdmVydGljYWwgYmxhbmssIGJ1dCB0aGUgUmFk ZW9uIGhhcmR3YXJlIGNvdW50ZXJzIGluY3JlbWVudCBhdCB0aGUKYmVnaW5uaW5nIG9mIHNjYW5v dXQsIGkuZS4gYXQgdGhlIGVuZCBvZiB2ZXJ0aWNhbCBibGFuay4gRG9lcyB0aGF0IG1ha2UKdGhl IGhhcmR3YXJlICdicm9rZW4nIG9yICdub3Qgc2Vuc2libGUnPwoKPiBJZiwgb24gdGhlIG90aGVy IGhhbmQsIHRoZSBjb3VudGVyIHVwZGF0ZWQgYnV0IHRoZSBJUlEgZGlkbid0IGZpcmUKPiB5ZXQs IHdlIHN0b3JlIHRvbyBoaWdoIGEgY291bnRlci4gCj4gCj4gV2UgaGFuZGxlZCB0aGUgZm9ybWVy IGNhc2Ugd2l0aCBhIGhldXJpc3RpYyBiYXNlZCBvbiB0aW1lc3RhbXBzIGFuZAo+IHdlIGRpZCBu b3QgaGFuZGxlIHRoZSBsYXR0ZXIgY2FzZS4gIEJ5IHNhdmluZyBhIGxpdHRsZSBtb3JlIHN0YXRl LAo+IHdlIGNhbiBoYW5kbGUgYm90aCBjYXNlcyBleGFjdGx5OiBhbGwgd2UgbmVlZCB0byBkbyBp cyB3YXRjaCBmb3IKPiBjaGFuZ2VzIGluIHRoZSBkaWZmZXJlbmNlIGJldHdlZW4gdGhlIGhhcmR3 YXJlIGFuZCBzb2Z0d2FyZSB2YmxhbmsKPiBjb3VudHMuCgpJJ20gYWZyYWlkIHRoYXQgY2FuJ3Qg d29yazoKClNvbWUgKEFGQUlSIGFsc28gSW50ZWwpIGhhcmR3YXJlIHJlc2V0cyB0aGUgY291bnRl ciB0byAwIHdoZW4gdGhlIENSVEMKaXMgZGlzYWJsZWQgLyBlbmFibGVkIChlLmcuIGZvciBEUE1T LCBvciBhIG1vZGVzZXQpLiBUaGF0J3Mgd2h5IHdlIGVuZGVkCnVwIG9ubHkgY291bnRpbmcgaW50 ZXJydXB0cyB3aGlsZSB0aGUgSVJRIGlzIGVuYWJsZWQsIGFuZCBvbmx5IHVzaW5nIHRoZQpoYXJk d2FyZSBjb3VudGVyIHRvIGZpbGwgaW4gd2hpbGUgdGhlIElSUSBpcyBkaXNhYmxlZC4gVGhlIGhh cmR3YXJlCmNvdW50ZXIgY2Fubm90IGJlIGFzc3VtZWQgdG8gaGF2ZSBhbnkgZGVmaW5lZCBiZWhh dmlvdXIgYmV0d2VlbiBlbmFibGluZwphbmQgZGlzYWJsaW5nIHRoZSBJUlEuCgpUbyBjb21wZW5z YXRlIGZvciB0aGlzLCB0aGUgZHJpdmVycyBjYWxsIGRybV92YmxhbmtfcHJlX21vZGVzZXQgKHdo aWNoCmVuYWJsZXMgdGhlIElSUSwgd2hpY2ggYWxzbyB1cGRhdGVzIHRoZSB2aXJ0dWFsIGNvdW50 ZXIgZnJvbSB0aGUKaGFyZHdhcmUgY291bnRlcikgYmVmb3JlIGRpc2FibGluZyB0aGUgQ1JUQyBh bmQgZHJtX3ZibGFua19wb3N0X21vZGVzZXQKKHdoaWNoIGRpc2FibGVzIHRoZSBJUlEsIHdoaWNo IGFsc28gcmVjb3JkcyB0aGUgaGFyZHdhcmUgY291bnRlcikgYWZ0ZXIKZW5hYmxpbmcgdGhlIENS VEMuCgoKPiBUaGlzIGNvbXBpbGVzIGJ1dCBpcyBub3QgdmVyeSB3ZWxsIHRlc3RlZCwgYmVjYXVz ZSBJIGRvbid0IGtub3cgd2hhdAo+IHRlc3RzIHRvIHJ1bi4KCk5vdCBzdXJlIHRoZXJlIGFyZSBh bnkgZ29vZCB0ZXN0cyB5ZXQuIE1hcmlvLCB3b3VsZCBpdCBiZSBwb3NzaWJsZSB0bwpleHRyYWN0 IHNvbWV0aGluZyBleGVyY2lzaW5nIHRoZSB2YXJpb3VzIGNvcm5lciBjYXNlcyBmcm9tIHlvdXIg dG9vbGtpdD8KCgotLSAKRWFydGhsaW5nIE1pY2hlbCBEw6RuemVyICAgICAgICAgICB8ICAgICAg ICAgICAgICAgICAgIGh0dHA6Ly93d3cuYW1kLmNvbQpMaWJyZSBzb2Z0d2FyZSBlbnRodXNpYXN0 ICAgICAgICAgfCAgICAgICAgICBEZWJpYW4sIFggYW5kIERSSSBkZXZlbG9wZXIKX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVsIG1haWxpbmcg bGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVz a3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK