From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tvrtko Ursulin Subject: Re: [PATCH v4 2/3] drm/i915: Fix userptr deadlock with aliased GTT mmappings Date: Thu, 10 Sep 2015 11:31:36 +0100 Message-ID: <55F15C08.9040708@linux.intel.com> References: <1441878715-24948-1-git-send-email-chris@chris-wilson.co.uk> <1441878715-24948-2-git-send-email-chris@chris-wilson.co.uk> <55F15A96.1080008@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTP id 6D9686E20F for ; Thu, 10 Sep 2015 03:31:38 -0700 (PDT) In-Reply-To: <55F15A96.1080008@linux.intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson , intel-gfx@lists.freedesktop.org Cc: stable@vger.kernel.org List-Id: intel-gfx@lists.freedesktop.org Ck9uIDA5LzEwLzIwMTUgMTE6MjUgQU0sIFR2cnRrbyBVcnN1bGluIHdyb3RlOgo+PiArCj4+ICsg ICAgYWN0aXZlID0gZmFsc2U7Cj4+ICsgICAgaWYgKHBpbm5lZCA8IDApCj4+ICsgICAgICAgIHJl dCA9IHBpbm5lZDsKPj4gKyAgICBlbHNlIGlmIChwaW5uZWQgPCBudW1fcGFnZXMpCj4+ICsgICAg ICAgIHJldCA9IF9faTkxNV9nZW1fdXNlcnB0cl9nZXRfcGFnZXNfc2NoZWR1bGUob2JqLCAmYWN0 aXZlKTsKPj4gKyAgICBlbHNlCj4+ICAgICAgICAgICByZXQgPSBfX2k5MTVfZ2VtX3VzZXJwdHJf c2V0X3BhZ2VzKG9iaiwgcHZlYywgbnVtX3BhZ2VzKTsKPj4gLSAgICAgICAgaWYgKHJldCA9PSAw KSB7Cj4+IC0gICAgICAgICAgICBvYmotPnVzZXJwdHIud29yayA9IE5VTEw7Cj4+IC0gICAgICAg ICAgICBwaW5uZWQgPSAwOwo+PiAtICAgICAgICB9Cj4+ICsgICAgaWYgKHJldCkgewo+PiArICAg ICAgICBfX2k5MTVfZ2VtX3VzZXJwdHJfc2V0X2FjdGl2ZShvYmosIGFjdGl2ZSk7Cj4+ICsgICAg ICAgIHJlbGVhc2VfcGFnZXMocHZlYywgcGlubmVkLCAwKTsKPgo+IEkgdGhpbmsgaXQgd291bGQg YmUgc2FmZXIgdG8gc2V0IHBpbm5lZCB0byB6ZXJvIGluIHRoZSBwaW5uZWQgPCAwIGNhc2UsCj4g cmF0aGVyIHRoYW4gcmVseSBvbiByZWxlYXNlX3BhZ2VzIGltcGxlbWVudGF0aW9uIGtub3dsZWRn ZS4gT3RoZXJ3aXNlIGl0Cj4gaXMgdG9vIGZyYWdpbGUuCj4KPiBJZiB5b3UgY2FuIHB1dCB0aGF0 IGJhY2sgeW91IGNhbiBwdXQgbXkgUi1CIG9uIHRoZSBwYXRjaC4KCk9yIHBvc3NpYmx5IGV2ZW4g YmV0dGVyOgoKaWYgKHBpbm5lZCA+PSAwKQoJcmVsZWFzZV9wYWdlcyguLi4pOwoKPwoKVHZydGtv CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1n ZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cDovL2xp c3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=