From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Gordon Subject: Re: [PATCH 03/15] drm/i915: Only spin whilst waiting on the current request Date: Tue, 1 Dec 2015 16:44:53 +0000 Message-ID: <565DCE85.5010303@intel.com> References: <1448786893-2522-1-git-send-email-chris@chris-wilson.co.uk> <1448786893-2522-4-git-send-email-chris@chris-wilson.co.uk> <565C1F92.2010501@linux.intel.com> <565DC116.7050402@intel.com> <20151201155827.GE26256@nuc-i3427.alporthouse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTP id E2D496E8A0 for ; Tue, 1 Dec 2015 08:45:18 -0800 (PST) In-Reply-To: <20151201155827.GE26256@nuc-i3427.alporthouse.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 , Tvrtko Ursulin , intel-gfx@lists.freedesktop.org, Daniel Vetter , Eero Tamminen , stable@kernel.vger.org, "Rantala, Valtteri" List-Id: intel-gfx@lists.freedesktop.org T24gMDEvMTIvMTUgMTU6NTgsIENocmlzIFdpbHNvbiB3cm90ZToKPiBPbiBUdWUsIERlYyAwMSwg MjAxNSBhdCAwMzo0NzozNFBNICswMDAwLCBEYXZlIEdvcmRvbiB3cm90ZToKPj4gT24gMzAvMTEv MTUgMTA6MDYsIFR2cnRrbyBVcnN1bGluIHdyb3RlOgo+Pj4KPj4+IE9uIDI5LzExLzE1IDA4OjQ4 LCBDaHJpcyBXaWxzb24gd3JvdGU6Cj4+Pj4gTGltaXQgYnVzeXdhaXRpbmcgb25seSB0byB0aGUg cmVxdWVzdCBjdXJyZW50bHkgYmVpbmcgcHJvY2Vzc2VkIGJ5IHRoZQo+Pj4+IEdQVS4gSWYgdGhl IHJlcXVlc3QgaXMgbm90IGN1cnJlbnRseSBiZWluZyBwcm9jZXNzZWQgYnkgdGhlIEdQVSwgdGhl cmUKPj4+PiBpcyBhIHZlcnkgbG93IGxpa2VsaWhvb2Qgb2YgaXQgYmVpbmcgY29tcGxldGVkIHdp dGhpbiB0aGUgMiBtaWNyb3NlY29uZAo+Pj4+IHNwaW4gdGltZW91dCBhbmQgc28gd2Ugd2lsbCBq dXN0IGJlIHdhc3RpbmcgQ1BVIGN5Y2xlcy4KPj4+Pgo+Pj4+IHYyOiBDaGVjayBmb3IgbG9naWNh bCBpbnZlcnNpb24gd2hlbiByZWJhc2luZyAtIHdlIHdlcmUgaW5jb3JyZWN0bHkKPj4+PiBjaGVj a2luZyBmb3IgdGhpcyByZXF1ZXN0IGJlaW5nIGFjdGl2ZSwgYW5kIGluc3RlYWQgYnVzeXdhaXRp bmcgZm9yCj4+Pj4gd2hlbiB0aGUgR1BVIHdhcyBub3QgeWV0IHByb2Nlc3NpbmcgdGhlIHJlcXVl c3Qgb2YgaW50ZXJlc3QuCj4+Pj4KPj4+PiB2MzogVHJ5IGFub3RoZXIgY29sb3VyIGZvciB0aGUg c2Vxbm8gbmFtZXMuCj4+Pj4gdjQ6IEFub3RoZXIgY29sb3VyIGZvciB0aGUgZnVuY3Rpb24gbmFt ZXMuCj4+Cj4+IEFkZGluZyBhIGZpZWxkIGluIHRoZSByZXF1ZXN0IHRvIHRyYWNrIHRoZSBzZXF1 ZW5jZSBudW1iZXIgb2YgdGhlCj4+IHByZXZpb3VzIHJlcXVlc3QgaXNuJ3QgaWRlYWwgd2hlbiBj b25zaWRlcmluZyB0aGUgc2NoZWR1bGVyIGFuZAo+PiBwcmVlbXB0aW9uLiBCdXQgd2UndmUgZ290 IGEgc2VwYXJhdGUgYmF0Y2gtaW4tcHJvZ3Jlc3Mgc2VxdWVuY2UKPj4gbnVtYmVyIGluIHRoZSBo YXJkd2FyZSBzdGF0dXMgcGFnZSAoYWxzbyBmb3IgdXNlIGJ5IFREUiB0byBjaGVjawo+PiB3aGlj aCBiYXRjaCBpcyBjdXJyZW50bHkgcnVubmluZyksIHNvIHlvdSBjb3VsZCB1c2UgdGhhdC4gVGhl biB0aGUKPj4gY2hlY2sgaXMgc2ltcGx5Cj4KPiBBcyBkZW1vbnN0cmF0ZWQgVERSIGRvZXNuJ3Qg bmVlZCBpdCwgYW5kIHRoZSBHUFUgc2NoZWR1bGVyIGhhcyB0byBmaXggdXAKPiB0aGUgc2Vxbm8g YW55d2F5IHRvIG1haW50YWluIHJldGlyZW1lbnQgb3JkZXIgb2YgdGhlIHJlcXVlc3QgbGlzdC4K PiAtQ2hyaXMKCklmIHRoZSByZXF1ZXN0IGxpc3QgaXMgaW4gcmV0aXJlbWVudCBvcmRlciwgdGhl biB0aGUgcHJldmlvdXMtc2Vxbm8gb2YgYSAKcmVxdWVzdCBpcyBzaW1wbHkgdGhlIHNlcW5vIG9m IHRoZSBwcmV2aW91cyByZXF1ZXN0IGluIHRoZSByZXF1ZXN0IGxpc3QuIApJZiB0aGVyZSBpc24n dCBhIHByZXZpb3VzIHJlcXVlc3QsIHRoZW4gdGhlIHJlcXVlc3QgdW5kZXIgY29uc2lkZXJhdGlv biAKaXMgYXQgdGhlIGhlYWQgb2YgdGhlIGxpc3QgYW5kIG11c3QgYmUgdGhlIGN1cnJlbnRseS1h Y3RpdmUgcmVxdWVzdCAKYW55d2F5IChvZiBjb3Vyc2UsIHRoZSBjb252ZXJzZSBkb2VzIG5vdCBo b2xkLCBkdWUgdG8gbGF6eSByZXRpcmVtZW50IAphbmQgc3VjaCkuCgpUaGUgc2NoZWR1bGVyIHdp bGwgcmVhc3NpZ24gc2Vxbm9zIGFzIGJhdGNoZXMgYXJlIHN1Ym1pdHRlZCB0byB0aGUgCmJhY2tl bmQgc3VibWlzc2lvbiBtZWNoYW5pc20gKHJpbmdidWZmZXIsIGV4ZWNsaXN0LCBvciBHdUMpLCBz byB0aGV5IAp3aWxsIHN0YXJ0IG91dCBpbiBvcmRlci4gQnV0IHRoYXQgZG9lc24ndCBndWFyYW50 ZWUgaW4tb3JkZXIgY29tcGxldGlvbiAKb25jZSB3ZSBhZGQgcHJlZW1wdGlvbiwgc28gd2Ugd2ls bCBpbiBhbnkgY2FzZSBiZSB0cmFja2luZyBib3RoIHRoZSAKc3RhcnQgYW5kIGZpbmlzaCBvZiBl YWNoIGJhdGNoLgoKVGhlIChBbmRyb2lkKSBURFIgcHJldmlvdXNseSB3b3JrZWQgb24gYnkgVG9t YXMgRWxmIGRpZCBtYWtlIHVzZSBvZiB0aGUgCmJhdGNoLXN0YXJ0ZWQgc2Vxbm87IGF0IGxlYXN0 IHNvbWUgb2YgdGhlIGVuaGFuY2VtZW50cyBpbiB0aGF0IHZlcnNpb24gCm9mIFREUiBhcmUgZXhw ZWN0ZWQgdG8gYmUgcG9ydGVkIGludG8gdGhlIHVwc3RyZWFtIExpbnV4IHNvb24uCgpCVFcgSSB3 b3VsZCBmaW5kIGl0IGVhc2llciB0byB0ZXN0ICYgcmV2aWV3IHRoZXNlIHBhdGNoZXMgaWYgdGhl eSB3ZXJlIAppbiBhIGRpZmZlcmVudCBvcmRlciwgc3BlY2lmaWNhbGx5IEknZCBwcmVmZXIgdG8g c2VlIHRoZSBpbmZyYXN0cnVjdHVyZSAKdXBkYXRlcyAocGF0Y2hlcyA5LTEyOiBsYXp5IGNvaGVy ZW5jeSwgZ2V0IHJpZCBvZiBnZXRfc2Vxbm8oKSwgZXRjKSAKYmVmb3JlIHRoZSBmZWF0dXJlcyB0 aGF0IHRoZXkgaGVscCBzaW1wbGlmeSAoc3Bpbi13YWl0IG9wdGltaXNhdGlvbiwgCnRodW5kZXJp bmcgaGVyZCBzdXBwcmVzc2lvbiwgZXRjKS4KCi5EYXZlLgpfX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdm eEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cDovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWls bWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=