From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tvrtko Ursulin Subject: Re: [PATCH v2 2/3] drm/i915: Limit the busy wait on requests to 10us not 10ms! Date: Fri, 27 Nov 2015 16:52:58 +0000 Message-ID: <56588A6A.8060400@linux.intel.com> References: <1448634382-8987-1-git-send-email-chris@chris-wilson.co.uk> <1448634382-8987-2-git-send-email-chris@chris-wilson.co.uk> 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 0B0126E2D2 for ; Fri, 27 Nov 2015 08:53:21 -0800 (PST) In-Reply-To: <1448634382-8987-2-git-send-email-chris@chris-wilson.co.uk> 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: Daniel Vetter , Eero Tamminen , "Rantala, Valtteri" , stable@kernel.vger.org List-Id: intel-gfx@lists.freedesktop.org Ck9uIDI3LzExLzE1IDE0OjI2LCBDaHJpcyBXaWxzb24gd3JvdGU6Cj4gV2hlbiB3YWl0aW5nIGZv ciBoaWdoIGZyZXF1ZW5jeSByZXF1ZXN0cywgdGhlIGZpbml0ZSBhbW91bnQgb2YgdGltZQo+IHJl cXVpcmVkIHRvIHNldCB1cCB0aGUgaXJxIGFuZCB3YWl0IHVwb24gaXQgbGltaXRzIHRoZSByZXNw b25zZSByYXRlLiBCeQo+IGJ1c3l3YWl0aW5nIG9uIHRoZSByZXF1ZXN0IGNvbXBsZXRpb24gZm9y IGEgc2hvcnQgd2hpbGUgd2UgY2FuIHNlcnZpY2UKPiB0aGUgaGlnaCBmcmVxdWVuY3kgd2FpdHMg YXMgcXVpY2sgYXMgcG9zc2libGUuIEhvd2V2ZXIsIGlmIGl0IGlzIGEgc2xvdwo+IHJlcXVlc3Qs IHdlIHdhbnQgdG8gc2xlZXAgYXMgcXVpY2tseSBhcyBwb3NzaWJsZS4gVGhlIHRyYWRlb2ZmIGJl dHdlZW4KPiB3YWl0aW5nIGFuZCBzbGVlcGluZyBpcyByb3VnaGx5IHRoZSB0aW1lIGl0IHRha2Vz IHRvIHNsZWVwIG9uIGEgcmVxdWVzdCwKPiBvbiB0aGUgb3JkZXIgb2YgYSBtaWNyb3NlY29uZC4g QmFzZWQgb24gbWVhc3VyZW1lbnRzIG9mIHN5bmNocm9ub3VzCj4gd29ya2xvYWRzIGZyb20gYWNy b3NzIGJpZyBjb3JlIGFuZCBsaXR0bGUgYXRvbSwgSSBoYXZlIHNldCB0aGUgbGltaXQgZm9yCj4g YnVzeXdhaXRpbmcgYXMgMTAgbWljcm9zZWNvbmRzLiBJbiBtb3N0IG9mIHRoZSBzeW5jaHJvbm91 cyBjYXNlcywgd2UgY2FuCj4gcmVkdWNlIHRoZSBsaW1pdCBkb3duIHRvIGFzIGxpdHRsZSBhcyAy IG1pc2Nyb3NlY29uZHMsIGJ1dCB0aGF0IGxlYXZlcwo+IHF1aXRlIGEgZmV3IHRlc3QgY2FzZXMg cmVncmVzc2luZyBieSBmYWN0b3JzIG9mIDMgYW5kIG1vcmUuCj4KPiBUaGUgY29kZSBjdXJyZW50 bHkgdXNlcyB0aGUgamlmZmllIGNsb2NrLCBidXQgdGhhdCBpcyBmYXIgdG9vIGNvYXJzZSAob24K PiB0aGUgb3JkZXIgb2YgMTAgbWlsbGlzZWNvbmRzKSBhbmQgcmVzdWx0cyBpbiBwb29yIGludGVy YWN0aXZpdHkgYXMgdGhlCj4gQ1BVIGVuZHMgdXAgYmVpbmcgaG9nZ2VkIGJ5IHNsb3cgcmVxdWVz dHMuIFRvIGdldCBtaWNyb3NlY29uZCByZXNvbHV0aW9uCj4gd2UgbmVlZCB0byB1c2UgYSBoaWdo IHJlc29sdXRpb24gdGltZXIuIFRoZSBjaGVhcGVzdCBvZiB3aGljaCBpcyBwb2xsaW5nCj4gbG9j YWxfY2xvY2soKSwgYnV0IHRoYXQgaXMgb25seSB2YWxpZCBvbiB0aGUgc2FtZSBDUFUuIElmIHdl IHN3aXRjaCBDUFVzCj4gYmVjYXVzZSB0aGUgdGFzayB3YXMgcHJlZW1wdGVkLCB3ZSBjYW4gYWxz byB1c2UgdGhhdCBhcyBhbiBpbmRpY2F0b3IgdGhhdAo+ICAgdGhlIHN5c3RlbSBpcyB0b28gYnVz eSB0byB3YXN0ZSBjeWNsZXMgb24gc3Bpbm5pbmcgYW5kIHdlIHNob3VsZCBzbGVlcAo+IGluc3Rl YWQuCj4KPiBfX2k5MTVfc3Bpbl9yZXF1ZXN0IHdhcyBpbnRyb2R1Y2VkIGluCj4gY29tbWl0IDJk ZWY0YWQ5OWJlZmEyNTc3NWRkMmY3MTRmZGQ0ZDkyZmFlYzZlMzQgW3Y0LjJdCj4gQXV0aG9yOiBD aHJpcyBXaWxzb24gPGNocmlzQGNocmlzLXdpbHNvbi5jby51az4KPiBEYXRlOiAgIFR1ZSBBcHIg NyAxNjoyMDo0MSAyMDE1ICswMTAwCj4KPiAgICAgICBkcm0vaTkxNTogT3B0aW1pc3RpY2FsbHkg c3BpbiBmb3IgdGhlIHJlcXVlc3QgY29tcGxldGlvbgo+Cj4gdjI6IERyb3AgZnVsbCB1NjQgZm9y IHVuc2lnbmVkIGxvbmcgLSB0aGUgdGltZXIgaXMgMzJiaXQgd3JhcGFyb3VuZCBzYWZlLAo+IHNv IHdlIGNhbiB1c2UgbmF0aXZlIHJlZ2lzdGVyIHNpemVzIG9uIHNtYWxsZXIgYXJjaGl0ZWN0dXJl cy4gTWVudGlvbgo+IHRoZSBhcHByb3hpbWF0ZSBtaWNyb3NlY29uZHMgdW5pdHMgZm9yIGVsYXBz ZWQgdGltZSBhbmQgYWRkIHNvbWUgZXh0cmEKPiBjb21tZW50cyBkZXNjcmliaW5nIHRoZSByZWFz b24gZm9yIGJ1c3l3YWl0aW5nLgo+Cj4gdjM6IFJhaXNlIHRoZSBsaW1pdCB0byAxMHVzCgpSZXZp ZXdlZC1ieTogVHZydGtvIFVyc3VsaW4gPHR2cnRrby51cnN1bGluQGludGVsLmNvbT4KClJlZ2Fy ZHMsCgpUdnJ0a28KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3Jn Cmh0dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK