From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: Re: [PATCH 11/11] dma-buf: Do a fast lockless check for poll with timeout=0 Date: Sun, 25 Sep 2016 22:44:34 +0200 Message-ID: <20160925204434.GQ20761@phenom.ffwll.local> References: <20160829070834.22296-1-chris@chris-wilson.co.uk> <20160829070834.22296-11-chris@chris-wilson.co.uk> <20160923135044.GM3988@dvetter-linux.ger.corp.intel.com> <20160923152044.GG28107@nuc-i3427.alporthouse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-wm0-x241.google.com (mail-wm0-x241.google.com [IPv6:2a00:1450:400c:c09::241]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8F2536E26C for ; Sun, 25 Sep 2016 20:44:38 +0000 (UTC) Received: by mail-wm0-x241.google.com with SMTP id b184so11234620wma.3 for ; Sun, 25 Sep 2016 13:44:38 -0700 (PDT) Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Christian =?iso-8859-1?Q?K=F6nig?= Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, Sumit Semwal , linux-media@vger.kernel.org List-Id: intel-gfx@lists.freedesktop.org T24gRnJpLCBTZXAgMjMsIDIwMTYgYXQgMDc6NTk6NDRQTSArMDIwMCwgQ2hyaXN0aWFuIEvDtm5p ZyB3cm90ZToKPiBBbSAyMy4wOS4yMDE2IHVtIDE3OjIwIHNjaHJpZWIgQ2hyaXMgV2lsc29uOgo+ ID4gT24gRnJpLCBTZXAgMjMsIDIwMTYgYXQgMDM6NTA6NDRQTSArMDIwMCwgRGFuaWVsIFZldHRl ciB3cm90ZToKPiA+ID4gT24gTW9uLCBBdWcgMjksIDIwMTYgYXQgMDg6MDg6MzRBTSArMDEwMCwg Q2hyaXMgV2lsc29uIHdyb3RlOgo+ID4gPiA+IEN1cnJlbnRseSB3ZSBpbnN0YWxsIGEgY2FsbGJh Y2sgZm9yIHBlcmZvcm1pbmcgcG9sbCBvbiBhIGRtYS1idWYsCj4gPiA+ID4gaXJyZXNwZWN0aXZl IG9mIHRoZSB0aW1lb3V0LiBUaGlzIGludm9sdmVzIHRha2luZyBhIHNwaW5sb2NrLCBhcyB3ZWxs IGFzCj4gPiA+ID4gdW5uZWNlc3Nhcnkgd29yaywgYW5kIGdyZWF0bHkgcmVkdWNlcyBzY2FsaW5n IG9mIHBvbGwoLnRpbWVvdXQ9MCkgYWNyb3NzCj4gPiA+ID4gbXVsdGlwbGUgdGhyZWFkcy4KPiA+ ID4gPiAKPiA+ID4gPiBXZSBjYW4gcXVlcnkgd2hldGhlciB0aGUgcG9sbCB3aWxsIGJsb2NrIHBy aW9yIHRvIGluc3RhbGxpbmcgdGhlCj4gPiA+ID4gY2FsbGJhY2sgdG8gbWFrZSB0aGUgYnVzeS1x dWVyeSBmYXN0Lgo+ID4gPiA+IAo+ID4gPiA+IFNpbmdsZSB0aHJlYWQ6IDYwJSBmYXN0ZXIKPiA+ ID4gPiA4IHRocmVhZHMgb24gNCAoKzQgSFQpIGNvcmVzOiA2MDAlIGZhc3Rlcgo+ID4gPiA+IAo+ ID4gPiA+IFN0aWxsIG5vdCBxdWl0ZSB0aGUgcGVyZmVjdCBzY2FsaW5nIHdlIGdldCB3aXRoIGEg bmF0aXZlIGJ1c3kgaW9jdGwsIGJ1dAo+ID4gPiA+IHBvbGwoZG1hYnVmKSBpcyBmYXN0ZXIgZHVl IHRvIHRoZSBxdWlja2VyIGxvb2t1cCBvZiB0aGUgb2JqZWN0IGFuZAo+ID4gPiA+IGF2b2lkaW5n IGRybV9pb2N0bCgpLgo+ID4gPiA+IAo+ID4gPiA+IFNpZ25lZC1vZmYtYnk6IENocmlzIFdpbHNv biA8Y2hyaXNAY2hyaXMtd2lsc29uLmNvLnVrPgo+ID4gPiA+IENjOiBTdW1pdCBTZW13YWwgPHN1 bWl0LnNlbXdhbEBsaW5hcm8ub3JnPgo+ID4gPiA+IENjOiBsaW51eC1tZWRpYUB2Z2VyLmtlcm5l bC5vcmcKPiA+ID4gPiBDYzogZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwo+ID4gPiA+ IENjOiBsaW5hcm8tbW0tc2lnQGxpc3RzLmxpbmFyby5vcmcKPiA+ID4gPiBSZXZpZXdlZC1ieTog RGFuaWVsIFZldHRlciA8ZGFuaWVsLnZldHRlckBmZndsbC5jaD4KPiA+ID4gTmVlZCB0byBzdHJp a2UgdGhlIHItYiBoZXJlLCBzaW5jZSBDaHJpc3RpYW4gS8O2bmlnIHBvaW50ZWQgb3V0IHRoYXQK PiA+ID4gb2JqZWN0cyB3b24ndCBtYWdpY2FsbHkgc3dpdGNoIHNpZ25hbGxpbmcgb24uCj4gPiBP aCwgaXQgYWxzbyBtZWFucyB0aGF0Cj4gPiAKPiA+IGNvbW1pdCBmYjhiN2QyYjlkODBlMWU3MWYz NzllNTczNTU5MzZiZDJiMDI0YmU5Cj4gPiBBdXRob3I6IEphbW15IFpob3UgPEphbW15Llpob3VA YW1kLmNvbT4KPiA+IERhdGU6ICAgV2VkIEphbiAyMSAxODozNTo0NyAyMDE1ICswODAwCj4gPiAK PiA+ICAgICAgcmVzZXJ2YXRpb246IHdhaXQgb25seSB3aXRoIG5vbi16ZXJvIHRpbWVvdXQgc3Bl Y2lmaWVkICh2MykKPiA+ICAgICAgV2hlbiB0aGUgdGltZW91dCB2YWx1ZSBwYXNzZWQgdG8gcmVz ZXJ2YXRpb25fb2JqZWN0X3dhaXRfdGltZW91dF9yY3UKPiA+ICAgICAgaXMgemVybywgbm8gd2Fp dCBzaG91bGQgYmUgZG9uZSBpZiB0aGUgZmVuY2VzIGFyZSBub3Qgc2lnbmFsZWQuCj4gPiAgICAg IFJldHVybiAnMScgZm9yIGlkbGUgYW5kICcwJyBmb3IgYnVzeSBpZiB0aGUgc3BlY2lmaWVkIHRp bWVvdXQgaXMgJzAnCj4gPiAgICAgIHRvIGtlZXAgY29uc2lzdGVudCB3aXRoIHRoZSBjYXNlIG9m IG5vbi16ZXJvIHRpbWVvdXQuCj4gPiAgICAgIHYyOiBjYWxsIGZlbmNlX3B1dCBpZiBub3Qgc2ln bmFsZWQgaW4gdGhlIGNhc2Ugb2YgdGltZW91dD09MAo+ID4gICAgICB2Mzogc3dpdGNoIHRvIHJl c2VydmF0aW9uX29iamVjdF90ZXN0X3NpZ25hbGVkX3JjdQo+ID4gICAgICBTaWduZWQtb2ZmLWJ5 OiBKYW1teSBaaG91IDxKYW1teS5aaG91QGFtZC5jb20+Cj4gPiAgICAgIFJldmlld2VkLWJ5OiBD aHJpc3RpYW4gS8O2bmlnIDxjaHJpc3RpYW4ua29lbmlnQGFtZC5jb20+Cj4gPiAgICAgIFJldmll d2VkLWJ5OiBBbGV4IERldWNoZXIgPGFsZXhhbmRlci5kZXVjaGVyQGFtZC5jb20+Cj4gPiAgICAg IFJldmlld2VkLUJ5OiBNYWFydGVuIExhbmtob3JzdCA8bWFhcnRlbi5sYW5raG9yc3RAY2Fub25p Y2FsLmNvbT4KPiA+ICAgICAgU2lnbmVkLW9mZi1ieTogU3VtaXQgU2Vtd2FsIDxzdW1pdC5zZW13 YWxAbGluYXJvLm9yZz4KPiA+IAo+ID4gaXMgd3JvbmcuIEFuZCByZXNlcnZhdGlvbl9vYmplY3Rf dGVzdF9zaWduYWxlZF9yY3UoKSBpcyB1bnJlbGlhYmxlLgo+IAo+IFVwcyBpbmRlZWQsIHRoYXQg cGF0Y2ggaXMgd3JvbmcgYXMgd2VsbC4KPiAKPiBJIHN1Z2dlc3QgdGhhdCB3ZSBqdXN0IGVuYWJs ZSB0aGUgc2lnbmFsaW5nIGluIHRoaXMgY2FzZSBhcyB3ZWxsLgoKV2lsbCB5b3UvWmhvdSB0YWtl IGNhcmUgb2YgdGhpcyBjb3JuZXIgY2FzZT8gSnVzdCBzbyBJIGNhbid0IGZvcmdldCBhYm91dApp dCA7LSkKClRoYW5rcywgRGFuaWVsCi0tIApEYW5pZWwgVmV0dGVyClNvZnR3YXJlIEVuZ2luZWVy LCBJbnRlbCBDb3Jwb3JhdGlvbgpodHRwOi8vYmxvZy5mZndsbC5jaApfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0Cklu dGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5v cmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK