From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tvrtko Ursulin Subject: Re: [PATCH] drm/i915: Use exponential backoff for wait_for() Date: Tue, 21 Nov 2017 17:00:00 +0000 Message-ID: <5459c8a4-a7f5-fcaf-e588-72689aa9c213@linux.intel.com> References: <20171121152454.417-1-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 mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id D8D1E6E1DA for ; Tue, 21 Nov 2017 17:00:05 +0000 (UTC) In-Reply-To: <20171121152454.417-1-chris@chris-wilson.co.uk> Content-Language: en-GB 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 List-Id: intel-gfx@lists.freedesktop.org Ck9uIDIxLzExLzIwMTcgMTU6MjQsIENocmlzIFdpbHNvbiB3cm90ZToKPiBJbnN0ZWFkIG9mIHNs ZWVwaW5nIGZvciBhIGZpeGVkIDFtcyAocm91Z2hseSwgZGVwZW5kaW5nIG9uIHRpbWVyIHNsYWNr KSwKPiBzdGFydCB3aXRoIGEgc21hbGwgc2xlZXAgYW5kIGV4cG9uZW50aWFsbHkgaW5jcmVhc2Ug dGhlIHNsZWVwIG9uIGVhY2gKPiBjeWNsZS4KPiAKPiBBIGdvb2QgZXhhbXBsZSBvZiBhIGJlbmVm aWNpYXJ5IGlzIHRoZSBndWMgbW1pbyBjb21tdW5pY2F0aW9uIGNoYW5uZWwuCj4gVHlwaWNhbGx5 IHdlIGV4cGVjdCAoYW5kIHNvIHNwaW4pIGZvciAxMHVzIGZvciBhIHF1aWNrIHJlc3BvbnNlLCBi dXQgdGhpcwo+IGRvZXNuJ3QgY292ZXIgZXZlcnl0aGluZyBhbmQgc28gc29tZXRpbWVzIHdlIGZh bGxiYWNrIHRvIHRoZSBtaWxsaXNlY29uZCsKPiBzbGVlcC4gVGhpcyBpbmN1cnMgYSBzaWduaWZp Y2FudCBkZWxheSBpbiB0aW1lLWNyaXRpY2FsIG9wZXJhdGlvbnMgbGlrZQo+IHByZWVtcHRpb24g KGlndC9nZW1fZXhlY19sYXRlbmN5KSwgd2hpY2ggY2FuIGJlIGltcHJvdmVkIHNpZ25pZmljYW50 bHkgYnkKPiB1c2luZyBhIHNtYWxsIHNsZWVwIGFmdGVyIHRoZSBzcGluIGZhaWxzLgo+IAo+IFdl J3ZlIG1hZGUgdGhpcyBzdWdnZXN0aW9uIG1hbnkgdGltZXMsIGJ1dCBoYWQgbGl0dGxlIGV4cGVy aW1lbnRhbCBkYXRhCj4gdG8gc3VwcG9ydCBhZGRpbmcgdGhlIGNvbXBsZXhpdHkuCj4gCj4gUmVm ZXJlbmNlczogMTc1OGI5MGUzOGY1ICgiZHJtL2k5MTU6IFVzZSBhIGh5YnJpZCBzY2hlbWUgZm9y IGZhc3QgcmVnaXN0ZXIgd2FpdHMiKQo+IFNpZ25lZC1vZmYtYnk6IENocmlzIFdpbHNvbiA8Y2hy aXNAY2hyaXMtd2lsc29uLmNvLnVrPgo+IENjOiBUdnJ0a28gVXJzdWxpbiA8dHZydGtvLnVyc3Vs aW5AaW50ZWwuY29tPgo+IENjOiBKb2huIEhhcnJpc29uIDxKb2huLkMuSGFycmlzb25AaW50ZWwu Y29tPgo+IENjOiBNaWNoYcWCIFdpbmlhcnNraSA8bWljaGFsLndpbmlhcnNraUBpbnRlbC5jb20+ Cj4gQ2M6IFZpbGxlIFN5cmphbGEgPHZpbGxlLnN5cmphbGFAbGludXguaW50ZWwuY29tPgo+IC0t LQo+ICAgZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHJ2LmggfCA1ICsrKystCj4gICAxIGZp bGUgY2hhbmdlZCwgNCBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4gCj4gZGlmZiAtLWdp dCBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2Rydi5oIGIvZHJpdmVycy9ncHUvZHJtL2k5 MTUvaW50ZWxfZHJ2LmgKPiBpbmRleCA2OWFhYjMyNGFhYTEuLmMxZWE5YTAwOWViNCAxMDA2NDQK PiAtLS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9kcnYuaAo+ICsrKyBiL2RyaXZlcnMv Z3B1L2RybS9pOTE1L2ludGVsX2Rydi5oCj4gQEAgLTUwLDYgKzUwLDcgQEAKPiAgICAqLwo+ICAg I2RlZmluZSBfd2FpdF9mb3IoQ09ORCwgVVMsIFcpICh7IFwKPiAgIAl1bnNpZ25lZCBsb25nIHRp bWVvdXRfXyA9IGppZmZpZXMgKyB1c2Vjc190b19qaWZmaWVzKFVTKSArIDE7CVwKPiArCWxvbmcg d2FpdF9fID0gMTsJCQkJCQlcCj4gICAJaW50IHJldF9fOwkJCQkJCQlcCj4gICAJbWlnaHRfc2xl ZXAoKTsJCQkJCQkJXAo+ICAgCWZvciAoOzspIHsJCQkJCQkJXAo+IEBAIC02Miw3ICs2Myw5IEBA Cj4gICAJCQlyZXRfXyA9IC1FVElNRURPVVQ7CQkJCVwKPiAgIAkJCWJyZWFrOwkJCQkJCVwKPiAg IAkJfQkJCQkJCQlcCj4gLQkJdXNsZWVwX3JhbmdlKChXKSwgKFcpICogMik7CQkJCVwKPiArCQl1 c2xlZXBfcmFuZ2Uod2FpdF9fLCB3YWl0X18gKiAyKTsJCQlcCj4gKwkJaWYgKHdhaXRfXyA8IChX KSkJCQkJCVwKPiArCQkJd2FpdF9fIDw8PSAxOwkJCQkJXAo+ICAgCX0JCQkJCQkJCVwKPiAgIAly ZXRfXzsJCQkJCQkJCVwKPiAgIH0pCj4gCgpJIHdvdWxkIHN0YXJ0IHRoZSBwZXJpb2QgYXQgMTB1 cyBzaW5jZSBhKSA8MTB1cyBpcyBub3QgcmVjb21tZW5kZWQgZm9yIAp1c2xlZXAgZmFtaWx5LCBi KSBtb3N0IGNhbGxlcnMgc3BlY2lmeSBtcyB0aW1lb3V0cyBzbyA8MTB1cyBwb2xsIGlzIApwZXJo YXBzIGFuIG92ZXJraWxsLgoKTGF0ZW5jeSBzZW5zaXRpdmUgY2FsbGVycyBsaWtlIF9faW50ZWxf d2FpdF9mb3JfcmVnaXN0ZXJfdXMgY2FuIGJlIAp0d2Vha2VkIGF0IHRoZSBjYWxsIHNpdGUgdG8g cHJvdmlkZSB3aGF0IHRoZXkgd2FudC4KCkZvciB0aGUgYWN0dWFsIGd1YyBtbWlvIHNlbmQgaXQg c291bmRzIGxpa2UgaXQgc2hvdWxkIHBhc3MgaW4gMjB1cyB0byAKX19pbnRlbF93YWl0X2Zvcl9y ZWdpc3Rlcl91cyAocmVmZXJyaW5nIHRvIEpvaG4ncyBleHBsYW5hdGlvbiBlbWFpbCkgdG8gCmNv dmVyIDk5JSBvZiB0aGUgY2FzZXMuIEFuZCB0aGVuIHRoZSByZW1haW5pbmcgMSUgY291bGQgYmUg ZmluZSB3aXRoIGEgCjEwdXMgZGVsYXk/CgpPdGhlcndpc2Ugd2UgYXJlIGVmZmVjdGl2ZWx5IG1h a2luZyBfd2FpdF9mb3IgcGFydGlhbGx5IGJ1c3kgbG9vcGluZywgb3IgCndoYXRldmVyIHRoZSBp bmVmZmljaWVuY3kgaW4gPDEwdXMgdXNsZWVwIGlzLiBJIG1lYW4sIGl0IG1ha2VzIG5vIApwcmFj dGljYWwgZGlmZmVyZW5jZSB0byBtYWtlIGEgaGFuZGZ1bCBvZiBxdWljayBsb29wcyB0aGVyZSBi dXQgaXQgZmVlbHMgCmEgYml0IGluZWxlZ2FudC4KClJlZ2FyZHMsCgpUdnJ0a28KX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcg bGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRl c2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==