From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wilson Subject: Re: [PATCH 2/2] drm/i915: Skip object locking around a no-op set-domain ioctl Date: Fri, 22 Mar 2019 14:33:24 +0000 Message-ID: <155326520389.26447.17520743845939052475@skylake-alporthouse-com> References: <20190321161908.8007-1-chris@chris-wilson.co.uk> <20190321161908.8007-2-chris@chris-wilson.co.uk> <20190322142837.GY3888@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from fireflyinternet.com (mail.fireflyinternet.com [109.228.58.192]) by gabe.freedesktop.org (Postfix) with ESMTPS id 34B216E3B2 for ; Fri, 22 Mar 2019 14:33:30 +0000 (UTC) In-Reply-To: <20190322142837.GY3888@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org UXVvdGluZyBWaWxsZSBTeXJqw6Rsw6QgKDIwMTktMDMtMjIgMTQ6Mjg6MzcpCj4gT24gVGh1LCBN YXIgMjEsIDIwMTkgYXQgMDQ6MTk6MDhQTSArMDAwMCwgQ2hyaXMgV2lsc29uIHdyb3RlOgo+ID4g SWYgd2UgYXJlIGFscmVhZHkgaW4gdGhlIGRlc2lyZWQgd3JpdGUgZG9tYWluIG9mIGEgc2V0LWRv bWFpbiBpb2N0bCwKPiA+IHRoZW4gdGhlcmUgaXMgbm90aGluZyBmb3IgdXMgdG8gZG8gYW5kIHdl IGNhbiBxdWlja2x5IHJldHVybiBiYWNrIHRvCj4gPiB1c2Vyc3BhY2UsIGF2b2lkaW5nIGFueSBs b2NrIGNvbnRlbnRpb24uIEJ5IHJlY29nbmlzaW5nIHRoYXQgdGhlCj4gPiB3cml0ZV9kb21haW4g aXMgYWx3YXlzIGEgc3Vic2V0IG9mIHRoZSByZWFkX2RvbWFpbnMsIGFuZCBleGNsdWRpbmcgdGhl Cj4gPiBuby1vcCBjYXNlIG9mIHJlcXVpcmluZyAwIHJlYWRfZG9tYWlucyBpbiB0aGUgaW9jdGws IHdlIGNhbiBpbmZlciBpZiB0aGUKPiA+IGN1cnJlbnQgd3JpdGVfZG9tYWluIG1hdGNoZXMgdGhl IHRhcmdldCByZWFkX2RvbWFpbnMsIHRoZXJlIGlzIG5vdGhpbmcKPiA+IGZvciB1cyB0byBkby4K PiA+IAo+ID4gU2Vjb25kYXJ5IGFzcGVjdCBvZiB0aGlzIGlzIHRoYXQgd2UgdW5kbyB0aGUgYXJi aXRyYXJ5IGZldGNoaW5nIGFuZAo+ID4gcG90ZW50aWFsIGZsdXNoaW5nIG9mIGFsbCBwYWdlcyBm b3IgYSBzZXQtZG9tYWluKC53cml0ZT1DUFUpIGNhbGwgb24gYQo+ID4gZnJlc2ggb2JqZWN0IC0t IHdoaWNoIHdhcyBpbnRyb2R1Y2VkIHNpbXBseSBiZWNhdXNlIHdlIGRvIHRoZSBnZXQtcGFnZXMK PiA+IGJlZm9yZSB0YWtpbmcgdGhlIHN0cnVjdF9tdXRleC4KPiA+IAo+ID4gUmVmZXJlbmNlczog NDBlNjJkNWQ2YmU4ICgiZHJtL2k5MTU6IEFjcXVpcmUgdGhlIGJhY2tpbmcgc3RvcmFnZSBvdXRz aWRlIG9mIHN0cnVjdF9tdXRleCBpbiBzZXQtZG9tYWluIikKPiA+IFNpZ25lZC1vZmYtYnk6IENo cmlzIFdpbHNvbiA8Y2hyaXNAY2hyaXMtd2lsc29uLmNvLnVrPgo+ID4gQ2M6IEpvb25hcyBMYWh0 aW5lbiA8am9vbmFzLmxhaHRpbmVuQGxpbnV4LmludGVsLmNvbT4KPiA+IENjOiBNYXR0aGV3IEF1 bGQgPG1hdHRoZXcud2lsbGlhbS5hdWxkQGdtYWlsLmNvbT4KPiA+IC0tLQo+ID4gIGRyaXZlcnMv Z3B1L2RybS9pOTE1L2k5MTVfZ2VtLmMgfCAyNiArKysrKysrKysrKysrKysrKysrKysrKy0tLQo+ ID4gIDEgZmlsZSBjaGFuZ2VkLCAyMyBpbnNlcnRpb25zKCspLCAzIGRlbGV0aW9ucygtKQo+ID4g Cj4gPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9nZW0uYyBiL2RyaXZl cnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtLmMKPiA+IGluZGV4IDcyMzc0ZTk1MmU0Yi4uMzZmNTU3 MDAyMDA1IDEwMDY0NAo+ID4gLS0tIGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9nZW0uYwo+ ID4gKysrIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9nZW0uYwo+ID4gQEAgLTE0ODQsMTcg KzE0ODQsMzcgQEAgaTkxNV9nZW1fc2V0X2RvbWFpbl9pb2N0bChzdHJ1Y3QgZHJtX2RldmljZSAq ZGV2LCB2b2lkICpkYXRhLAo+ID4gICAgICAgaWYgKCh3cml0ZV9kb21haW4gfCByZWFkX2RvbWFp bnMpICYgSTkxNV9HRU1fR1BVX0RPTUFJTlMpCj4gPiAgICAgICAgICAgICAgIHJldHVybiAtRUlO VkFMOwo+ID4gIAo+ID4gLSAgICAgLyogSGF2aW5nIHNvbWV0aGluZyBpbiB0aGUgd3JpdGUgZG9t YWluIGltcGxpZXMgaXQncyBpbiB0aGUgcmVhZAo+ID4gKyAgICAgLyoKPiA+ICsgICAgICAqIEhh dmluZyBzb21ldGhpbmcgaW4gdGhlIHdyaXRlIGRvbWFpbiBpbXBsaWVzIGl0J3MgaW4gdGhlIHJl YWQKPiA+ICAgICAgICAqIGRvbWFpbiwgYW5kIG9ubHkgdGhhdCByZWFkIGRvbWFpbi4gIEVuZm9y Y2UgdGhhdCBpbiB0aGUgcmVxdWVzdC4KPiA+ICAgICAgICAqLwo+ID4gLSAgICAgaWYgKHdyaXRl X2RvbWFpbiAhPSAwICYmIHJlYWRfZG9tYWlucyAhPSB3cml0ZV9kb21haW4pCj4gPiArICAgICBp ZiAod3JpdGVfZG9tYWluICYmIHJlYWRfZG9tYWlucyAhPSB3cml0ZV9kb21haW4pCj4gPiAgICAg ICAgICAgICAgIHJldHVybiAtRUlOVkFMOwo+ID4gIAo+ID4gKyAgICAgaWYgKCFyZWFkX2RvbWFp bnMpCj4gPiArICAgICAgICAgICAgIHJldHVybiAwOwo+IAo+IEhvcGVmdWxseSBubyBvbmUgaXMg cmVseWluZyBvbiByZWFkX2RvbWFpbnM9PTAgbWVhbmluZyBjcHUgZG9tYWluLgo+IFRoYXQgc2Vl bXMgdG8gYmUgaG93IHRoaXMgd2FzIGhhbmRsZWQgYmVmb3JlLgoKSG9wZWZ1bGx5IG5vdC4gTm9u ZSBvZiB0aGUgdXNlcnNwYWNlIGhhcyB0cmllZCB0aGF0LCBhbmQgSSBob3BlIHRoYXQgdGhlCmlk ZWEgb2Ygd3JpdGVfZG9tYWluPT0wIG1lYW5pbmcgZG9uJ3Qgc2V0IGEgd3JpdGVfZG9tYWluIGhh cyBjb25kaXRpb25lZApldmVyeW9uZSBpbnRvIG5vdCB1c2luZyBpdC4KCj4gT3IgbWF5YmUgd2Ug d2FudCAtRUlWTkFMIGhlcmU/CgpJbnRyb2R1Y2luZyBuZXcgLUVJTlZBTCBpcyBhbHNvIHJpc2t5 LgoKSG1tLiBTbyBpbiBjYXNlIG9mIHRyb3VibGUgd2Ugc2hvdWxkCgoJaWYgKCFyZWFkX2RvbWFp bnMpCgkJcmVhZF9kb21haW4gPSBET01BSU5fQ1BVLgoKSG9wZWZ1bGx5IG5vIG9uZSBldmVuIG5v dGljZXMgc3VjaCBhIHN1YnRsZSBBQkkgY2hhbmdlLiBCdWd6aWxsYSB3YXRjaApvdXQhCi1DaHJp cwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1n ZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9s aXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZng=