From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: Re: [PATCH] drm: Avoid the double clflush on the last cache line in drm_clflush_virt_range() Date: Thu, 18 Jun 2015 17:37:47 +0200 Message-ID: <20150618153747.GK7752@phenom.ffwll.local> References: <1433948281-25791-1-git-send-email-chris@chris-wilson.co.uk> <557945EC.8000809@intel.com> <20150611083333.GH12731@nuc-i3427.alporthouse.com> <1434641478.30307.32.camel@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <1434641478.30307.32.camel@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Imre Deak Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org T24gVGh1LCBKdW4gMTgsIDIwMTUgYXQgMDY6MzE6MThQTSArMDMwMCwgSW1yZSBEZWFrIHdyb3Rl Ogo+IE9uIHRvLCAyMDE1LTA2LTExIGF0IDA5OjMzICswMTAwLCBDaHJpcyBXaWxzb24gd3JvdGU6 Cj4gPiBPbiBUaHUsIEp1biAxMSwgMjAxNSBhdCAwOToyNToxNkFNICswMTAwLCBEYXZlIEdvcmRv biB3cm90ZToKPiA+ID4gT24gMTAvMDYvMTUgMTU6NTgsIENocmlzIFdpbHNvbiB3cm90ZToKPiA+ ID4gPiBBcyB0aGUgY2xmbHVzaCBvcGVyYXRlcyBvbiBjYWNoZSBsaW5lcywgYW5kIHdlIGNhbiBm bHVzaCBhbnkgYnl0ZQo+ID4gPiA+IGFkZHJlc3MsIGluIG9yZGVyIHRvIGZsdXNoIGFsbCBieXRl cyBnaXZlbiBpbiB0aGUgcmFuZ2Ugd2UgaXNzdWUgYW4KPiA+ID4gPiBleHRyYSBjbGZsdXNoIG9u IHRoZSBsYXN0IGJ5dGUgdG8gZW5zdXJlIHRoZSBsYXN0IGNhY2hlbGluZSBpcyBmbHVzaGVkLgo+ ID4gPiA+IFdlIGNhbiBjYW4gdGhlIGl0ZXJhdGlvbiB0byBiZSBvdmVyIHRoZSBhY3R1YWwgY2Fj aGUgbGluZXMgdG8gYXZvaWQgdGhpcwo+ID4gPiA+IGRvdWJsZSBjbGZsdXNoIG9uIHRoZSBsYXN0 IGJ5dGUuCj4gPiA+ID4gCj4gPiA+ID4gU2lnbmVkLW9mZi1ieTogQ2hyaXMgV2lsc29uIDxjaHJp c0BjaHJpcy13aWxzb24uY28udWs+Cj4gPiA+ID4gQ2M6IEltcmUgRGVhayA8aW1yZS5kZWFrQGlu dGVsLmNvbT4KPiA+ID4gPiAtLS0KPiA+ID4gPiAgZHJpdmVycy9ncHUvZHJtL2RybV9jYWNoZS5j IHwgNSArKystLQo+ID4gPiA+ICAxIGZpbGUgY2hhbmdlZCwgMyBpbnNlcnRpb25zKCspLCAyIGRl bGV0aW9ucygtKQo+ID4gPiA+IAo+ID4gPiA+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0v ZHJtX2NhY2hlLmMgYi9kcml2ZXJzL2dwdS9kcm0vZHJtX2NhY2hlLmMKPiA+ID4gPiBpbmRleCA5 YTYyZDdhNTM1NTMuLjY3NDNmZjdkY2NmYSAxMDA2NDQKPiA+ID4gPiAtLS0gYS9kcml2ZXJzL2dw dS9kcm0vZHJtX2NhY2hlLmMKPiA+ID4gPiArKysgYi9kcml2ZXJzL2dwdS9kcm0vZHJtX2NhY2hl LmMKPiA+ID4gPiBAQCAtMTMwLDExICsxMzAsMTIgQEAgZHJtX2NsZmx1c2hfdmlydF9yYW5nZSh2 b2lkICphZGRyLCB1bnNpZ25lZCBsb25nIGxlbmd0aCkKPiA+ID4gPiAgewo+ID4gPiA+ICAjaWYg ZGVmaW5lZChDT05GSUdfWDg2KQo+ID4gPiA+ICAJaWYgKGNwdV9oYXNfY2xmbHVzaCkgewo+ID4g PiA+ICsJCWNvbnN0IGludCBzaXplID0gYm9vdF9jcHVfZGF0YS54ODZfY2xmbHVzaF9zaXplOwo+ ID4gPiA+ICAJCXZvaWQgKmVuZCA9IGFkZHIgKyBsZW5ndGg7Cj4gPiA+ID4gKwkJYWRkciA9ICh2 b2lkICopKCgodW5zaWduZWQgbG9uZylhZGRyKSAmIC1zaXplKTsKPiA+ID4gCj4gPiA+IFNob3Vs ZCB0aGlzIGNhc3QgYmUgdG8gdWludHB0cl90Pwo+ID4gCj4gPiBUaGUga2VybmVsIGhhcyBhIHN0 cmljdCBlcXVpdmFsZW5jZSBiZXR3ZWVuIHNpemVvZih1bnNpZ25lZCBsb25nKSBhbmQKPiA+IHNp emVvZihwb2ludGVyKS4gWW91IHdpbGwgc2VlIHVuc2lnbmVkIGxvbmcgdXNlZCB1bml2ZXJzYWxs eSB0byBwYXNzCj4gPiBhbG9uZyBwb2ludGVycyB0byBmdW5jdGlvbnMgYW5kIGFzIGNsb3N1cmVz Lgo+ID4gCj4gPiA+IE9yIGludHB0cl90LCBhcyBzaXplIGhhcyBzb21ld2hhdAo+ID4gPiBzdHJh bmdlbHkgYmVlbiBkZWZpbmVkIGFzIHNpZ25lZD8gVG8gY29tcGxldGUgdGhlIG1peCwgeDg2X2Ns Zmx1c2hfc2l6ZQo+ID4gPiBpcyAndTE2JyEgU28gbWF5YmUgd2Ugc2hvdWxkIHdyaXRlCj4gPiA+ IAo+ID4gPiArCQljb25zdCBzaXplX3Qgc2l6ZSA9IGJvb3RfY3B1X2RhdGEueDg2X2NsZmx1c2hf c2l6ZTsKPiA+ID4gKwkJY29uc3Qgc2l6ZV90IG1hc2sgPSB+KHNpemUgLSAxKTsKPiA+ID4gIAkJ dm9pZCAqZW5kID0gYWRkciArIGxlbmd0aDsKPiA+ID4gKwkJYWRkciA9ICh2b2lkICopKCgodWlu dHB0cl90KWFkZHIpICYgbWFzayk7Cj4gPiAKPiA+IE5vLiBzaXplX3QgaGFzIHZlcnkgcG9vciBk ZWZpbml0aW9uIGluc2lkZSB0aGUga2VybmVsIC0gd2hhdCBkb2VzIHRoZQo+ID4gbWF4aW11bSBz aXplIG9mIGEgdXNlcnNwYWNlIGFsbG9jYXRpb24gaGF2ZSB0byBkbyB3aXRoIGtlcm5lbCBpbnRl cm5hbHM/Cj4gPiAKPiA+IExldCdzIGtlZXAgdXNlcnNwYWNlIHR5cGVzIGluIHVzZXJzcGFjZSwg b3IgZWxzZSB3ZSBlbmQgdXAgd2l0aAo+ID4gaTkxNV9nZW1fZ3R0LmMuCj4gCj4gSSBhbHNvIHRo aW5rIHVzaW5nIHVuc2lnbmVkIGxvbmcgZm9yIHZpcnR1YWwgYWRkcmVzc2VzIGlzIHN0YW5kYXJk IGluCj4gdGhlIGtlcm5lbCBhbmQgSSBjYW4ndCBzZWUgaG93IHVzaW5nIGludCB3b3VsZCBsZWFk IHRvIHByb2JsZW1zIGdpdmVuCj4gdGhlIGV4cGVjdGVkIHJhbmdlIG9mIHg4Nl9jbGZsdXNoX3Np emUsIHNvIHRoaXMgbG9va3Mgb2sgdG8gbWU6Cj4gUmV2aWV3ZWQtYnk6IEltcmUgRGVhayA8aW1y ZS5kZWFrQGludGVsLmNvbT4KCkFwcGxpZWQgdG8gZHJtLW1pc2MsIHRoYW5rcy4KLURhbmllbAot LSAKRGFuaWVsIFZldHRlcgpTb2Z0d2FyZSBFbmdpbmVlciwgSW50ZWwgQ29ycG9yYXRpb24KaHR0 cDovL2Jsb2cuZmZ3bGwuY2gKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0 b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRl bC1nZngK