From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Wilson Subject: Re: [PATCH] drm: Avoid the double clflush on the last cache line in drm_clflush_virt_range() Date: Thu, 11 Jun 2015 09:33:33 +0100 Message-ID: <20150611083333.GH12731@nuc-i3427.alporthouse.com> References: <1433948281-25791-1-git-send-email-chris@chris-wilson.co.uk> <557945EC.8000809@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: <557945EC.8000809@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Dave Gordon Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org T24gVGh1LCBKdW4gMTEsIDIwMTUgYXQgMDk6MjU6MTZBTSArMDEwMCwgRGF2ZSBHb3Jkb24gd3Jv dGU6Cj4gT24gMTAvMDYvMTUgMTU6NTgsIENocmlzIFdpbHNvbiB3cm90ZToKPiA+IEFzIHRoZSBj bGZsdXNoIG9wZXJhdGVzIG9uIGNhY2hlIGxpbmVzLCBhbmQgd2UgY2FuIGZsdXNoIGFueSBieXRl Cj4gPiBhZGRyZXNzLCBpbiBvcmRlciB0byBmbHVzaCBhbGwgYnl0ZXMgZ2l2ZW4gaW4gdGhlIHJh bmdlIHdlIGlzc3VlIGFuCj4gPiBleHRyYSBjbGZsdXNoIG9uIHRoZSBsYXN0IGJ5dGUgdG8gZW5z dXJlIHRoZSBsYXN0IGNhY2hlbGluZSBpcyBmbHVzaGVkLgo+ID4gV2UgY2FuIGNhbiB0aGUgaXRl cmF0aW9uIHRvIGJlIG92ZXIgdGhlIGFjdHVhbCBjYWNoZSBsaW5lcyB0byBhdm9pZCB0aGlzCj4g PiBkb3VibGUgY2xmbHVzaCBvbiB0aGUgbGFzdCBieXRlLgo+ID4gCj4gPiBTaWduZWQtb2ZmLWJ5 OiBDaHJpcyBXaWxzb24gPGNocmlzQGNocmlzLXdpbHNvbi5jby51az4KPiA+IENjOiBJbXJlIERl YWsgPGltcmUuZGVha0BpbnRlbC5jb20+Cj4gPiAtLS0KPiA+ICBkcml2ZXJzL2dwdS9kcm0vZHJt X2NhY2hlLmMgfCA1ICsrKy0tCj4gPiAgMSBmaWxlIGNoYW5nZWQsIDMgaW5zZXJ0aW9ucygrKSwg MiBkZWxldGlvbnMoLSkKPiA+IAo+ID4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9kcm1f Y2FjaGUuYyBiL2RyaXZlcnMvZ3B1L2RybS9kcm1fY2FjaGUuYwo+ID4gaW5kZXggOWE2MmQ3YTUz NTUzLi42NzQzZmY3ZGNjZmEgMTAwNjQ0Cj4gPiAtLS0gYS9kcml2ZXJzL2dwdS9kcm0vZHJtX2Nh Y2hlLmMKPiA+ICsrKyBiL2RyaXZlcnMvZ3B1L2RybS9kcm1fY2FjaGUuYwo+ID4gQEAgLTEzMCwx MSArMTMwLDEyIEBAIGRybV9jbGZsdXNoX3ZpcnRfcmFuZ2Uodm9pZCAqYWRkciwgdW5zaWduZWQg bG9uZyBsZW5ndGgpCj4gPiAgewo+ID4gICNpZiBkZWZpbmVkKENPTkZJR19YODYpCj4gPiAgCWlm IChjcHVfaGFzX2NsZmx1c2gpIHsKPiA+ICsJCWNvbnN0IGludCBzaXplID0gYm9vdF9jcHVfZGF0 YS54ODZfY2xmbHVzaF9zaXplOwo+ID4gIAkJdm9pZCAqZW5kID0gYWRkciArIGxlbmd0aDsKPiA+ ICsJCWFkZHIgPSAodm9pZCAqKSgoKHVuc2lnbmVkIGxvbmcpYWRkcikgJiAtc2l6ZSk7Cj4gCj4g U2hvdWxkIHRoaXMgY2FzdCBiZSB0byB1aW50cHRyX3Q/CgpUaGUga2VybmVsIGhhcyBhIHN0cmlj dCBlcXVpdmFsZW5jZSBiZXR3ZWVuIHNpemVvZih1bnNpZ25lZCBsb25nKSBhbmQKc2l6ZW9mKHBv aW50ZXIpLiBZb3Ugd2lsbCBzZWUgdW5zaWduZWQgbG9uZyB1c2VkIHVuaXZlcnNhbGx5IHRvIHBh c3MKYWxvbmcgcG9pbnRlcnMgdG8gZnVuY3Rpb25zIGFuZCBhcyBjbG9zdXJlcy4KCj4gT3IgaW50 cHRyX3QsIGFzIHNpemUgaGFzIHNvbWV3aGF0Cj4gc3RyYW5nZWx5IGJlZW4gZGVmaW5lZCBhcyBz aWduZWQ/IFRvIGNvbXBsZXRlIHRoZSBtaXgsIHg4Nl9jbGZsdXNoX3NpemUKPiBpcyAndTE2JyEg U28gbWF5YmUgd2Ugc2hvdWxkIHdyaXRlCj4gCj4gKwkJY29uc3Qgc2l6ZV90IHNpemUgPSBib290 X2NwdV9kYXRhLng4Nl9jbGZsdXNoX3NpemU7Cj4gKwkJY29uc3Qgc2l6ZV90IG1hc2sgPSB+KHNp emUgLSAxKTsKPiAgCQl2b2lkICplbmQgPSBhZGRyICsgbGVuZ3RoOwo+ICsJCWFkZHIgPSAodm9p ZCAqKSgoKHVpbnRwdHJfdClhZGRyKSAmIG1hc2spOwoKTm8uIHNpemVfdCBoYXMgdmVyeSBwb29y IGRlZmluaXRpb24gaW5zaWRlIHRoZSBrZXJuZWwgLSB3aGF0IGRvZXMgdGhlCm1heGltdW0gc2l6 ZSBvZiBhIHVzZXJzcGFjZSBhbGxvY2F0aW9uIGhhdmUgdG8gZG8gd2l0aCBrZXJuZWwgaW50ZXJu YWxzPwoKTGV0J3Mga2VlcCB1c2Vyc3BhY2UgdHlwZXMgaW4gdXNlcnNwYWNlLCBvciBlbHNlIHdl IGVuZCB1cCB3aXRoCmk5MTVfZ2VtX2d0dC5jLgotQ2hyaXMKCi0tIApDaHJpcyBXaWxzb24sIElu dGVsIE9wZW4gU291cmNlIFRlY2hub2xvZ3kgQ2VudHJlCl9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwtZ2Z4 QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxt YW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==