From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joonas Lahtinen Subject: Re: [PATCH 1/3] drm/i915: Use pagecache write to prepopulate shmemfs from pwrite-ioctl Date: Mon, 06 Mar 2017 21:48:31 +0200 Message-ID: <1488829711.4701.14.camel@linux.intel.com> References: <20170306092916.11623-1-chris@chris-wilson.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id 346C16E168 for ; Mon, 6 Mar 2017 19:48:32 +0000 (UTC) In-Reply-To: <20170306092916.11623-1-chris@chris-wilson.co.uk> 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 T24gbWEsIDIwMTctMDMtMDYgYXQgMDk6MjkgKzAwMDAsIENocmlzIFdpbHNvbiB3cm90ZToKPiBC ZWZvcmUgd2UgaW5zdGFudGlhdGUvcGluIHRoZSBiYWNraW5nIHN0b3JlIGZvciBvdXIgdXNlLCB3 ZQo+IGNhbiBwcmVwb3B1bGF0ZSB0aGUgc2htZW1mcyBmaWxwIGVmZmljaWVudGx5IHVzaW5nIHRo ZSBhCj4gd3JpdGUgaW50byB0aGUgcGFnZWNhY2hlLiBXZSBhdm9pZCB0aGUgcGVuYWx0eSBvZiBp bnN0YW50aWF0aW5nCj4gYWxsIHRoZSBwYWdlcywgaW1wb3J0YW50IGlmIHRoZSB1c2VyIGlzIGp1 c3Qgd3JpdGluZyB0byBhIGZldwo+IGFuZCBuZXZlciB1c2VzIHRoZSBvYmplY3Qgb24gdGhlIEdQ VSwgYW5kIHVzaW5nIGEgZGlyZWN0IHdyaXRlCj4gaW50byBzaG1lbWZzIGFsbG93cyBpdCB0byBh dm9pZCB0aGUgY29zdCBvZiByZXRyaWV2aW5nIGEgcGFnZQo+IChlaXRoZXIgc3dhcGluIG9yIGNs ZWFyaW5nLWJlZm9yZS11c2UpIGJlZm9yZSBpdCBpcyBvdmVyd3JpdHRlbi4KPiAKPiBUaGlzIGNh biBiZSBleHRlbmRlZCBsYXRlciB0byBwcm92aWRlIGFkZGl0aW9uYWwgc3BlY2lhbGlzYXRpb24g Zm9yCj4gb3RoZXIgYmFja2VuZHMgKG90aGVyIHRoYW4gc2htZW1mcykuCj4gCj4gUmVmZXJlbmNl czogaHR0cHM6Ly9idWdzLmZyZWVkZXNrdG9wLm9yZy9zaG93X2J1Zy5jZ2k/aWQ9OTkxMDcKPiBT aWduZWQtb2ZmLWJ5OiBDaHJpcyBXaWxzb24gPGNocmlzQGNocmlzLXdpbHNvbi5jby51az4KPiBD YzogTWF0dGhldyBBdWxkIDxtYXR0aGV3LndpbGxpYW0uYXVsZEBnbWFpbC5jb20+Cj4gQ2M6IEpv b25hcyBMYWh0aW5lbiA8am9vbmFzLmxhaHRpbmVuQGxpbnV4LmludGVsLmNvbT4KPiBDYzogTWlr YSBLdW9wcGFsYSA8bWlrYS5rdW9wcGFsYUBsaW51eC5pbnRlbC5jb20+Cgo8U05JUD4KCj4gK3N0 YXRpYyBpbnQKPiAraTkxNV9nZW1fb2JqZWN0X3B3cml0ZV9ndHQoc3RydWN0IGRybV9pOTE1X2dl bV9vYmplY3QgKm9iaiwKPiArCQkJwqDCoMKgY29uc3Qgc3RydWN0IGRybV9pOTE1X2dlbV9wd3Jp dGUgKmFyZykKPiArewo+ICsJc3RydWN0IGFkZHJlc3Nfc3BhY2UgKm1hcHBpbmcgPSBvYmotPmJh c2UuZmlscC0+Zl9tYXBwaW5nOwo+ICsJY2hhciBfX3VzZXIgKnVzZXJfZGF0YSA9IHU2NF90b191 c2VyX3B0cihhcmctPmRhdGFfcHRyKTsKPiArCXU2NCByZW1haW4sIG9mZnNldDsKPiArCXVuc2ln bmVkIGludCBwZzsKPiArCj4gKwkvKiBCZWZvcmUgd2UgaW5zdGFudGlhdGUvcGluIHRoZSBiYWNr aW5nIHN0b3JlIGZvciBvdXIgdXNlLCB3ZQo+ICsJwqAqIGNhbiBwcmVwb3B1bGF0ZSB0aGUgc2ht ZW1mcyBmaWxwIGVmZmljaWVudGx5IHVzaW5nIHRoZSBhCj4gKwnCoCogd3JpdGUgaW50byB0aGUg cGFnZWNhY2hlLiBXZSBhdm9pZCB0aGUgcGVuYWx0eSBvZiBpbnN0YW50aWF0aW5nCj4gKwnCoCog YWxsIHRoZSBwYWdlcywgaW1wb3J0YW50IGlmIHRoZSB1c2VyIGlzIGp1c3Qgd3JpdGluZyB0byBh IGZldwo+ICsJwqAqIGFuZCBuZXZlciB1c2VzIHRoZSBvYmplY3Qgb24gdGhlIEdQVSwgYW5kIHVz aW5nIGEgZGlyZWN0IHdyaXRlCj4gKwnCoCogaW50byBzaG1lbWZzIGFsbG93cyBpdCB0byBhdm9p ZCB0aGUgY29zdCBvZiByZXRyaWV2aW5nIGEgcGFnZQo+ICsJwqAqIChlaXRoZXIgc3dhcGluIG9y IGNsZWFyaW5nLWJlZm9yZS11c2UpIGJlZm9yZSBpdCBpcyBvdmVyd3JpdHRlbi4KPiArCcKgKi8K PiArCWlmIChSRUFEX09OQ0Uob2JqLT5tbS5wYWdlcykpCj4gKwkJcmV0dXJuIC1FTk9ERVY7Cj4g Kwo+ICsJLyogQmVmb3JlIHRoZSBwYWdlcyBhcmUgaW5zdGFudGlvdGVkIHRoZSBvYmplY3QgaXMg dHJlYXRlZCBhcyBiZWluZwoKKmluc3RhbnRpYXRlZAoKPFNOSVA+Cgo+ICsJCWVyciA9IHBhZ2Vj YWNoZV93cml0ZV9lbmQob2JqLT5iYXNlLmZpbHAsIG1hcHBpbmcsIG9mZnNldCwKPiArCQkJCQnC oMKgbGVuLCBsZW4gLSB1bndyaXR0ZW4sCj4gKwkJCQkJwqDCoHBhZ2UsIGRhdGEpOwoKRGlkIHlv dSBkZWxpYmVyYXRlbHkgbWFrZSB0aGUgYXJndW1lbnRzIGRpZmZlcmVudCBmcm9tIHdyaXRlX2Jl Z2luPyA6KQoKSWYgdGhpcyBzb2x2ZXMgYSBwcm9ibGVtOwoKUmV2aWV3ZWQtYnk6IEpvb25hcyBM YWh0aW5lbiA8am9vbmFzLmxhaHRpbmVuQGxpbnV4LmludGVsLmNvbT4KCkJ1dCBzaG91bGQgd2Ug aW5zdGVhZCBmaXggbGlidmE/CgpSZWdhcmRzLCBKb29uYXMKLS0gCkpvb25hcyBMYWh0aW5lbgpP cGVuIFNvdXJjZSBUZWNobm9sb2d5IENlbnRlcgpJbnRlbCBDb3Jwb3JhdGlvbgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBs aXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVz a3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK