From: Takashi Iwai Subject: Re: [PATCH] drm/fb-helper: Fix race between deferred_io worker and dirty updater Date: Thu, 20 Oct 2016 16:35:30 +0200 Message-ID: References: <20161020132055.9646-1-tiwai@suse.de> <20161020132814.GT4329@intel.com> <20161020141725.GU4329@intel.com> Mime-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id DE4506EB7F for ; Thu, 20 Oct 2016 14:35:31 +0000 (UTC) In-Reply-To: <20161020141725.GU4329@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Ville =?UTF-8?B?U3lyasOkbMOk?= Cc: Daniel Vetter , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org T24gVGh1LCAyMCBPY3QgMjAxNiAxNjoxNzoyNSArMDIwMCwKVmlsbGUgU3lyasOkbMOkIHdyb3Rl Ogo+IAo+IE9uIFRodSwgT2N0IDIwLCAyMDE2IGF0IDAzOjM2OjU0UE0gKzAyMDAsIFRha2FzaGkg SXdhaSB3cm90ZToKPiA+IE9uIFRodSwgMjAgT2N0IDIwMTYgMTU6Mjg6MTQgKzAyMDAsCj4gPiBW aWxsZSBTeXJqw6Rsw6Qgd3JvdGU6Cj4gPiA+IAo+ID4gPiBPbiBUaHUsIE9jdCAyMCwgMjAxNiBh dCAwMzoyMDo1NVBNICswMjAwLCBUYWthc2hpIEl3YWkgd3JvdGU6Cj4gPiA+ID4gU2luY2UgNC43 IGtlcm5lbCwgd2UndmUgc2VlbiB0aGUgZXJyb3IgbWVzc2FnZXMgbGlrZQo+ID4gPiA+IAo+ID4g PiA+ICBrZXJuZWw6IFtUVE1dIEJ1ZmZlciBldmljdGlvbiBmYWlsZWQKPiA+ID4gPiAga2VybmVs OiBxeGwgMDAwMDowMDowMi4wOiBvYmplY3RfaW5pdCBmYWlsZWQgZm9yICg0MDI2NTQwMDMyLCAw eDAwMDAwMDAxKQo+ID4gPiA+ICBrZXJuZWw6IFtkcm06cXhsX2FsbG9jX2JvX3Jlc2VydmVkIFtx eGxdXSAqRVJST1IqIGZhaWxlZCB0byBhbGxvY2F0ZSBWUkFNIEJPCj4gPiA+ID4gCj4gPiA+ID4g b24gUVhMIHdoZW4gc3dpdGNoaW5nIGFuZCBhY2Nlc3Npbmcgb24gVlQuICBUaGUgY3VscHJpdCB3 YXMgdGhlIGdlbmVyaWMKPiA+ID4gPiBkZWZlcnJlZF9pbyBjb2RlIChxeGwgZHJpdmVyIHN3aXRj aGVkIHRvIGl0IHNpbmNlIDQuNykuICBUaGVyZSBpcyBhCj4gPiA+ID4gcmFjZSBiZXR3ZWVuIHRo ZSBkaXJ0eSBjbGlwIHVwZGF0ZSBhbmQgdGhlIGNhbGwgb2YgY2FsbGJhY2suCj4gPiA+ID4gCj4g PiA+ID4gSW4gZHJtX2ZiX2hlbHBlcl9kaXJ0eSgpLCB0aGUgZGlydHkgY2xpcCBpcyB1cGRhdGVk IGluIHRoZSBzcGlubG9jaywKPiA+ID4gPiB3aGlsZSBpdCBraWNrcyBvZmYgdGhlIHVwZGF0ZSB3 b3JrZXIgb3V0c2lkZSB0aGUgc3BpbmxvY2suICBNZWFud2hpbGUKPiA+ID4gPiB0aGUgdXBkYXRl IHdvcmtlciBjbGVhcnMgdGhlIGRpcnR5IGNsaXAgaW4gdGhlIHNwaW5sb2NrLCB0b28uICBUaHVz LAo+ID4gPiA+IHdoZW4gZHJtX2ZiX2hlbHBlcl9kaXJ0eSgpIGlzIGNhbGxlZCBjb25jdXJyZW50 bHksIHNjaGVkdWxlX3dvcmsoKSBpcwo+ID4gPiA+IGNhbGxlZCBhZnRlciB0aGUgY2xpcCBpcyBj bGVhcmVkIGluIHRoZSBmaXJzdCB3b3JrZXIgY2FsbC4KPiA+ID4gCj4gPiA+IFdoeSBkb2VzIHRo YXQgbWF0dGVyPyBUaGUgZmlyc3Qgd29ya2VyIHNob3VsZCBoYXZlIGRvbmUgYWxsIHRoZQo+ID4g PiBuZWNlc3Nhcnkgd29yayBhbHJlYWR5LCBubz8KPiA+IAo+ID4gQmVmb3JlIHRoZSBmaXJzdCBj YWxsLCBpdCBjbGVhcnMgdGhlIGNsaXAgYW5kIHBhc3NlcyB0aGUgY29waWVkIGNsaXAKPiA+IHRv IHRoZSBjYWxsYmFjay4gIFRoZW4gdGhlIHNlY29uZCBjYWxsIHdpbGwgYmUgd2l0aCB0aGUgY2xl YXJlZCBhbmQKPiA+IHVudG91Y2hlZCBjbGlwLCBpLmUuIHdpdGggeDE9fjAuICBUaGlzIGNvbmZ1 c2VzCj4gPiBxeGxfZnJhbWVidWZmZXJfZGlydHkoKS4KPiA+IAo+ID4gT2YgY291cnNlLCB3ZSBj YW4gZmlsdGVyIG91dCBpbiB0aGUgY2FsbGJhY2sgc2lkZSBieSBjaGVja2luZyB0aGUKPiA+IGNs aXAuICBJdCB3YXMgYWN0dWFsbHkgbXkgZmlyc3QgdmVyc2lvbi4gIEJ1dCBiYXNpY2FsbHkgaXQn cyBhIHJhY2UKPiA+IGFuZCBzaG91bGQgYmUgY292ZXJlZCBiZXR0ZXIgaW4gdGhlIGNhbGxlciBz aWRlLgo+IAo+IFRoZSByYWNlIGlzIHN0aWxsIHRoZXJlIEFGQUlDUy4gVGhlIHdvcmtlciBtYXkg YWxyZWFkeSBiZSBleGVjdXRpbmcgYnV0Cj4gbm90IHlldCBpbiB0aGUgY3JpdGljYWwgc2VjdGlv biwgYXQgd2hpY2ggcG9pbnQgZHJtX2ZiX2hlbHBlcl9kaXJ0eSgpCj4gd2lsbCBleHBhbmQgdGhl IGRpcnR5IHJlY3RhbmdsZSwgYW5kIHNjaGVkdWxlIGFub3RoZXIgd29yay4gU28gdGhlIGZpcnN0 Cj4gd29ya2VyIHdpbGwgYWxyZWFkeSBzZWUgdGhlIGV4cGFuZGVkIHJlY3RhbmdsZSwgYW5kIHNl Y29uZCB3b3JrZXIgd2lsbAo+IGdldCB6aWxjaC4KCkhybSwgcmlnaHQsIHRoZXJlJ3MgYSBzbGln aHQgcmFjZSB3aW5kb3cgdGhlcmUuCgo+IEkgdGhpbmsgdGhlIG9ubHkgZ29vZCBmaXggaXMgdG8g aGF2ZSB0aGUgd29ya2VyIHZhbGlkYXRlIHRoZSBkaXJ0eQo+IHJlY3RhbmdsZSBiZWZvcmUgY2Fs bGluZyB0aGUgZHJpdmVyLgoKT0ssIGxldCBtZSBjb29rIGl0IHF1aWNrbHkuICAoSXQgd2FzIGFj dHVhbGx5IHRoZSBzZWNvbmQgdmVyc2lvbiBvZgp0aGUgcGF0Y2ggSSB3cm90ZSwgYW5kIEkgc2Vu dCB0aGUgdGhpcmQgb25lIDopCgoKdGhhbmtzLAoKVGFrYXNoaQpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwpkcmktZGV2ZWwgbWFpbGluZyBsaXN0CmRyaS1k ZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcv bWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK