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Fri, 14 Aug 2020 17:08:00 +0800 Message-ID: <1597396082.32469.58.camel@mtkswgap22> Subject: Re: [PATCH v2 2/2] mm: proc: smaps_rollup: do not stall write attempts on mmap_lock From: Chinwen Chang To: Michel Lespinasse CC: Matthias Brugger , Andrew Morton , Vlastimil Babka , "Daniel Jordan" , Davidlohr Bueso , Alexey Dobriyan , "Matthew Wilcox (Oracle)" , Jason Gunthorpe , Steven Price , Song Liu , Jimmy Assarsson , Huang Ying , LKML , , , , Date: Fri, 14 Aug 2020 17:08:02 +0800 In-Reply-To: References: <1597284810-17454-1-git-send-email-chinwen.chang@mediatek.com> <1597284810-17454-3-git-send-email-chinwen.chang@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-MTK: N Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gRnJpLCAyMDIwLTA4LTE0IGF0IDAxOjM1IC0wNzAwLCBNaWNoZWwgTGVzcGluYXNzZSB3cm90 ZToNCj4gT24gV2VkLCBBdWcgMTIsIDIwMjAgYXQgNzoxMyBQTSBDaGlud2VuIENoYW5nDQo+IDxj aGlud2VuLmNoYW5nQG1lZGlhdGVrLmNvbT4gd3JvdGU6DQo+ID4gc21hcHNfcm9sbHVwIHdpbGwg dHJ5IHRvIGdyYWIgbW1hcF9sb2NrIGFuZCBnbyB0aHJvdWdoIHRoZSB3aG9sZSB2bWENCj4gPiBs aXN0IHVudGlsIGl0IGZpbmlzaGVzIHRoZSBpdGVyYXRpbmcuIFdoZW4gZW5jb3VudGVyaW5nIGxh cmdlIHByb2Nlc3NlcywNCj4gPiB0aGUgbW1hcF9sb2NrIHdpbGwgYmUgaGVsZCBmb3IgYSBsb25n ZXIgdGltZSwgd2hpY2ggbWF5IGJsb2NrIG90aGVyDQo+ID4gd3JpdGUgcmVxdWVzdHMgbGlrZSBt bWFwIGFuZCBtdW5tYXAgZnJvbSBwcm9ncmVzc2luZyBzbW9vdGhseS4NCj4gPg0KPiA+IFRoZXJl IGFyZSB1cGNvbWluZyBtbWFwX2xvY2sgb3B0aW1pemF0aW9ucyBsaWtlIHJhbmdlLWJhc2VkIGxv Y2tzLCBidXQNCj4gPiB0aGUgbG9jayBhcHBsaWVkIHRvIHNtYXBzX3JvbGx1cCB3b3VsZCBiZSB0 aGUgY29hcnNlIHR5cGUsIHdoaWNoIGRvZXNuJ3QNCj4gPiBhdm9pZCB0aGUgb2NjdXJyZW5jZSBv ZiB1bnBsZWFzYW50IGNvbnRlbnRpb24uDQo+ID4NCj4gPiBUbyBzb2x2ZSBhZm9yZW1lbnRpb25l ZCBpc3N1ZSwgd2UgYWRkIGEgY2hlY2sgd2hpY2ggZGV0ZWN0cyB3aGV0aGVyDQo+ID4gYW55b25l IHdhbnRzIHRvIGdyYWIgbW1hcF9sb2NrIGZvciB3cml0ZSBhdHRlbXB0cy4NCj4gDQo+IEkgdGhp bmsgeW91ciByZXRyeSBtZWNoYW5pc20gc3RpbGwgZG9lc24ndCBoYW5kbGUgYWxsIGNhc2VzLiBX aGVuIHlvdQ0KPiBnZXQgYmFjayB0aGUgbW1hcCBsb2NrLCB0aGUgYWRkcmVzcyB3aGVyZSB5b3Ug c3RvcHBlZCBsYXN0IHRpbWUgY291bGQNCj4gbm93IGJlIGluIHRoZSBtaWRkbGUgb2YgYSB2bWEu IEkgdGhpbmsgdGhlIGNvbnNpc3RlbnQgdGhpbmcgdG8gZG8gaW4NCj4gdGhhdCBjYXNlIHdvdWxk IGJlIHRvIHJldHJ5IHNjYW5uaW5nIGZyb20gdGhlIGFkZHJlc3MgeW91IHN0b3BwZWQgYXQsDQo+ IGV2ZW4gaWYgaXQncyBub3Qgb24gYSB2bWEgYm91bmRhcnkgYW55bW9yZS4gWW91IG1heSBoYXZl IHRvIGNoYW5nZQ0KPiBzbWFwX2dhdGhlcl9zdGF0cyB0byBzdXBwb3J0IHRoYXQsIHRob3VnaC4N Cg0KSGkgTWljaGVsLA0KDQpJIHRoaW5rIEkgZ290IHlvdXIgcG9pbnQuIExldCBtZSB0cnkgdG8g cHJlcGFyZSBuZXcgcGF0Y2ggc2VyaWVzIGZvcg0KZnVydGhlciByZXZpZXdzLg0KDQpUaGFuayB5 b3UgZm9yIHlvdXIgc3VnZ2VzdGlvbiA6KQ0KDQpDaGlud2VuDQo=