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Fri, 14 Aug 2020 00:11:26 +0800 Message-ID: <1597335088.32469.55.camel@mtkswgap22> Subject: Re: [PATCH v2 0/2] Try to release mmap_lock temporarily in smaps_rollup 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 00:11:28 +0800 In-Reply-To: References: <1597284810-17454-1-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 T24gVGh1LCAyMDIwLTA4LTEzIGF0IDAyOjUzIC0wNzAwLCBNaWNoZWwgTGVzcGluYXNzZSB3cm90 ZToNCj4gT24gV2VkLCBBdWcgMTIsIDIwMjAgYXQgNzoxNCBQTSBDaGlud2VuIENoYW5nDQo+IDxj aGlud2VuLmNoYW5nQG1lZGlhdGVrLmNvbT4gd3JvdGU6DQo+ID4gUmVjZW50bHksIHdlIGhhdmUg b2JzZXJ2ZWQgc29tZSBqYW5reSBpc3N1ZXMgY2F1c2VkIGJ5IHVucGxlYXNhbnRseSBsb25nDQo+ ID4gY29udGVudGlvbiBvbiBtbWFwX2xvY2sgd2hpY2ggaXMgaGVsZCBieSBzbWFwc19yb2xsdXAg d2hlbiBwcm9iaW5nIGxhcmdlDQo+ID4gcHJvY2Vzc2VzLiBUbyBhZGRyZXNzIHRoZSBwcm9ibGVt LCB3ZSBsZXQgc21hcHNfcm9sbHVwIGRldGVjdCBpZiBhbnlvbmUNCj4gPiB3YW50cyB0byBhY3F1 aXJlIG1tYXBfbG9jayBmb3Igd3JpdGUgYXR0ZW1wdHMuIElmIHllcywganVzdCByZWxlYXNlIHRo ZQ0KPiA+IGxvY2sgdGVtcG9yYXJpbHkgdG8gZWFzZSB0aGUgY29udGVudGlvbi4NCj4gPg0KPiA+ IHNtYXBzX3JvbGx1cCBpcyBhIHByb2NmcyBpbnRlcmZhY2Ugd2hpY2ggYWxsb3dzIHVzZXJzIHRv IHN1bW1hcml6ZSB0aGUNCj4gPiBwcm9jZXNzJ3MgbWVtb3J5IHVzYWdlIHdpdGhvdXQgdGhlIG92 ZXJoZWFkIG9mIHNlcV8qIGNhbGxzLiBBbmRyb2lkIHVzZXMgaXQNCj4gPiB0byBzYW1wbGUgdGhl IG1lbW9yeSB1c2FnZSBvZiB2YXJpb3VzIHByb2Nlc3NlcyB0byBiYWxhbmNlIGl0cyBtZW1vcnkg cG9vbA0KPiA+IHNpemVzLiBJZiBubyBvbmUgd2FudHMgdG8gdGFrZSB0aGUgbG9jayBmb3Igd3Jp dGUgcmVxdWVzdHMsIHNtYXBzX3JvbGx1cA0KPiA+IHdpdGggdGhpcyBwYXRjaCB3aWxsIGJlaGF2 ZSBsaWtlIHRoZSBvcmlnaW5hbCBvbmUuDQo+ID4NCj4gPiBBbHRob3VnaCB0aGVyZSBhcmUgb24t Z29pbmcgbW1hcF9sb2NrIG9wdGltaXphdGlvbnMgbGlrZSByYW5nZS1iYXNlZCBsb2NrcywNCj4g PiB0aGUgbG9jayBhcHBsaWVkIHRvIHNtYXBzX3JvbGx1cCB3b3VsZCBiZSB0aGUgY29hcnNlIG9u ZSwgd2hpY2ggaXMgaGFyZCB0bw0KPiA+IGF2b2lkIHRoZSBvY2N1cnJlbmNlIG9mIGFmb3JlbWVu dGlvbmVkIGlzc3Vlcy4gU28gdGhlIGRldGVjdGlvbiBhbmQNCj4gPiB0ZW1wb3JhcnkgcmVsZWFz ZSBmb3Igd3JpdGUgYXR0ZW1wdHMgb24gbW1hcF9sb2NrIGluIHNtYXBzX3JvbGx1cCBpcyBzdGls bA0KPiA+IG5lY2Vzc2FyeS4NCj4gDQo+IEkgZG8gbm90IG1pbmQgZXh0ZW5kaW5nIHRoZSBtbWFw IGxvY2sgQVBJIGFzIG5lZWRlZC4gSG93ZXZlciwgaW4gdGhlDQo+IHBhc3QgSSBoYXZlIHRyaWVk IGFkZGluZyByd3NlbV9pc19jb250ZW5kZWQgdG8gbWxvY2soKSwgYW5kIGxhdGVyIHRvDQo+IG1t X3BvcHVsYXRlKCkgcGF0aHMsIGFuZCBJSVJDIGdvdHRlbiBwdXNoYmFjayBvbiBpdCBib3RoIHRp bWVzLiBJDQo+IGRvbid0IGZlZWwgc3Ryb25nbHkgb24gdGhpcywgYnV0IHdvdWxkIHByZWZlciBp ZiBzb21lb25lIGVsc2UgYXBwcm92ZWQNCj4gdGhlIHJ3c2VtX2lzX2NvbnRlbmRlZCgpIHVzZSBj YXNlLg0KPiANCkhpIE1pY2hlbCwNCg0KVGhhbmsgeW91IGZvciB5b3VyIGtpbmQgZmVlZGJhY2su DQoNCkluIG15IG9waW5pb24sIHRoZSBkaWZmZXJlbmNlIGJldHdlZW4gdGhlIGNhc2UgaW4gc21h cHNfcm9sbHVwIGFuZCB0aGUNCm9uZSBpbiB5b3VyIGV4YW1wbGUgaXMgdGhhdCwgZm9yIHRoZSBm b3JtZXIsIHRoZSBpbnRlcmZlcmVuY2UgY29tZXMgZnJvbQ0KdGhlIG91dHNpZGUgb2YgdGhlIGFm ZmVjdGVkIHByb2Nlc3MsIGZvciB0aGUgbGF0dGVyLCBpdCBkb2Vzbid0Lg0KDQpJbiBvdGhlciB3 b3JkcywgYW55b25lIG1heSB1c2Ugc21hcHNfcm9sbHVwIHRvIHByb2JlIHRoZSBhZmZlY3RlZA0K cHJvY2VzcyB3aXRob3V0IHRoZSBpbmZvcm1hdGlvbiBhYm91dCB3aGF0IHN0ZXAgdGhlIGFmZmVj dGVkIG9uZSBpcw0KZXhlY3V0aW5nLg0KDQo+IENvdXBsZSByZWxhdGVkIHF1ZXN0aW9ucywgaG93 IG1hbnkgVk1BcyBhcmUgd2UgbG9va2luZyBhdCBoZXJlID8gV291bGQNCj4gbmVlZF9yZXNjaGVk KCkgYmUgd29ya2FibGUgdG9vID8NCj4gDQpJdCBkZXBlbmRzIG9uIHRoZSB0eXBlcyBvZiBhcHBs aWNhdGlvbnMuIFRoZSBudW1iZXIgb2YgVk1BcyB3ZSBhcmUNCmxvb2tpbmcgYXQgaXMgYXJvdW5k IDMwMDAgfiA0MDAwLg0KDQpBcyBmYXIgYXMgSSBrbm93LCBuZWVkX3Jlc2NoZWQoKSBpcyB1c2Vk IGJ5IHRoZSBjYWxsZXIgdG8gY2hlY2sgaWYgaXQNCnNob3VsZCByZWxlYXNlIHRoZSBDUFUgcmVz b3VyY2UgZm9yIG90aGVycy4gQnV0IGluIHRoZSBjYXNlIG9mDQpzbWFwc19yb2xsdXAsIHRoZSBh ZmZlY3RlZCBwcm9jZXNzIGlzIGNvbnRlbmRlZCBvbiB0aGUgbW1hcF9sb2NrLCBub3QNCndhaXRp bmcgZm9yIENQVS4gU28gbmVlZF9yZXNjaGVkKCkgbWF5IG5vdCBiZSB3b3JrYWJsZSBoZXJlLg0K DQpUaGFua3MgYWdhaW4gZm9yIHlvdXIgY29tbWVudC4NCkNoaW53ZW4NCg0K