From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx106.postini.com [74.125.245.106]) by kanga.kvack.org (Postfix) with SMTP id 028CB6B0033 for ; Tue, 23 Jul 2013 21:31:37 -0400 (EDT) From: Lisa Du Date: Tue, 23 Jul 2013 18:31:02 -0700 Subject: RE: Possible deadloop in direct reclaim? Message-ID: <89813612683626448B837EE5A0B6A7CB3B62F8F5CE@SC-VEXCH4.marvell.com> References: <89813612683626448B837EE5A0B6A7CB3B62F8F272@SC-VEXCH4.marvell.com> In-Reply-To: Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Bob Liu Cc: "linux-mm@kvack.org" , Christoph Lameter , Mel Gorman RGVhciBCb2INCiAgICBUaGFuayB5b3Ugc28gbXVjaCBmb3IgdGhlIGNhcmVmdWwgcmV2aWV3LCBZ ZXMsIGl0J3MgYSB0eXBvLCBJIG1lYW4gem9uZS0+YWxsX3VucmVjbGFpbWFibGUgPSAwLg0KICAg IFlvdSBtZW50aW9uZWQgYWRkIHRoZSBjaGVjayBpbiBrc3dhcGRfc2hyaW5rX3pvbmUoKSwgc29y cnkgdGhhdCBJIGRpZG4ndCBmaW5kIHRoaXMgZnVuY3Rpb24gaW4ga2VybmVsMy40IG9yIGtlcm5l bDMuOS4NCiAgICBJcyB0aGlzIGZ1bmN0aW9uIGNhbGxlZCBpbiBkaXJlY3RfcmVjbGFpbT8gDQog ICAgQXMgSSBtZW50aW9uZWQgdGhpcyBpc3N1ZSBoYXBwZW5lZCBhZnRlciBrc3dhcGQgdGhyZWFk IHNsZWVwLCBpZiBpdCBvbmx5IGNhbGxlZCBpbiBrc3dhcGQsIHRoZW4gSSB0aGluayBpdCBjYW4n dCBoZWxwLg0KDQpUaGFua3MhDQoNCkJlc3QgUmVnYXJkcw0KTGlzYSBEdQ0KDQoNCi0tLS0tT3Jp Z2luYWwgTWVzc2FnZS0tLS0tDQpGcm9tOiBCb2IgTGl1IFttYWlsdG86bGxpdWJib0BnbWFpbC5j b21dIA0KU2VudDogMjAxM+W5tDfmnIgyNOaXpSA5OjE4DQpUbzogTGlzYSBEdQ0KQ2M6IGxpbnV4 LW1tQGt2YWNrLm9yZzsgQ2hyaXN0b3BoIExhbWV0ZXI7IE1lbCBHb3JtYW4NClN1YmplY3Q6IFJl OiBQb3NzaWJsZSBkZWFkbG9vcCBpbiBkaXJlY3QgcmVjbGFpbT8NCg0KT24gVHVlLCBKdWwgMjMs IDIwMTMgYXQgMTI6NTggUE0sIExpc2EgRHUgPGNsZHVAbWFydmVsbC5jb20+IHdyb3RlOg0KPiBE ZWFyIFNpcjoNCj4NCj4gQ3VycmVudGx5IEkgbWV0IGEgcG9zc2libGUgZGVhZGxvb3AgaW4gZGly ZWN0IHJlY2xhaW0uIEFmdGVyIHJ1biBwbGVudHkgb2YNCj4gdGhlIGFwcGxpY2F0aW9uLCBzeXN0 ZW0gcnVuIGludG8gYSBzdGF0dXMgdGhhdCBzeXN0ZW0gbWVtb3J5IGlzIHZlcnkNCj4gZnJhZ21l bnRpemVkLiBMaWtlIG9ubHkgb3JkZXItMCBhbmQgb3JkZXItMSBtZW1vcnkgbGVmdC4NCj4NCj4g VGhlbiBvbmUgcHJvY2VzcyByZXF1aXJlZCBhIG9yZGVyLTIgYnVmZmVyIGJ1dCBpdCBlbnRlciBh biBlbmRsZXNzIGRpcmVjdA0KPiByZWNsYWltLiBGcm9tIG15IHRyYWNlIGxvZywgSSBjYW4gc2Vl IHRoaXMgbG9vcCBhbHJlYWR5IG92ZXIgMjAwLDAwMCB0aW1lcy4NCj4gS3N3YXBkIHdhcyBmaXJz dCB3YWtlIHVwIGFuZCB0aGVuIGdvIGJhY2sgdG8gc2xlZXAgYXMgaXQgY2Fubm90IHJlYmFsYW5j ZQ0KPiB0aGlzIG9yZGVy4oCZcyBtZW1vcnkuIEJ1dCB6b25lLT5hbGxfdW5yZWNsYWltYWJsZSBy ZW1haW5zIDEuDQo+DQo+IFRob3VnaCBkaXJlY3RfcmVjbGFpbSBldmVyeSB0aW1lIHJldHVybnMg bm8gcGFnZXMsIGJ1dCBhcw0KPiB6b25lLT5hbGxfdW5yZWNsYWltYWJsZSA9IDEsIHNvIGl0IGxv b3AgYWdhaW4gYW5kIGFnYWluLiBFdmVuIHdoZW4NCj4gem9uZS0+cGFnZXNfc2Nhbm5lZCBhbHNv IGJlY29tZXMgdmVyeSBsYXJnZS4gSXQgd2lsbCBibG9jayB0aGUgcHJvY2VzcyBmb3INCj4gbG9u ZyB0aW1lLCB1bnRpbCBzb21lIHdhdGNoZG9nIHRocmVhZCBkZXRlY3QgdGhpcyBhbmQga2lsbCB0 aGlzIHByb2Nlc3MuDQo+IFRob3VnaCBpdOKAmXMgaW4gX19hbGxvY19wYWdlc19zbG93cGF0aCwg YnV0IGl04oCZcyB0b28gc2xvdyByaWdodD8gTWF5YmUgY29zdA0KPiBvdmVyIDUwIHNlY29uZHMg b3IgZXZlbiBtb3JlLg0KDQpZb3UgbXVzdCBiZSBtZWFuIHpvbmUtPmFsbF91bnJlY2xhaW1hYmxl ID0gMD8NCg0KPg0KPiBJIHRoaW5rIGl04oCZcyBub3QgYXMgZXhwZWN0ZWQgcmlnaHQ/ICBDYW4g d2UgYWxzbyBhZGQgYmVsb3cgY2hlY2sgaW4gdGhlDQo+IGZ1bmN0aW9uIGFsbF91bnJlY2xhaW1h YmxlKCkgdG8gdGVybWluYXRlIHRoaXMgbG9vcD8NCj4NCj4NCj4NCj4gQEAgLTIzNTUsNiArMjM1 NSw4IEBAIHN0YXRpYyBib29sIGFsbF91bnJlY2xhaW1hYmxlKHN0cnVjdCB6b25lbGlzdA0KPiAq em9uZWxpc3QsDQo+DQo+ICAgICAgICAgICAgICAgICAgICAgICAgIGNvbnRpbnVlOw0KPg0KPiAg ICAgICAgICAgICAgICAgaWYgKCF6b25lLT5hbGxfdW5yZWNsYWltYWJsZSkNCj4NCj4gICAgICAg ICAgICAgICAgICAgICAgICAgcmV0dXJuIGZhbHNlOw0KPg0KPiArICAgICAgICAgICAgICAgaWYg KHNjLT5ucl9yZWNsYWltZWQgPT0gMCAmJiAhem9uZV9yZWNsYWltYWJsZSh6b25lKSkNCj4NCj4g KyAgICAgICAgICAgICAgICAgICAgICAgcmV0dXJuIHRydWU7DQo+DQoNCkhvdyBhYm91dCByZXBs YWNlIHRoZSBjaGVja2luZyBpbiBrc3dhcGRfc2hyaW5rX3pvbmUoKT8NCg0KQEAgLTI4MjQsNyAr MjgyNCw3IEBAIHN0YXRpYyBib29sIGtzd2FwZF9zaHJpbmtfem9uZShzdHJ1Y3Qgem9uZSAqem9u ZSwNCiAgICAgICAgLyogQWNjb3VudCBmb3IgdGhlIG51bWJlciBvZiBwYWdlcyBhdHRlbXB0ZWQg dG8gcmVjbGFpbSAqLw0KICAgICAgICAqbnJfYXR0ZW1wdGVkICs9IHNjLT5ucl90b19yZWNsYWlt Ow0KDQotICAgICAgIGlmIChucl9zbGFiID09IDAgJiYgIXpvbmVfcmVjbGFpbWFibGUoem9uZSkp DQorICAgICAgIGlmIChzYy0+bnJfcmVjbGFpbWVkID09IDAgJiYgIXpvbmVfcmVjbGFpbWFibGUo em9uZSkpDQogICAgICAgICAgICAgICAgem9uZS0+YWxsX3VucmVjbGFpbWFibGUgPSAxOw0KDQog ICAgICAgIHpvbmVfY2xlYXJfZmxhZyh6b25lLCBaT05FX1dSSVRFQkFDSyk7DQoNCg0KSSB0aGlu ayB0aGUgY3VycmVudCBjaGVjayBpcyB3cm9uZywgcmVjbGFpbWVkIGEgc2xhYiBkb2Vzbid0IG1l YW4NCnJlY2xhaW1lZCBhIHBhZ2UuDQoNCi0tIA0KUmVnYXJkcywNCi0tQm9iDQo= -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org