From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx194.postini.com [74.125.245.194]) by kanga.kvack.org (Postfix) with SMTP id 91A6F6B0031 for ; Tue, 23 Jul 2013 22:23:38 -0400 (EDT) From: Lisa Du Date: Tue, 23 Jul 2013 19:23:34 -0700 Subject: RE: Possible deadloop in direct reclaim? Message-ID: <89813612683626448B837EE5A0B6A7CB3B62F8F61A@SC-VEXCH4.marvell.com> References: <89813612683626448B837EE5A0B6A7CB3B62F8F272@SC-VEXCH4.marvell.com> 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: Lisa Du , Bob Liu Cc: "linux-mm@kvack.org" , Christoph Lameter , Mel Gorman RGVhciBCb2INCiAgIEFsc28gZnJvbSBteSBjaGVjayBiZWZvcmUga3N3YXBkIHNsZWVwLCB0aG91 Z2ggbnJfc2xhYiA9IDAgYnV0IHpvbmVfcmVjbGFpbWFibGUoem9uZSkgcmV0dXJucyB0cnVlLCBz byB6b25lLT5hbGxfdW5yZWNsYWltYWJsZSBjYW4ndCBiZSBjaGFuZ2VkIHRvIDE7IFNvIGV2ZW4g d2hlbiBjaGFuZ2UgdGhlIG5yX3NsYWIgdG8gc2MtPm5yX3JlY2xhaW1lZCwgaXQgY2FuJ3QgaGVs cC4NCg0KVGhhbmtzIQ0KDQpCZXN0IFJlZ2FyZHMNCkxpc2EgRHUNCg0KDQotLS0tLU9yaWdpbmFs IE1lc3NhZ2UtLS0tLQ0KRnJvbTogTGlzYSBEdSANClNlbnQ6IDIwMTPlubQ35pyIMjTml6UgOToz MQ0KVG86ICdCb2IgTGl1Jw0KQ2M6IGxpbnV4LW1tQGt2YWNrLm9yZzsgQ2hyaXN0b3BoIExhbWV0 ZXI7IE1lbCBHb3JtYW4NClN1YmplY3Q6IFJFOiBQb3NzaWJsZSBkZWFkbG9vcCBpbiBkaXJlY3Qg cmVjbGFpbT8NCg0KRGVhciBCb2INCiAgICBUaGFuayB5b3Ugc28gbXVjaCBmb3IgdGhlIGNhcmVm dWwgcmV2aWV3LCBZZXMsIGl0J3MgYSB0eXBvLCBJIG1lYW4gem9uZS0+YWxsX3VucmVjbGFpbWFi bGUgPSAwLg0KICAgIFlvdSBtZW50aW9uZWQgYWRkIHRoZSBjaGVjayBpbiBrc3dhcGRfc2hyaW5r X3pvbmUoKSwgc29ycnkgdGhhdCBJIGRpZG4ndCBmaW5kIHRoaXMgZnVuY3Rpb24gaW4ga2VybmVs My40IG9yIGtlcm5lbDMuOS4NCiAgICBJcyB0aGlzIGZ1bmN0aW9uIGNhbGxlZCBpbiBkaXJlY3Rf cmVjbGFpbT8gDQogICAgQXMgSSBtZW50aW9uZWQgdGhpcyBpc3N1ZSBoYXBwZW5lZCBhZnRlciBr c3dhcGQgdGhyZWFkIHNsZWVwLCBpZiBpdCBvbmx5IGNhbGxlZCBpbiBrc3dhcGQsIHRoZW4gSSB0 aGluayBpdCBjYW4ndCBoZWxwLg0KDQpUaGFua3MhDQoNCkJlc3QgUmVnYXJkcw0KTGlzYSBEdQ0K DQoNCi0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQpGcm9tOiBCb2IgTGl1IFttYWlsdG86bGxp dWJib0BnbWFpbC5jb21dIA0KU2VudDogMjAxM+W5tDfmnIgyNOaXpSA5OjE4DQpUbzogTGlzYSBE dQ0KQ2M6IGxpbnV4LW1tQGt2YWNrLm9yZzsgQ2hyaXN0b3BoIExhbWV0ZXI7IE1lbCBHb3JtYW4N ClN1YmplY3Q6IFJlOiBQb3NzaWJsZSBkZWFkbG9vcCBpbiBkaXJlY3QgcmVjbGFpbT8NCg0KT24g VHVlLCBKdWwgMjMsIDIwMTMgYXQgMTI6NTggUE0sIExpc2EgRHUgPGNsZHVAbWFydmVsbC5jb20+ IHdyb3RlOg0KPiBEZWFyIFNpcjoNCj4NCj4gQ3VycmVudGx5IEkgbWV0IGEgcG9zc2libGUgZGVh ZGxvb3AgaW4gZGlyZWN0IHJlY2xhaW0uIEFmdGVyIHJ1biBwbGVudHkgb2YNCj4gdGhlIGFwcGxp Y2F0aW9uLCBzeXN0ZW0gcnVuIGludG8gYSBzdGF0dXMgdGhhdCBzeXN0ZW0gbWVtb3J5IGlzIHZl cnkNCj4gZnJhZ21lbnRpemVkLiBMaWtlIG9ubHkgb3JkZXItMCBhbmQgb3JkZXItMSBtZW1vcnkg bGVmdC4NCj4NCj4gVGhlbiBvbmUgcHJvY2VzcyByZXF1aXJlZCBhIG9yZGVyLTIgYnVmZmVyIGJ1 dCBpdCBlbnRlciBhbiBlbmRsZXNzIGRpcmVjdA0KPiByZWNsYWltLiBGcm9tIG15IHRyYWNlIGxv ZywgSSBjYW4gc2VlIHRoaXMgbG9vcCBhbHJlYWR5IG92ZXIgMjAwLDAwMCB0aW1lcy4NCj4gS3N3 YXBkIHdhcyBmaXJzdCB3YWtlIHVwIGFuZCB0aGVuIGdvIGJhY2sgdG8gc2xlZXAgYXMgaXQgY2Fu bm90IHJlYmFsYW5jZQ0KPiB0aGlzIG9yZGVy4oCZcyBtZW1vcnkuIEJ1dCB6b25lLT5hbGxfdW5y ZWNsYWltYWJsZSByZW1haW5zIDEuDQo+DQo+IFRob3VnaCBkaXJlY3RfcmVjbGFpbSBldmVyeSB0 aW1lIHJldHVybnMgbm8gcGFnZXMsIGJ1dCBhcw0KPiB6b25lLT5hbGxfdW5yZWNsYWltYWJsZSA9 IDEsIHNvIGl0IGxvb3AgYWdhaW4gYW5kIGFnYWluLiBFdmVuIHdoZW4NCj4gem9uZS0+cGFnZXNf c2Nhbm5lZCBhbHNvIGJlY29tZXMgdmVyeSBsYXJnZS4gSXQgd2lsbCBibG9jayB0aGUgcHJvY2Vz cyBmb3INCj4gbG9uZyB0aW1lLCB1bnRpbCBzb21lIHdhdGNoZG9nIHRocmVhZCBkZXRlY3QgdGhp cyBhbmQga2lsbCB0aGlzIHByb2Nlc3MuDQo+IFRob3VnaCBpdOKAmXMgaW4gX19hbGxvY19wYWdl c19zbG93cGF0aCwgYnV0IGl04oCZcyB0b28gc2xvdyByaWdodD8gTWF5YmUgY29zdA0KPiBvdmVy IDUwIHNlY29uZHMgb3IgZXZlbiBtb3JlLg0KDQpZb3UgbXVzdCBiZSBtZWFuIHpvbmUtPmFsbF91 bnJlY2xhaW1hYmxlID0gMD8NCg0KPg0KPiBJIHRoaW5rIGl04oCZcyBub3QgYXMgZXhwZWN0ZWQg cmlnaHQ/ICBDYW4gd2UgYWxzbyBhZGQgYmVsb3cgY2hlY2sgaW4gdGhlDQo+IGZ1bmN0aW9uIGFs bF91bnJlY2xhaW1hYmxlKCkgdG8gdGVybWluYXRlIHRoaXMgbG9vcD8NCj4NCj4NCj4NCj4gQEAg LTIzNTUsNiArMjM1NSw4IEBAIHN0YXRpYyBib29sIGFsbF91bnJlY2xhaW1hYmxlKHN0cnVjdCB6 b25lbGlzdA0KPiAqem9uZWxpc3QsDQo+DQo+ICAgICAgICAgICAgICAgICAgICAgICAgIGNvbnRp bnVlOw0KPg0KPiAgICAgICAgICAgICAgICAgaWYgKCF6b25lLT5hbGxfdW5yZWNsYWltYWJsZSkN Cj4NCj4gICAgICAgICAgICAgICAgICAgICAgICAgcmV0dXJuIGZhbHNlOw0KPg0KPiArICAgICAg ICAgICAgICAgaWYgKHNjLT5ucl9yZWNsYWltZWQgPT0gMCAmJiAhem9uZV9yZWNsYWltYWJsZSh6 b25lKSkNCj4NCj4gKyAgICAgICAgICAgICAgICAgICAgICAgcmV0dXJuIHRydWU7DQo+DQoNCkhv dyBhYm91dCByZXBsYWNlIHRoZSBjaGVja2luZyBpbiBrc3dhcGRfc2hyaW5rX3pvbmUoKT8NCg0K QEAgLTI4MjQsNyArMjgyNCw3IEBAIHN0YXRpYyBib29sIGtzd2FwZF9zaHJpbmtfem9uZShzdHJ1 Y3Qgem9uZSAqem9uZSwNCiAgICAgICAgLyogQWNjb3VudCBmb3IgdGhlIG51bWJlciBvZiBwYWdl cyBhdHRlbXB0ZWQgdG8gcmVjbGFpbSAqLw0KICAgICAgICAqbnJfYXR0ZW1wdGVkICs9IHNjLT5u cl90b19yZWNsYWltOw0KDQotICAgICAgIGlmIChucl9zbGFiID09IDAgJiYgIXpvbmVfcmVjbGFp bWFibGUoem9uZSkpDQorICAgICAgIGlmIChzYy0+bnJfcmVjbGFpbWVkID09IDAgJiYgIXpvbmVf cmVjbGFpbWFibGUoem9uZSkpDQogICAgICAgICAgICAgICAgem9uZS0+YWxsX3VucmVjbGFpbWFi bGUgPSAxOw0KDQogICAgICAgIHpvbmVfY2xlYXJfZmxhZyh6b25lLCBaT05FX1dSSVRFQkFDSyk7 DQoNCg0KSSB0aGluayB0aGUgY3VycmVudCBjaGVjayBpcyB3cm9uZywgcmVjbGFpbWVkIGEgc2xh YiBkb2Vzbid0IG1lYW4NCnJlY2xhaW1lZCBhIHBhZ2UuDQoNCi0tIA0KUmVnYXJkcywNCi0tQm9i DQo= -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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