From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f199.google.com (mail-ig0-f199.google.com [209.85.213.199]) by kanga.kvack.org (Postfix) with ESMTP id 097B86B0005 for ; Wed, 1 Jun 2016 08:11:49 -0400 (EDT) Received: by mail-ig0-f199.google.com with SMTP id i11so33090385igh.0 for ; Wed, 01 Jun 2016 05:11:49 -0700 (PDT) Received: from smtpbgau1.qq.com (smtpbgau1.qq.com. [54.206.16.166]) by mx.google.com with ESMTPS id z9si10442004pau.40.2016.06.01.05.11.47 for (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 01 Jun 2016 05:11:48 -0700 (PDT) From: "=?utf-8?B?V2FuZyBTaGVuZy1IdWk=?=" Subject: Re: Why __alloc_contig_migrate_range calls migrate_prep() at first? Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_574ED0FD_0B1A79B0_42FD6724" Content-Transfer-Encoding: 8Bit Date: Wed, 1 Jun 2016 20:11:41 +0800 Message-ID: Sender: owner-linux-mm@kvack.org List-ID: To: =?utf-8?B?TWluY2hhbiBLaW0=?= Cc: =?utf-8?B?YWtwbQ==?= , =?utf-8?B?bWdvcm1hbg==?= , =?utf-8?B?aWFtam9vbnNvby5raW0=?= , =?utf-8?B?bGludXgtbW0=?= , =?utf-8?B?Vmxhc3RpbWlsIEJhYmth?= This is a multi-part message in MIME format. ------=_NextPart_574ED0FD_0B1A79B0_42FD6724 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 TWluY2hhbiwNCg0KVGhhdCBzb3VuZHMgZ29vZCB0byBtZS4gDQoNClRoYW5rcywNCldhbmcg U2hlbmctSHVpDQoNCg0KLS0tLS0tLS0tLS0tLS0tLS0tIE9yaWdpbmFsIC0tLS0tLS0tLS0t LS0tLS0tLQ0KRnJvbTogICJNaW5jaGFuIEtpbSI7PG1pbmNoYW5Aa2VybmVsLm9yZz47DQpE YXRlOiAgV2VkLCBKdW4gMSwgMjAxNiAwMzo0MCBQTQ0KVG86ICAiV2FuZyBTaGVuZy1IdWki PHNoaHVpd0Bmb3htYWlsLmNvbT47IA0KQ2M6ICAiYWtwbSI8YWtwbUBsaW51eC1mb3VuZGF0 aW9uLm9yZz47ICJtZ29ybWFuIjxtZ29ybWFuQHRlY2hzaW5ndWxhcml0eS5uZXQ+OyAiaWFt am9vbnNvby5raW0iPGlhbWpvb25zb28ua2ltQGxnZS5jb20+OyAibGludXgtbW0iPGxpbnV4 LW1tQGt2YWNrLm9yZz47ICJWbGFzdGltaWwgQmFia2EiPHZiYWJrYUBzdXNlLmN6PjsgDQpT dWJqZWN0OiAgUmU6IFdoeSBfX2FsbG9jX2NvbnRpZ19taWdyYXRlX3JhbmdlIGNhbGxzICBt aWdyYXRlX3ByZXAoKSBhdCBmaXJzdD8NCg0KDQoNCk9uIFdlZCwgSnVuIDAxLCAyMDE2IGF0 IDExOjQyOjI5QU0gKzA4MDAsIFdhbmcgU2hlbmctSHVpIHdyb3RlOg0KPiBEZWFyLA0KPiAN Cj4gU29ycnkgdG8gdHJvdWJsZSB5b3UuDQo+IA0KPiBJIG5vdGljZWQgY21hX2FsbG9jIHdv dWxkIHR1cm4gdG8gIF9fYWxsb2NfY29udGlnX21pZ3JhdGVfcmFuZ2UgZm9yIGFsbG9jYXRp bmcgcGFnZXMuDQo+IEJ1dCAgX19hbGxvY19jb250aWdfbWlncmF0ZV9yYW5nZSBjYWxscyAg bWlncmF0ZV9wcmVwKCkgYXQgZmlyc3QsIGV2ZW4gaWYgdGhlIHJlcXVlc3RlZCBwYWdlDQo+ IGlzIHNpbmdsZSBhbmQgZnJlZSwgbHJ1X2FkZF9kcmFpbl9hbGwgc3RpbGwgcnVuIChjYWxs ZWQgYnkgIG1pZ3JhdGVfcHJlcCgpKT8NCj4gDQo+IEltYWdlIGEgbGFyZ2UgY2h1bmsgb2Yg ZnJlZSBjb250aWcgcGFnZXMgZm9yIENNQSwgdmFyaW91cyBkcml2ZXJzIG1heSByZXF1ZXN0 IGEgc2luZ2xlIHBhZ2UgZnJvbQ0KPiB0aGUgQ01BIGFyZWEsIHdlJ2xsIGdldCAgbHJ1X2Fk ZF9kcmFpbl9hbGwgcnVuIGZvciBlYWNoIHBhZ2UuDQo+IA0KPiBTaG91bGQgd2UgZGV0ZWN0 IGlmIHRoZSByZXF1aXJlZCBwYWdlcyBhcmUgZnJlZSBiZWZvcmUgbWlncmF0ZV9wcmVwKCks IG9yIGRldGVjdCBhdCBsZWFzdCBmb3Igc2luZ2xlIA0KPiBwYWdlIGFsbG9jYXRpb24/DQoN ClRoYXQgbWFrZXMgc2Vuc2UgdG8gbWUuDQoNCkhvdyBhYm91dCBjYWxsaW5nIG1pZ3JhdGVf cHJlcCBvbmNlIG1pZ3JhdGVfcGFnZXMgZmFpbHMgaW4gdGhlIGZpcnN0IHRyaWFsPw0KDQpk aWZmIC0tZ2l0IGEvbW0vcGFnZV9hbGxvYy5jIGIvbW0vcGFnZV9hbGxvYy5jDQppbmRleCA5 ZDY2NmRmNWVmOTUuLmM1MDRjMWE2MjNkMiAxMDA2NDQNCi0tLSBhL21tL3BhZ2VfYWxsb2Mu Yw0KKysrIGIvbW0vcGFnZV9hbGxvYy5jDQpAQCAtNjYyMyw4ICs2NjIzLDYgQEAgc3RhdGlj IGludCBfX2FsbG9jX2NvbnRpZ19taWdyYXRlX3JhbmdlKHN0cnVjdCBjb21wYWN0X2NvbnRy b2wgKmNjLA0KdW5zaWduZWQgaW50IHRyaWVzID0gMDsNCmludCByZXQgPSAwOw0KDQotIG1p Z3JhdGVfcHJlcCgpOw0KLQ0Kd2hpbGUgKHBmbiA8IGVuZCB8fCAhbGlzdF9lbXB0eSgmY2Mt Pm1pZ3JhdGVwYWdlcykpIHsNCmlmIChmYXRhbF9zaWduYWxfcGVuZGluZyhjdXJyZW50KSkg ew0KcmV0ID0gLUVJTlRSOw0KQEAgLTY2NTAsNiArNjY0OCw4IEBAIHN0YXRpYyBpbnQgX19h bGxvY19jb250aWdfbWlncmF0ZV9yYW5nZShzdHJ1Y3QgY29tcGFjdF9jb250cm9sICpjYywN Cg0KcmV0ID0gbWlncmF0ZV9wYWdlcygmY2MtPm1pZ3JhdGVwYWdlcywgYWxsb2NfbWlncmF0 ZV90YXJnZXQsDQogTlVMTCwgMCwgY2MtPm1vZGUsIE1SX0NNQSk7DQoraWYgKHJldCkNCisg bWlncmF0ZV9wcmVwKCk7DQp9DQppZiAocmV0IDwgMCkgew0KcHV0YmFja19tb3ZhYmxlX3Bh Z2VzKCZjYy0+bWlncmF0ZXBhZ2VzKTsNCg0KDQo+IA0KPiAtLS0tLS0tLS0tLS0tLS0tLS0N Cj4gUmVnYXJkcywNCj4gV2FuZyBTaGVuZy1IdWlO4oC5wqfCssOmw6xywrjigLp6w4fCp3XC qcW+wrLDhiB7wq3igKDDqcOswrnCu8KuJsOe4oCTKcOuw4ZpwqLFvsOYXm7igKFywrbigLDF ocW9xaDDncKiaiTCvcKnJMKiwrjCosK5wqjCrcOowqd+xaAnLinDrsOE ------=_NextPart_574ED0FD_0B1A79B0_42FD6724 Content-Type: text/html; 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