From mboxrd@z Thu Jan 1 00:00:00 1970 From: majianpeng Subject: Re: Re: question about striped_read Date: Fri, 26 Jul 2013 09:38:14 +0800 Message-ID: <201307260938095935695@gmail.com> References: <201307250852310158703@gmail.com> <201307251455102701172@gmail.com> <201307260848241340451@gmail.com> <201307260922285205344@gmail.com>, Reply-To: majianpeng Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 Return-path: Received: from mail-pd0-f177.google.com ([209.85.192.177]:57165 "EHLO mail-pd0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756215Ab3GZBiT (ORCPT ); Thu, 25 Jul 2013 21:38:19 -0400 Received: by mail-pd0-f177.google.com with SMTP id u11so2329887pdi.36 for ; Thu, 25 Jul 2013 18:38:19 -0700 (PDT) Sender: ceph-devel-owner@vger.kernel.org List-ID: To: =?gb2312?B?WWFuLCBaaGVuZw==?= Cc: sage , ceph-devel Pk9uIEZyaSwgSnVsIDI2LCAyMDEzIGF0IDk6MjIgQU0sIG1hamlhbnBlbmcgPG1hamlhbnBlbmdA Z21haWwuY29tPiB3cm90ZToNCj4+Pk9uIEZyaSwgSnVsIDI2LCAyMDEzIGF0IDg6NDggQU0sIG1h amlhbnBlbmcgPG1hamlhbnBlbmdAZ21haWwuY29tPiB3cm90ZToNCj4+Pj4+T24gVGh1LCAyNSBK dWwgMjAxMywgWWFuLCBaaGVuZyB3cm90ZToNCj4+Pj4+PiBPbiBUaHUsIEp1bCAyNSwgMjAxMyBh dCAyOjU1IFBNLCBtYWppYW5wZW5nIDxtYWppYW5wZW5nQGdtYWlsLmNvbT4gd3JvdGU6DQo+Pj4+ Pj4gPj5PbiBUaHUsIDI1IEp1bCAyMDEzLCBtYWppYW5wZW5nIHdyb3RlOg0KPj4+Pj4+ID4+PiBI aSBhbGwsDQo+Pj4+Pj4gPj4+ICAgICAgSSBtZXQgYSBwcm9ibGVtIGFuZCBhc2sgc29tZWJvZHkg Y291bGQgaGVscCBtZS4NCj4+Pj4+PiA+Pj4gSW4gZnVuYyBzdHJpcGVkX3JlYWQoKQ0KPj4+Pj4+ ID4+PiA+IGlmIChyZXQgPiAwKSB7DQo+Pj4+Pj4gPj4+ID4gICAgICAgICAgICAgICAgaW50IGRp ZHBhZ2VzID0gKHBhZ2VfYWxpZ24gKyByZXQpID4+IFBBR0VfQ0FDSEVfU0hJRlQ7DQo+Pj4+Pj4g Pj4+DQo+Pj4+Pj4gPj4+ID4gICAgICAgICAgICAgICAgaWYgKHJlYWQgPCBwb3MgLSBvZmYpIHsN Cj4+Pj4+PiA+Pj4gPiAgICAgICAgICAgICAgICAgICAgICAgZG91dCgiIHplcm8gZ2FwICVsbHUg dG8gJWxsdVxuIiwgb2ZmICsgcmVhZCwgcG9zKTsNCj4+Pj4+PiA+Pj4gPiAgICAgICAgICAgICAg ICAgICAgICAgIGNlcGhfemVyb19wYWdlX3ZlY3Rvcl9yYW5nZShwYWdlX2FsaWduICsgcmVhZCwN Cj4+Pj4+PiA+Pj4gPiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICBwb3MgLSBvZmYgLSByZWFkLCBwYWdlcyk7DQo+Pj4+Pj4gPj4+ID4gICAgICAgICAg ICAgICAgfQ0KPj4+Pj4+ID4+PiA+ICAgICAgICAgICAgICAgIHBvcyArPSByZXQ7DQo+Pj4+Pj4N Cj4+Pj4+PiBJIHRoaW5rIHlvdSBhcmUgcmlnaHQuIHByb2JhYmx5IGFib3ZlIGxpbmUgc2hvdWxk IGJlICdwb3MgKz0gdGhpc19sZW4nDQo+Pj4+Pg0KPj4+Pj5JdCBzaG91bGQgYmUgZWFzeSB0byBj b25zdHJ1Y3QgYSBzaW1wbGUgdGVzdCBmb3IgdGhpcy4gIEUuZy4sIHNvbWV0aGluZw0KPj4+Pj5s aWtlDQo+Pj4+Pg0KPj4+Pj4gcHdyaXRlKGZkLCBidWYsIDAsIDMwMDAwMDApOw0KPj4+Pj4gcHdy aXRlKGZkLCBidWYsIDQxOTQzMDQsIDEwMDApOw0KPj4+Pj4gcHJlYWQoZmQsIGJ1ZiwgMCwgNjAw MDAwMCk7DQo+Pj4+PiAuLi4NCj4+Pj4+DQo+Pj4+PmFuZCB3aGF0ZXZlciBlbHNlIHRvIHZlcmlm eSB0aGF0IHBvcyB3YXMgaW4gZmFjdCBhZHZhbmNlZCBwcm9wZXJseT8NCj4+Pj4+DQo+Pj4+IFRo ZSBmb2xsb3dpbmcgaXMgbXkgdGVzdCBjb2RlOg0KPj4+PiB2b2lkIGhvbGVfdGVzdCgpDQo+Pj4+ IHsNCj4+Pj4gICAgICAgICBjaGFyIGJ1Zls0MTk0MzA0XTsNCj4+Pj4gICAgICAgICBzc2l6ZV90 IHJldDsNCj4+Pj4gICAgICAgICBpbnQgZmQgPSBvcGVuKCIvbWVkaWEvY2VwaC90ZXN0IiwgT19S RFdSfE9fQ1JFQVR8T19ESVJFQ1R8T19UUlVOQyk7DQo+Pj4+ICAgICAgICAgaWYgKGZkIDwgMCkg ew0KPj4+PiAgICAgICAgICAgICAgICAgcHJpbnRmKCJvcGVuIGVycm9yICVzXG4iLCBzdHJlcnJv cihlcnJubykpOw0KPj4+PiAgICAgICAgICAgICAgICAgcmV0dXJuOw0KPj4+PiAgICAgICAgIH0N Cj4+Pj4NCj4+Pj4gICAgICAgICByZXQgPSBwd3JpdGUoZmQsIGJ1ZiwgMCwgMzAwMDAwMCk7DQo+ Pj4+ICAgICAgICAgcmV0ID0gcHdyaXRlKGZkLCBidWYsIDQxOTQzMDQsIDEwMDApOw0KPj4+PiAg ICAgICAgIHJldCA9IHByZWFkKGZkLCBidWYgLCAwLCA2MDAwMDAwKTsNCj4+Pj4gICAgICAgICBj bG9zZShmZCk7DQo+Pj4+IH0NCj4+Pj4NCj4+Pj4gVGhlIGRlYnVnIG1lc3NhZ2UgZnJvbSBzdHJp cGVkX3JlYWQgYXJlOg0KPj4+PiBbICAyNjcuNTMwMjY2XSBjZXBoOiAgICAgICAgICAgZmlsZS5j OjM1NiAgOiBzdHJpcGVkX3JlYWQgNjAwMDAwMH4wIChyZWFkIDApIGdvdCAwDQo+Pj4+IFsgIDI2 Ny41MzAyNzBdIGNlcGg6ICAgICAgICAgICBmaWxlLmM6Mzk2ICA6IHN0cmlwZWRfcmVhZCByZXR1 cm5zIDANCj4+Pj4NCj4+Pj4gVGhlIHJlc3VsdCBpc24ndCB3aGF0J3MgeW91ciBzYWlkLg0KPj4+ PiBBbSBpIG1pc3Npbmcgc29tZXRoaW5nPw0KPj4+Pg0KPj4+PiBCVFcsIGkgdGhpbmsgWWFuIGlz IG9rLA0KPj4+PiBUaGUgY29kZQ0KPj4+PiBwb3MgKz0gcmV0OyBzaG91bGQgcG9zICs9IHRoaXNf bGVuLg0KPj4+PiBCZWNhdXNlIHRoaXNfbGVuIGNhbiBsYXJnZXIgdGhhbiByZXQuDQo+Pj4+IEJ1 dCB0aGUgcXVlc3Rpb24gaXMgd2hhdCdzIGNvbmRpdGlvbiBjYW4gY2F1c2UgdGhpcz8NCj4+Pg0K Pj4+YnkgZGVmYXVsdCwgY2VwaCBzdHJpcHMgZmlsZSB0byA0TSBvYmplY3RzLiBJbiBhYm92ZSBl eGFtcGxlLCB0aGUNCj4+PmZpcnN0IG9iamVjdCBvbmx5IGhhcw0KPj4+M00gZGF0YSwgc28gJ3Jl dCA9IDNNJyAgYW5kICd0aGlzX2xlbiA9IDRNJw0KPj4gYWN0dWFsbHksIGluIGZ1bmMgY2FsY19s YXlvdXQ6IHRoZSByZWFkIGxlbmd0aCBpcyB0aGUgc21hbGxlciBiZXR3ZWVuIG9iamVjdCBhbmQg bGVmdC4NCj4+Pg0KPj4+PiBBbmQgY2FuIHRoZSBzaG9ydF9yZWFkIG9wZXJhdGlvbiBoYW5kbGUg dGhpcyBzaXR1YXRpb24/DQo+Pj4NCj4+PkkgZG9uJ3QgdGhpbmsgaXQncyBnb29kIGlkZWEgdG8g c2hvcnQgcmVhZCB1bmxlc3Mgd2UgcmVhbGx5IHJlYWNoIEVPRi4NCj4+IENhbiB5b3UgZXhwbGFp biBpbiBkZXRhaWw/DQo+Pg0KPg0KPmJlY2F1c2Ugc29tZSB1c2VyIHByb2dyYW0gaW50ZXJwcmV0 IHNob3J0IHJlYWQgYXMgRU9GIHJlYWNoZWQuIElmIHdlDQo+cmV0dXJuIHNob3J0DQo+cmVhZCB0 aGV5IGdldCBjb25mdXNlZC4NClRoZSByZWFzb24gY2F1c2Ugc2hvcnQtcmVhZCBpcyBvbmx5IEVP Rj8gb3Igb3RoZXIgcmVhc29uPw0KDQo+DQo+UmVnYXJkcw0KPllhbiwgWmhlbmc=