From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jianpeng Ma" Subject: Re: Re: [patch]raid5: fix directio regression Date: Tue, 7 Aug 2012 13:42:40 +0800 Message-ID: <201208071342361877406@gmail.com> References: <20120807032240.GA22495@kernel.org> <201208071312593120932@gmail.com>, Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 Return-path: Sender: linux-raid-owner@vger.kernel.org To: shli Cc: linux-raid , Neil Brown List-Id: linux-raid.ids T24gMjAxMi0wOC0wNyAxMzozMiBTaGFvaHVhIExpIDxzaGxpQGtlcm5lbC5vcmc+IFdyb3RlOg0K PjIwMTIvOC83IEppYW5wZW5nIE1hIDxtYWppYW5wZW5nQGdtYWlsLmNvbT46DQo+PiBPbiAyMDEy LTA4LTA3IDExOjIyIFNoYW9odWEgTGkgPHNobGlAa2VybmVsLm9yZz4gV3JvdGU6DQo+Pj5NeSBk aXJlY3RJTyByYW5kb213cml0ZSA0ayB3b3JrbG9hZCBzaG93cyBhIDEwfjIwJSByZWdyZXNzaW9u IGNhdXNlZCBieSBjb21taXQNCj4+Pjg5NWUzYzVjNThhODBiYi4gZGlyZWN0SU8gdXN1YWxseSBp cyByYW5kb20gSU8gYW5kIGlmIHJlcXVlc3Qgc2l6ZSBpc24ndCBiaWcNCj4+Pih3aGljaCBpcyB0 aGUgY29tbW9uIGNhc2UpLCBkZWxheSBoYW5kbGluZyBvZiB0aGUgc3RyaXBlIGhhc24ndCBhbnkg YWR2YW50YWdlcy4NCj4+PkZvciBiaWcgc2l6ZSByZXF1ZXN0LCBkZWxheSBjYW4gc3RpbGwgcmVk dWNlIElPLg0KPj4+DQo+Pj5TaWduZWQtb2ZmLWJ5OiBTaGFvaHVhIExpIDxzaGxpQGZ1c2lvbmlv LmNvbT4NCj4+Pi0tLQ0KPj4+IGRyaXZlcnMvbWQvcmFpZDUuYyB8ICAgIDkgKysrKysrKystDQo+ Pj4gMSBmaWxlIGNoYW5nZWQsIDggaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlvbigtKQ0KW3NuaXBd DQo+Pj4tLQ0KPj4gTWF5IGJlIHVzZWQgc2l6ZSB0byBqdWRnZSBpcyBub3QgYSBnb29kIG1ldGhv ZC4NCj4+IEkgZmlyc3RseSBzZW5kZWQgdGhpcyBwYXRjaCwgb25seSB3YW50IHRvIGNvbnRyb2wg ZGlyZWN0LXdyaXRlLWJsb2NrLG5vdCBmb3IgcmVxdWxhciBmaWxlLg0KPj4gQmVjYXVzZSBpIHRo aW5rIGlmIHNvbWVvbmUgdXNlZCBkaXJlY3Qtd3JpdGUtYmxvY2sgZm9yIHJhaWQ1LGhlIHNob3Vs ZCBrbm93IHRoZSBmZWF0dXJlIG9mIHJhaWQ1IGFuZCBoZSBjYW4gY29udHJvbA0KPj4gZm9yIHdy aXRlIHRvIGZ1bGwtd3JpdGUuDQo+PiBCdXQgYXQgdGhhdCB0aW1lLCBpIGRpZCBrbm93IGhvdyB0 byBkaWZmZXJlbnRpYXRlIGJldHdlZW4gcmVndWxhciBmaWxlIGFuZCBibG9jay1kZXZpY2UuDQo+ PiBJIHRoaWsgd2Ugc2hvdWxkIGRvIHNvbWV0aGluZyB0byBkbyB0aGlzLg0KPg0KPkkgZG9uJ3Qg dGhpbmsgaXQncyBwb3NzaWJsZSB1c2VyIGNhbiBjb250cm9sIGhpcyB3cml0ZSB0byBiZSBhDQo+ ZnVsbC13cml0ZSBldmVuIGZvcg0KPnJhdyBkaXNrIElPLiBXaHkgcmVndWxhciBmaWxlIGFuZCBi bG9jayBkZXZpY2UgaW8gbWF0dGVycyBoZXJlPw0KPg0KPlRoYW5rcywNCj5TaGFvaHVhDQoNClRo ZSBwcm9ibGVtIGlzIHdoZW4gdG8gc2V0IGZsYWcgU1RSSVBFX1BSRVJFQURfQUNUSVZFLg0KV2hl biBzZXR0aW5nIHRoaXMgZmxhZywgaXQgd2lsbCB0byBoYW5kbGUgc3RyaXBlIGluc3RlYWQgb2Yg ZGVsYXlpbmcgZm9yIGZ1bGwtd3JpdGUuDQpJIHRoaW5rIGl0IGxpa2UgdGhlIElPUFMgYW5kIHRo cm91Z2hwdXQuDQpXaGVuIGluIHJhbmRvbS1zbWFsbC13cml0ZSB3b3JrbG9hZCwgaXQndCBoYXJk bHkgdG8gYWNoaWV2ZSBmdWxsLXdyaXRlLlNvIG5vIG5lZWQgdG8gZGVhbHkuVGhpcyBsaWtlIHN5 bmMtd3JpdGUuDQpCdXQgZm9yIGxhcmdlci13cml0ZSB3b3JrbG9hZCwgaXQncyBlYXNseSB0byBh Y2hpZXZlIGZ1bGwtd3JpdGUuDQpUaGlzIGlzIHdoeSBzZW5kIHRoZSBwYXRoLiBNeSB3b3JrbG9h ZCBpcyB0aGUgbGF0dGVyLg0KRm9yIHJlZ3VsYXIgZmlsZSwgaXQgY29udHJvbGVkIGJ5IGZzLkJ1 dCBmb3IgcmF3LWJsb2NrLGkgdGhpbmsgd2UgZG8gdGhlIHdvcmsgYnkgZnMsIHNvIHdlIGNhbiBj b250cm9sIHRvIGRvIHRoZSBiZXN0IHBlcmZvcm1hbmNlLg0KT2YgY291cmNlLCBNeSB3b3JrIGlz IGRvIHRoaXMsc28gbXkgcG9pbnQgbWF5IGJlIGxpbWl0ZWQu