From mboxrd@z Thu Jan 1 00:00:00 1970 From: majianpeng Subject: Re: Re: [patch 03/10 v3] raid5: add a per-stripe lock Date: Tue, 3 Jul 2012 20:16:31 +0800 Message-ID: <201207032016270001820@gmail.com> References: <20120625072447.268095276@kernel.org> <20120625072613.620625574@kernel.org> <20120702105046.56cd47ec@notabene.brown> <20120702031626.GE29770@kernel.org>, <20120702173953.7bee26cb@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 Return-path: Sender: linux-raid-owner@vger.kernel.org To: Neil Brown , shli Cc: linux-raid , axboe , Dan Williams List-Id: linux-raid.ids T24gMjAxMi0wNy0wMiAxNTozOSBOZWlsQnJvd24gPG5laWxiQHN1c2UuZGU+IFdyb3RlOg0KPk9u IE1vbiwgMiBKdWwgMjAxMiAxMToxNjoyNiArMDgwMCBTaGFvaHVhIExpIDxzaGxpQGtlcm5lbC5v cmc+IHdyb3RlOg0KPg0KPg0KPj4gPiBUaGVuIEkgY291bGQgc2VlIHdoYXQgaXMgYmVpbmcgYWRk ZWQgYW5kIHdoYXQgaXMgYmVpbmcgcmVtb3ZlZCBhbGwgaW4gdGhlIG9uZQ0KPj4gPiBwYXRjaCBh bmQgSSBjYW4gYmUgc3VyZSB0aGF0IHRoZXkgYmFsYW5jZS4NCj4+IA0KPj4gcmV3b3JrZWQgdGhl IHBhdGNoIDMtNSB0byB0d28gcGF0Y2hlcyBhcyB5b3Ugc3VnZ2VzdGVkLCBhbmQgc2VudCB0byB5 b3UuIHBsZWFzZSBjaGVjay4NCj4NCj5UaGFua3MuICBUaGF0J3MgbG9va2luZyByZWFsbHkgZ29v ZC4NCj4NCj5Ib3dldmVyIEkgdGhpbmsgd2UgY2FuIGRvIGJldHRlci4gIEkndmUgYmVlbiBsb29r aW5nIG1vcmUgY2xvc2VseSBhdCB0aGUgY29kZQ0KPmFuZCBJIHRoaW5rIHRoYXQgdGhlIG9ubHkg dGhpbmdzIHRoYXQgd2UgbmVlZCBzdHJpcGVfbG9jayB0byBwcm90ZWN0IGFyZQ0KPi0+dG9yZWFk IGFuZCAtPnRvd3JpdGUsIHRvZ2V0aGVyIHdpdGggdGhlIGZvbGxvd2luZyBiaW9zLiAgZS5nLg0K Pi0+dG9yZWFkLT5iaV9uZXh0IGV0Yy4NCj4NCj4tPnJlYWQgYW5kIC0+d3JpdHRlbiBkb24ndCBu ZWVkIHN0cmlwZV9sb2NrIHByb3RlY3Rpb24sIGFzIHRoZXkgYXJlIG9ubHkNCj5tYW5pcHVsYXRl ZCBieSB0aGUgaGFuZGxlX3N0cmlwZSBzdGF0ZSBtYWNoaW5lIHdoaWNoIHVzZXMgU1RSSVBFX0FD VElWRSANCj5hbmQgcmVmY291bnRzIGZvciBleGNsdXNpb24uDQo+DQo+U28gYWRkX3N0cmlwZV9i aW8gbmVlZCB0byB0YWtlIHRoZSBsb2NrIHdoaWxlIGFkZGluZyBhIGJpbyB0byB0aGUNCj4tPnRv cmVhZCBhbmQgIC0+dG93cml0ZSBsaXN0cywgYW5kIG9wc19ydW5fYmlvZHJhaW4oKSBhbmQgb3Bz X3J1bl9iaW9maWxsDQo+bmVlZCB0byB0YWtlIHRoZSBsb2NrIHdoaWxlIHRoZSBtb3ZlIHRoZSBs aXN0IGZyb20gLT50b3tyZWFkLHdyaXRlfSB0bw0KPi0+e3JlYWQsd3JpdHRlbn0uICANCkhvdyBh Ym91dCB4Y2hnKCk/DQo+QnV0IHdlIGRvbid0IG5lZWQgaXQgYW55d2hlcmUgZWxzZS4gIGUuZy4g YW5hbHlzZV9zdHJpcGUNCj5zaG91bGRuJ3QgbmVlZCB0aGUgbG9jayBhdCBhbGwuICBBbnkgY2hh bmdlIHRoYXQgY291bGQgaGFwcGVuIGR1cmluZyB0aGUgbG9vcA0KPmNvdWxkIGVxdWFsbHkgaGFw cGVuIGFmdGVyIHRoZSBsb2NrIHdhcyByZWxlYXNlZCBzbyB3ZSBkb24ndCBsb3NlIGJ5IG5vdA0K PmhhdmluZyB0aGUgbG9jay4NCj4NCj5UaGVyZSBpcyBhbm90aGVyIGN1cnJlbnQgdXNlciBvZiB0 aGUgbG9jaywgYnV0IEkgdGhpbmsgdGhhdCBzaG91bGQgYmUNCj5kaXNjYXJkZWQgYXMgYSBmYWxz ZSBvcHRpbWlzYXRpb24uDQo+V2UgY3VycmVudGx5IHRyeSB0byBvcHRpbWlzZSBvdXQgZXh0cmEg Y2FsbHMgdG8gYml0bWFwX3N0YXJ0d3JpdGUgYW5kDQo+Yml0bWFwX2VuZHdyaXRlIHdoZW4gd2Ug c2VlIGJhY2stdG8tYmFjayB3cml0ZXMgdG8gdGhlIG9uZSBzdHJpcGUuICBIb3dldmVyIEkNCj5z dXNwZWN0IHRoYXQgaXMgZXh0cmVtZWx5IHVubGlrZWx5IGFuZCBpdCBqdXN0IGltcG9zZXMgYW5k IHBvaW50bGVzcyBuZWVkIGZvcg0KPnN5bmNocm9uaXNhdGlvbiBpbiByYWlkNS4NCj4NCj5XZSBq dXN0IHNpbXBseSBjYWxsIGJpdG1hcF9zdGFydHdyaXRlIHdoZW5ldmVyIC0+dG93cml0ZSBjaGFu Z2VzIGZyb20gTlVMTCB0bw0KPm5vbi1OVUxMLCBhbmQgY2FsbCBiaXRtYXBfZW5kd3JpdGUgd2hl bmV2ZXIgd2UgY2xlYXIgLT53cml0dGVuLCByZWd1YXJkbGVzcw0KPndoYXQgdmFsdWUgLT50b3dy aXRlIG5vdyBoYXMuDQo+DQo+V291bGQgeW91IGxpa2UgdG8gZXhwZXJpbWVudCB3aXRoIHRoYXQ/ ICBJZiBJIGhhdmVuJ3QgZGVzY3JpYmVkIGl0IHdlbGwNCj5lbm91Z2ggSSBjYW4gd3JpdGUgYSBw YXRjaCB0byBzaG93IHdoYXQgSSBtZWFuLg0KPg0KPlRoYW5rcywNCj5OZWlsQnJvd24NCj4=