From mboxrd@z Thu Jan 1 00:00:00 1970 From: majianpeng Subject: [PATCH] ceph: fix sync read eof check deadlock Date: Mon, 23 Sep 2013 09:39:23 +0800 Message-ID: <201309230939212660680@gmail.com> Reply-To: majianpeng Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: base64 Return-path: Received: from mail-pd0-f182.google.com ([209.85.192.182]:58979 "EHLO mail-pd0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752880Ab3IWBj2 (ORCPT ); Sun, 22 Sep 2013 21:39:28 -0400 Received: by mail-pd0-f182.google.com with SMTP id r10so2614022pdi.27 for ; Sun, 22 Sep 2013 18:39:27 -0700 (PDT) Sender: ceph-devel-owner@vger.kernel.org List-ID: To: sage Cc: =?us-ascii?B?WWFuLCBaaGVuZw==?= , ceph-devel QXMgWWFuLFpoZW5nIHNhaWQsIGNvbW1pdCAwOTEzNDQ0MjA4ZGIgaW50cnVvZHVjZSBhIGJ1Zzoi Z2V0YXR0ciBuZWVkIHRvDQoicmVhZCBsb2NrIiBpbm9kZSdzIGZpbGVsb2NrLiBCdXQgdGhlIGxv Y2sgY2FuIGJlIGluIHVuc3RhYmxlIHN0YXRlLg0KdGhlIGdldGF0dHIgcmVxdWVzdCB3YWl0cyBm b3IgbG9jaydzIHN0YXRlIHRvIGJlY29tZSBzdGFibGUsIHRoZSBsb2NrDQp3YWl0cyBmb3IgY2xp ZW50IHRvIHJlbGVhc2UgRnIgY2FwLiINCg0KQ29tbWl0IDZhMDI2NTg5YmEzMzMxODVjNDY2Yzkw IHJlc29sdmVkIHRoZSBzYW1lIGJ1ZyBhbHNvLg0KQmVmb3JlIGRvaW5nIGdldGF0dHIsIGl0IG11 c3QgcHV0IHRoZSBjYXBzIHdoaWNoIGFscmVhZHkgaG9sZCBhdm9pZA0KZGVhZGxvY2suDQoNClJl cG9ydGVkLWJ5OiBZYW4sIFpoZW5nIDx6aGVuZy56LnlhbkBpbnRlbC5jb20+DQpTaWduZWQtb2Zm LWJ5OiBKaWFucGVuZyBNYSA8bWFqaWFucGVuZ0BnbWFpbC5jb20+DQotLS0NCiBmcy9jZXBoL2Zp bGUuYyB8IDI1ICsrKysrKysrKysrKysrKysrKysrLS0tLS0NCiAxIGZpbGUgY2hhbmdlZCwgMjAg aW5zZXJ0aW9ucygrKSwgNSBkZWxldGlvbnMoLSkNCg0KZGlmZiAtLWdpdCBhL2ZzL2NlcGgvZmls ZS5jIGIvZnMvY2VwaC9maWxlLmMNCmluZGV4IDdkYTM1YzcuLmJjMDBhY2UgMTAwNjQ0DQotLS0g YS9mcy9jZXBoL2ZpbGUuYw0KKysrIGIvZnMvY2VwaC9maWxlLmMNCkBAIC04MzksNyArODM5LDE1 IEBAIGFnYWluOg0KIAkJcmV0ID0gY2VwaF9zeW5jX3JlYWQoaW9jYiwgJmksICZjaGVja2VvZik7 DQogDQogCQlpZiAoY2hlY2tlb2YgJiYgcmV0ID49IDApIHsNCi0JCQlpbnQgc3RhdHJldCA9IGNl cGhfZG9fZ2V0YXR0cihpbm9kZSwNCisJCQlpbnQgc3RhdHJldDsNCisJCQkvKg0KKwkJCSAqQmVm b3JlIGdldGF0dHIsaXQgc2hvdWxkIHB1dCBjYXBzIGF2b2lkDQorCQkJICpkZWFkbG9jay4NCisJ CQkgKi8NCisJCQljZXBoX3B1dF9jYXBfcmVmcyhjaSwgZ290KTsNCisJCQlnb3QgPSAwOw0KKw0K KwkJCXN0YXRyZXQgPSBjZXBoX2RvX2dldGF0dHIoaW5vZGUsDQogCQkJCQkJICAgICAgQ0VQSF9T VEFUX0NBUF9TSVpFKTsNCiANCiAJCQkvKiBoaXQgRU9GIG9yIGhvbGU/ICovDQpAQCAtODUxLDE2 ICs4NTksMjMgQEAgYWdhaW46DQogDQogCQkJCXJlYWQgKz0gcmV0Ow0KIAkJCQljaGVja2VvZiA9 IDA7DQotCQkJCWdvdG8gYWdhaW47DQorCQkJCXJldCA9IGNlcGhfZ2V0X2NhcHMoY2ksIENFUEhf Q0FQX0ZJTEVfUkQsDQorCQkJCQkJCXdhbnQsICZnb3QsIC0xKTsNCisJCQkJaWYgKHJldCA8IDAp DQorCQkJCQlyZXQgPSAwOw0KKwkJCQllbHNlDQorCQkJCQlnb3RvIGFnYWluOw0KIAkJCX0NCiAJ CX0NCiANCiAJfSBlbHNlDQogCQlyZXQgPSBnZW5lcmljX2ZpbGVfYWlvX3JlYWQoaW9jYiwgaW92 LCBucl9zZWdzLCBwb3MpOw0KIA0KLQlkb3V0KCJhaW9fcmVhZCAlcCAlbGx4LiVsbHggZHJvcHBp bmcgY2FwIHJlZnMgb24gJXMgPSAlZFxuIiwNCi0JICAgICBpbm9kZSwgY2VwaF92aW5vcChpbm9k ZSksIGNlcGhfY2FwX3N0cmluZyhnb3QpLCAoaW50KXJldCk7DQotCWNlcGhfcHV0X2NhcF9yZWZz KGNpLCBnb3QpOw0KKwlpZiAoZ290KSB7DQorCQlkb3V0KCJhaW9fcmVhZCAlcCAlbGx4LiVsbHgg ZHJvcHBpbmcgY2FwIHJlZnMgb24gJXMgPSAlZFxuIiwNCisJCSAgICAgaW5vZGUsIGNlcGhfdmlu b3AoaW5vZGUpLCBjZXBoX2NhcF9zdHJpbmcoZ290KSwgKGludClyZXQpOw0KKwkJY2VwaF9wdXRf Y2FwX3JlZnMoY2ksIGdvdCk7DQorCX0NCiANCiAJaWYgKHJldCA+PSAwKQ0KIAkJcmV0ICs9IHJl YWQ7DQotLSANCjEuOC40LXJjMA0K