From: EUNBONG SONG Subject: Question about ext4 excessive stall time Date: Wed, 15 May 2013 07:15:01 +0000 (GMT) Message-ID: <26998592.95551368602101253.JavaMail.weblogic@epml08> Reply-To: eunb.song@samsung.com Mime-Version: 1.0 Content-Type: text/plain; charset=euc-kr Content-Transfer-Encoding: base64 Cc: "linux-kernel@vger.kernel.org" , "tytso@mit.edu" , jack@suse.cz, dmonakhov@openvz.org, gnehzuil.liu@gmail.com To: "linux-ext4@vger.kernel.org" Return-path: Received: from mailout4.samsung.com ([203.254.224.34]:51727 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752002Ab3EOHPD (ORCPT ); Wed, 15 May 2013 03:15:03 -0400 Received: from epcpsbgr1.samsung.com (u141.gpu120.samsung.co.kr [203.254.230.141]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MMT00H10W4W0LS0@mailout4.samsung.com> for linux-ext4@vger.kernel.org; Wed, 15 May 2013 16:15:01 +0900 (KST) MIME-version: 1.0 Sender: linux-ext4-owner@vger.kernel.org List-ID: DQpIZWxsby4gDQpJIHNhdyBzb21lIGNvbW1pdCBtZXNzYWdlcyBhYm91dCBleGNlc3NpdmUgc3Rh bGwgdGltZXMgaW4gZXh0NC4gDQpUaGUgc2FtZSBwcm9ibGVtIHdhcyByZXByb2R1Y2VkIGluIG15 IGJvYXJkLiBBY3R1YWxseSwgaSdtIG5vdCBzdXJlIHRoYXQgaXMgdGhlIHNhbWUgcHJvYmxlbS4N CkJ1dCB0aGUgY2FsbHRyYWNlIG1lc3NhZ2UgaXMgdmVyeSBzaW1pbGFyIHdpdGggY29tbWl0IGlk OiBmNzgzZjA5MS4gDQoNCk15IGJvYXJkIGNvbmZpZ3VyYXRpb24gYXMgZm9sbG93Lg0KTGludXg6 IDIuNi4zMi42MA0KQ1BVOiA4Q1BVDQpEaXNrOiBTU0QNCkZpbGUgc3lzdGVtOiBleHQ0DQoNCkkg a25vdyBteSBrZXJuZWwgdmVyc2lvbiBpcyBzbyBvbGQuIEkganVzdCB3YW50IHRvIGtub3cgd2h5 IHRoaXMgcHJvYmxlbSBpcyBoYXBwZW5lZC4NCkJlY2F1c2Ugb2YgbXkga2VybmVsIHZlcnNpb24g aXMgb2xkPyBvciBCZWNhdXNlIG9mIGRpc2sgPywsDQpJZiBhbnlvbmUga25vd3MgYWJvdXQgdGhp cyBwcm9ibGVtLCBDb3VsZCB5b3UgaGVscCBtZT8NCg0KQXMgaSBzYWlkLCAgdGhlIGNhbGx0cmFj ZSBtZXNzYWdlIGlzIHZlcnkgc2ltaWxhciB3aXRoIGNvbW1pdCBpZDogZjc4M2YwOTEgYXMgYmVs b3cuDQpCZWNhdXNlIGkgZW5hYmxlZCBodW5ndGFzayBkZXRlY3Rpb24gYW5kIHNldCB0aGUgaHVu Z3Rhc2sgdGltZW91dCB0byAxMjAgc2Vjb25kcy4gDQp0aGUgY2FsbHRyYWNlIG1lc3NhZ2VzIHdl cmUgcHJpbnRlZCBieSB0aGlzLiANCg0KWyAgMjYyLjQ1NTYxNV0gSU5GTzogdGFzayBzd206MTY5 MiBibG9ja2VkIGZvciBtb3JlIHRoYW4gMTIwIHNlY29uZHMuDQpbICAyNjIuNDYxNzE1XSBTdGFj ayA6IDAwMDAwMDAwMDAwMDAwMDAgZmZmZmZmZmY4MDExZjY4NCAwMDAwMDAwMDAwMDAwMDAwIGE4 MDAwMDAxZjhiMzM5NjANClsgIDI2Mi40Njk0MzhdICAgICAgICAgYTgwMDAwMDFmN2YyY2UzOCAw MDAwMDAwMGZmZmZiNmE5IDAwMDAwMDAwMDAwMDAwMDUgZmZmZmZmZmY4MGVmYTI3MA0KWyAgMjYy LjQ3NzQyNF0gICAgICAgICBhODAwMDAwMWY3ZjJkMGU4IDAwMDAwMDAwMDAwMDAwMjAgMDAwMDAw MDAwMDAwMDAwMCBmZmZmZmZmZjgwZWM2OWEwDQpbICAyNjIuNDg1NzMyXSAgICAgICAgIDAwMDAw MDAxZjkwYTNhNTAgYTgwMDAwMDEwN2M5MzAyMCBhODAwMDAwMWY5MDYyZWI4IGE4MDAwMDAxZjkz MDI5NTANClsgIDI2Mi40OTM3MDhdICAgICAgICAgYTgwMDAwMDFmNTEyMTI4MCBhODAwMDAwMWY5 MGEzODEwIGE4MDAwMDAxZjdlMjAwMDAgMDAwMDAwMDAwMDAwMDAwMA0KWyAgMjYyLjUwMTY3NV0g ICAgICAgICAwMDAwMDAwMDAwMDAwMDA0IGE4MDAwMDAxMDdjOTMwMjAgYTgwMDAwMDFmOGIzMzlj MCBmZmZmZmZmZjgwMTFjZDUwDQpbICAyNjIuNTA5NjYxXSAgICAgICAgIGE4MDAwMDAxZjkwNjJl YjggZmZmZmZmZmY4MDExZjY4NCAwMDAwMDAwMDAwMDAwMDAxIGZmZmZmZmZmODAxMWNlYTgNClsg IDI2Mi41MTc2NDddICAgICAgICAgYTgwMDAwMDFmOTMwMjk1MCBmZmZmZmZmZjgwNDI5NWEwIGE4 MDAwMDAxZjkzMDI5NTAgMDAwMDAwMTgwMDAwMDAwMA0KWyAgMjYyLjUyNTY1Ml0gICAgICAgICAw MDAwMDAwMDAwMDAwMDAwIGE4MDAwMDAxZjdmMmNlMzggZmZmZmZmZmY4MDJlM2YwMCBhODAwMDAw MWY0ZjczYmI4DQpbICAyNjIuNTMzNjMxXSAgICAgICAgIGE4MDAwMDAxMDdjOTMwMzggZmZmZmZm ZmY4MDQzOTg3YyAwMDAwMDAwMDAwMDAwMDAwIGE4MDAwMDAxZjkzMDI5NTANClsgIDI2Mi41NDE2 MDNdICAgICAgICAgLi4uDQpbICAyNjIuNTQ0MjA4XSBDYWxsIFRyYWNlOg0KWyAgMjYyLjU0NjY2 OF0gWzxmZmZmZmZmZjgwMTFjNTk4Pl0gX19zY2hlZHVsZV9ub2JrbCsweDI3OC8weDkwMA0KWyAg MjYyLjU1MjM5MV0gWzxmZmZmZmZmZjgwMTFjZDUwPl0gX19zY2hlZHVsZSsweDQ4LzB4ODANClsg IDI2Mi41NTc0MzFdIFs8ZmZmZmZmZmY4MDExY2VhOD5dIHNjaGVkdWxlKzB4MTAvMHgyOA0KWyAg MjYyLjU2MjI2OV0gWzxmZmZmZmZmZjgwNDI5NWEwPl0gZG9fZ2V0X3dyaXRlX2FjY2VzcysweDQ3 MC8weDZhOA0KWyAgMjYyLjU2ODI4NV0gWzxmZmZmZmZmZjgwNDM0NjIwPl0gamJkMl9qb3VybmFs X2dldF93cml0ZV9hY2Nlc3MrMHgzMC8weDU4DQpbICAyNjIuNTc0OTM5XSBbPGZmZmZmZmZmODA0 MTcxYTg+XSBfX2V4dDRfam91cm5hbF9nZXRfd3JpdGVfYWNjZXNzKzB4NDgvMHg4OA0KWyAgMjYy LjU4MTgxN10gWzxmZmZmZmZmZjgwM2ZjMGY4Pl0gZXh0NF9yZXNlcnZlX2lub2RlX3dyaXRlKzB4 ODAvMHhhOA0KWyAgMjYyLjU4ODA1Nl0gWzxmZmZmZmZmZjgwM2ZjMTc0Pl0gZXh0NF9tYXJrX2lu b2RlX2RpcnR5KzB4NTQvMHgxZTgNClsgIDI2Mi41OTQxMjFdIFs8ZmZmZmZmZmY4MDNmYzRhMD5d IGV4dDRfZGlydHlfaW5vZGUrMHgzOC8weDcwDQpbICAyNjIuNTk5NzQ1XSBbPGZmZmZmZmZmODAz ODFhOTg+XSBfX21hcmtfaW5vZGVfZGlydHkrMHg0MC8weDIyOA0KWyAgMjYyLjYwNTQ5M10gWzxm ZmZmZmZmZjgwMzc0N2JjPl0gZmlsZV91cGRhdGVfdGltZSsweGVjLzB4MTkwDQpbICAyNjIuNjEx MTU5XSBbPGZmZmZmZmZmODAzMWNiMjA+XSBfX2dlbmVyaWNfZmlsZV9haW9fd3JpdGUrMHgxZjgv MHgzZTgNClsgIDI2Mi42MTc1NjhdIFs8ZmZmZmZmZmY4MDMxY2Q3MD5dIGdlbmVyaWNfZmlsZV9h aW9fd3JpdGUrMHg2MC8weGMwDQpbICAyNjIuNjIzNjM2XSBbPGZmZmZmZmZmODAzNWMxZjQ+XSBk b19zeW5jX3dyaXRlKzB4YmMvMHgxMjANClsgIDI2Mi42MjkwMzddIFs8ZmZmZmZmZmY4MDM1Y2Uy ND5dIHZmc193cml0ZSsweGI0LzB4MTc4DQpbICAyNjIuNjM0MDQ5XSBbPGZmZmZmZmZmODAzNWNm ZDA+XSBTeVNfd3JpdGUrMHg0OC8weGEwDQpbICAyNjIuNjM5MDIyXSBbPGZmZmZmZmZmODAxMDJm YzQ+XSBoYW5kbGVfc3lzNjQrMHg0NC8weDYwDQpbICAyNjIuNjQ0MjIxXSANCjI2Mi42NDU3MzRd IElORk86IHRhc2sgZXZtOjE4MTQgYmxvY2tlZCBmb3IgbW9yZSB0aGFuIDEyMCBzZWNvbmRzLg0K WyAgMjYyLjY1MTg1NV0gU3RhY2sgOiAwMDAwMDAwMDAwMDAwMDAwIGE4MDAwMDAxZjQ0MmI5MzAg MDAwMDAwMDAwMDAwMDAwMCAwMDAwMDAwMDAwMTAwMTAwDQpbICAyNjIuNjU5NjUxXSAgICAgICAg IGE4MDAwMDAxZjQ0ZmM1YjggMDAwMDAwMDBmZmZmYjRlNiAwMDAwMDAwMDAwMDAwMDAwIGZmZmZm ZmZmODBlZmEyNzANClsgIDI2Mi42Njc2MzddICAgICAgICAgYTgwMDAwMDFmNDRmYzg2OCAwMDAw MDAwMDAwMDAwMDAxIDAwMDAwMDAwMDAwMDAwMDAgZmZmZmZmZmY4MGVjNjlhMA0KWyAgMjYyLjY3 NTY0M10gICAgICAgICBhODAwMDAwMWY1ZGE2M2EwIGE4MDAwMDAxMDdjYTIwMjAgYTgwMDAwMDFm OTIxNDQzOCBhODAwMDAwMWY1ZGE2M2EwDQpbICAyNjIuNjgzNjA4XSAgICAgICAgIGE4MDAwMDAx ZjUxMjEyODAgYTgwMDAwMDFmOTBhMzc5OCBhODAwMDAwMWY3ZTIwMDAwIDAwMDAwMDAwMDAwMDAw MDANClsgIDI2Mi42OTE1OTRdICAgICAgICAgMDAwMDAwMDAwMDAwMDAwNCBhODAwMDAwMTA3Y2Ey MDIwIGE4MDAwMDAxZjQ0MmJhNzAgZmZmZmZmZmY4MDExY2Q1MA0KWyAgMjYyLjY5OTU3OV0gICAg ICAgICBhODAwMDAwMWY5MjE0NDM4IGZmZmZmZmZmODAxMWY2ODQgMDAwMDAwMDAwMDAwMDAwMSBm ZmZmZmZmZjgwMTFjZWE4DQpbICAyNjIuNzA3NTY1XSAgICAgICAgIGE4MDAwMDAxZjVkYTYzYTAg ZmZmZmZmZmY4MDQyOTVhMCBhODAwMDAwMWY1ZGE2M2EwIDAwMDAwMDE4MDAwMDAwMDANClsgIDI2 Mi43MTU1NzZdICAgICAgICAgMDAwMDAwMDAwMDAwMDAwMCBhODAwMDAwMWY0NGZjNWI4IGZmZmZm ZmZmODAyZTNmMDAgYTgwMDAwMDEwN2NhMjAzOA0KWyAgMjYyLjcyMzUzNl0gICAgICAgICBhODAw MDAwMTA3Y2EyMDM4IGZmZmZmZmZmODA0Mzk4N2MgMDAwMDAwMDAwMDAwMDAwMCBhODAwMDAwMWY1 ZGE2M2EwDQpbICAyNjIuNzMxNTIyXSAgICAgICAgIC4uLg0KWyAgMjYyLjczNDEyNl0gQ2FsbCBU cmFjZToNClsgIDI2Mi43MzY1NzhdIFs8ZmZmZmZmZmY4MDExYzU5OD5dIF9fc2NoZWR1bGVfbm9i a2wrMHgyNzgvMHg5MDANClsgIDI2Mi43NDIzMTJdIFs8ZmZmZmZmZmY4MDExY2Q1MD5dIF9fc2No ZWR1bGUrMHg0OC8weDgwDQpbICAyNjIuNzQ3MzczXSBbPGZmZmZmZmZmODAxMWNlYTg+XSBzY2hl ZHVsZSsweDEwLzB4MjgNClsgIDI2Mi43NTIxODVdIFs8ZmZmZmZmZmY4MDQyOTVhMD5dIGRvX2dl dF93cml0ZV9hY2Nlc3MrMHg0NzAvMHg2YTgNClsgIDI2Mi43NTgyMjBdIFs8ZmZmZmZmZmY4MDQz NDYyMD5dIGpiZDJfam91cm5hbF9nZXRfd3JpdGVfYWNjZXNzKzB4MzAvMHg1OA0KWyAgMjYyLjc2 NDg1N10gWzxmZmZmZmZmZjgwNDE3MWE4Pl0gX19leHQ0X2pvdXJuYWxfZ2V0X3dyaXRlX2FjY2Vz cysweDQ4LzB4ODgNClsgIDI2Mi43NzE3MzhdIFs8ZmZmZmZmZmY4MDNmOTRmMD5dIGV4dDRfbmV3 X2lub2RlKzB4MjkwLzB4MTI5OA0KWyAgMjYyLjc3NzM2N10gWzxmZmZmZmZmZjgwNDA2YzQwPl0g ZXh0NF9jcmVhdGUrMHhlOC8weDFlMA0KWyAgMjYyLjc4MjU2Nl0gWzxmZmZmZmZmZjgwMzY3YzU4 Pl0gdmZzX2NyZWF0ZSsweGY4LzB4MTgwDQpbICAyNjIuNzg3NzA1XSBbPGZmZmZmZmZmODAzNmJj Yzg+XSBkb19maWxwX29wZW4rMHhhYjAvMHhiYjANClsgIDI2Mi43OTMwNjldIFs8ZmZmZmZmZmY4 MDM1YTA2MD5dIGRvX3N5c19vcGVuKzB4NzgvMHgxNzANClsgIDI2Mi43OTgyOTNdIFs8ZmZmZmZm ZmY4MDEwMmZjND5dIGhhbmRsZV9zeXM2NCsweDQ0LzB4NjANClsgIDI2Mi44MDM0ODBdIA0KDQpb ICAyNjIuODA0OTg0XSBJTkZPOiB0YXNrIGxvZ3JvdGF0ZToyNDIyIGJsb2NrZWQgZm9yIG1vcmUg dGhhbiAxMjAgc2Vjb25kcy4NClsgIDI2Mi44MTE2NzRdIFN0YWNrIDogMDAwMDAwMDAwMDAwMDAw MCAwMDAwMDAwMDAwMDAwMDAwIDAwMDAwMDAwMDAwMDAwMDAgZmZmZmZmZmY4MDQwZWJiOA0KWyAg MjYyLjgxOTQ1MV0gICAgICAgICBhODAwMDAwMWY0NmI2NzM4IDAwMDAwMDAwZmZmZmFmYWYgMDAw MDAwMDAwMDAwMDAwMCBmZmZmZmZmZjgwZWZhMjcwDQpbICAyNjIuODI3NDM2XSAgICAgICAgIGE4 MDAwMDAxZjQ2YjY5ZTggMDAwMDAwMDAwMDAwMDAwMSAwMDAwMDAwMDAwMDAwMDAwIGZmZmZmZmZm ODBlYzY5YTANClsgIDI2Mi44MzU0MjFdICAgICAgICAgZmZmZmZmZmY4MGVjNmQ0OCBhODAwMDAw MTA3YzkzMDIwIGE4MDAwMDAxZjkwNjJlYjggYTgwMDAwMDFmOTMwMjk1MA0KWyAgMjYyLjg0MzQw N10gICAgICAgICBhODAwMDAwMWY1MTIxMjgwIGE4MDAwMDAxZjkwYTNiYjggYTgwMDAwMDFmN2Uy MDAwMCAwMDAwMDAwMDAwMDAwMDAwDQpbICAyNjIuODUxMzkzXSAgICAgICAgIDAwMDAwMDAwMDAw MDAwMDQgYTgwMDAwMDEwN2M5MzAyMCBhODAwMDAwMWY0ZjczYmEwIGZmZmZmZmZmODAxMWNkNTAN ClsgIDI2Mi44NTkzNzhdICAgICAgICAgYTgwMDAwMDFmOTA2MmViOCBmZmZmZmZmZjgwMTFmNjg0 IDAwMDAwMDAwMDAwMDAwMDEgZmZmZmZmZmY4MDExY2VhOA0KWyAgMjYyLjg2NzM2NF0gICAgICAg ICBhODAwMDAwMWY5MzAyOTUwIGZmZmZmZmZmODA0Mjk1YTAgYTgwMDAwMDFmOTMwMjk1MCAwMDAw MDAxODAwMDAwMDAwDQpbICAyNjIuODc1MzQ5XSAgICAgICAgIDAwMDAwMDAwMDAwMDAwMDAgYTgw MDAwMDFmNDZiNjczOCBmZmZmZmZmZjgwMmUzZjAwIGE4MDAwMDAxMDdjOTMwMzgNClsgIDI2Mi44 ODMzMzVdICAgICAgICAgYTgwMDAwMDFmOGIzMzlkOCBmZmZmZmZmZjgwNDM5ODdjIDAwMDAwMDAw MDAwMDAwMDAgYTgwMDAwMDFmOTMwMjk1MA0KWyAgMjYyLjg5MTMyMV0gICAgICAgICAuLi4NClsg IDI2Mi44OTM5MjVdIENhbGwgVHJhY2U6DQpbICAyNjIuODk2MzgwXSBbPGZmZmZmZmZmODAxMWM1 OTg+XSBfX3NjaGVkdWxlX25vYmtsKzB4Mjc4LzB4OTAwDQpbICAyNjIuOTAyMDg5XSBbPGZmZmZm ZmZmODAxMWNkNTA+XSBfX3NjaGVkdWxlKzB4NDgvMHg4MA0KWyAgMjYyLjkwNzE0M10gWzxmZmZm ZmZmZjgwMTFjZWE4Pl0gc2NoZWR1bGUrMHgxMC8weDI4DQpbICAyNjIuOTExOTg1XSBbPGZmZmZm ZmZmODA0Mjk1YTA+XSBkb19nZXRfd3JpdGVfYWNjZXNzKzB4NDcwLzB4NmE4DQpbICAyNjIuOTE3 OTk0XSBbPGZmZmZmZmZmODA0MzQ2MjA+XSBqYmQyX2pvdXJuYWxfZ2V0X3dyaXRlX2FjY2Vzcysw eDMwLzB4NTgNClsgIDI2Mi45MjQ2NTVdIFs8ZmZmZmZmZmY4MDQxNzFhOD5dIF9fZXh0NF9qb3Vy bmFsX2dldF93cml0ZV9hY2Nlc3MrMHg0OC8weDg4DQpbICAyNjIuOTMxNTM0XSBbPGZmZmZmZmZm ODAzZmMwZjg+XSBleHQ0X3Jlc2VydmVfaW5vZGVfd3JpdGUrMHg4MC8weGE4DQpbICAyNjIuOTM3 Nzc1XSBbPGZmZmZmZmZmODA0MDc1Yzg+XSBleHQ0X29ycGhhbl9hZGQrMHgxMzAvMHgyOTgNClsg IDI2Mi45NDM0MDVdIFs8ZmZmZmZmZmY4MDQwMjdhND5dIGV4dDRfc2V0YXR0cisweDFiYy8weDNl MA0KWyAgMjYyLjk0ODgwNl0gWzxmZmZmZmZmZjgwMzc2Zjc0Pl0gbm90aWZ5X2NoYW5nZSsweDFh NC8weDNhMA0KWyAgMjYyLjk1NDI1NV0gWzxmZmZmZmZmZjgwMzViMTQwPl0gZG9fdHJ1bmNhdGUr MHg1OC8weGE4DQpbICAyNjIuOTU5Mzk3XSBbPGZmZmZmZmZmODAzNWI5Y2M+XSBTeVNfZnRydW5j YXRlKzB4MTA0LzB4MTYwDQpbICAyNjIuOTY0ODQ1XSBbPGZmZmZmZmZmODAxMDJmYzQ+XSBoYW5k bGVfc3lzNjQrMHg0NC8weDYwVGhhbmtzLg0KDQpUaGFua3Mu