Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757625Ab3CDN5l (ORCPT ); Mon, 4 Mar 2013 08:57:41 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:58057 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756992Ab3CDN5j (ORCPT ); Mon, 4 Mar 2013 08:57:39 -0500 MIME-Version: 1.0 Date: Mon, 4 Mar 2013 21:57:36 +0800 Message-ID: Subject: LOCKDEP: 3.9-rc1: mount.nfs/4272 still has locks held! From: Ming Lei To: Trond Myklebust , "J. Bruce Fields" Cc: Linux Kernel Mailing List , linux-nfs@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3752 Lines: 86 Hi, The below warning can be triggered each time when mount.nfs is running on 3.9-rc1. Not sure if freezable_schedule() inside rpc_wait_bit_killable should be changed to schedule() since nfs_clid_init_mutex is held in the path. [ 41.387939] ===================================== [ 41.392913] [ BUG: mount.nfs/643 still has locks held! ] [ 41.398559] 3.9.0-rc1+ #1740 Not tainted [ 41.402709] ------------------------------------- [ 41.407714] 1 lock held by mount.nfs/643: [ 41.411956] #0: (nfs_clid_init_mutex){+.+...}, at: [] nfs4_discover_server_trunking+0x60/0x1d4 [ 41.422363] [ 41.422363] stack backtrace: [ 41.427032] [] (unwind_backtrace+0x0/0xe0) from [] (rpc_wait_bit_killable+0x38/0xc8) [ 41.437103] [] (rpc_wait_bit_killable+0x38/0xc8) from [] (__wait_on_bit+0x54/0x9c) [ 41.446990] [] (__wait_on_bit+0x54/0x9c) from [] (out_of_line_wait_on_bit+0x78/0x84) [ 41.457061] [] (out_of_line_wait_on_bit+0x78/0x84) from [] (__rpc_execute+0x170/0x348) [ 41.467407] [] (__rpc_execute+0x170/0x348) from [] (rpc_run_task+0x9c/0xa4) [ 41.476715] [] (rpc_run_task+0x9c/0xa4) from [] (rpc_call_sync+0x70/0xb0) [ 41.485778] [] (rpc_call_sync+0x70/0xb0) from [] (nfs4_proc_setclientid+0x1a0/0x1c8) [ 41.495819] [] (nfs4_proc_setclientid+0x1a0/0x1c8) from [] (nfs40_discover_server_trunki ng+0xec/0x148) [ 41.507507] [] (nfs40_discover_server_trunking+0xec/0x148) from [] (nfs4_discover_server _trunking+0x94/0x1d4) [ 41.519866] [] (nfs4_discover_server_trunking+0x94/0x1d4) from [] (nfs4_init_client+0x15 0/0x1b0) [ 41.531036] [] (nfs4_init_client+0x150/0x1b0) from [] (nfs_get_client+0x2cc/0x320) [ 41.540863] [] (nfs_get_client+0x2cc/0x320) from [] (nfs4_set_client+0x80/0xb0) [ 41.550476] [] (nfs4_set_client+0x80/0xb0) from [] (nfs4_create_server+0xb0/0x21c) [ 41.560333] [] (nfs4_create_server+0xb0/0x21c) from [] (nfs4_remote_mount+0x28/0x54) [ 41.570373] [] (nfs4_remote_mount+0x28/0x54) from [] (mount_fs+0x6c/0x160) [ 41.579498] [] (mount_fs+0x6c/0x160) from [] (vfs_kern_mount+0x4c/0xc0) [ 41.588378] [] (vfs_kern_mount+0x4c/0xc0) from [] (nfs_do_root_mount+0x74/0x90) [ 41.597961] [] (nfs_do_root_mount+0x74/0x90) from [] (nfs4_try_mount+0x24/0x3c) [ 41.607513] [] (nfs4_try_mount+0x24/0x3c) from [] (nfs_fs_mount+0x6dc/0x7a0) [ 41.616821] [] (nfs_fs_mount+0x6dc/0x7a0) from [] (mount_fs+0x6c/0x160) [ 41.625701] [] (mount_fs+0x6c/0x160) from [] (vfs_kern_mount+0x4c/0xc0) [ 41.634582] [] (vfs_kern_mount+0x4c/0xc0) from [] (do_mount+0x710/0x81c) [ 41.643524] [] (do_mount+0x710/0x81c) from [] (sys_mount+0x84/0xb8) [ 41.652008] [] (sys_mount+0x84/0xb8) from [] (ret_fast_syscall+0x0/0x48) [ 41.715911] device: '0:28': device_add [ 41.720062] PM: Adding info for No Bus:0:28 [ 41.746887] device: '0:29': device_add [ 41.751037] PM: Adding info for No Bus:0:29 [ 41.780700] device: '0:28': device_unregister [ 41.785400] PM: Removing info for No Bus:0:28 [ 41.790344] device: '0:28': device_create_release Thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/