Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753366AbcD0OcU (ORCPT ); Wed, 27 Apr 2016 10:32:20 -0400 Received: from mail1.asahi-net.or.jp ([202.224.39.197]:51542 "EHLO mail1.asahi-net.or.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752502AbcD0OcQ (ORCPT ); Wed, 27 Apr 2016 10:32:16 -0400 Date: Wed, 27 Apr 2016 23:32:13 +0900 Message-ID: <87wpnjjf6a.wl-ysato@users.sourceforge.jp> From: Yoshinori Sato To: Trond Myklebust Cc: linux-kernel@vger.kernel.org Subject: NFS swap hangup User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL/10.8 EasyPG/1.0.0 Emacs/24.5 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4807 Lines: 70 Hello. Your commit 15001e5a7e1e207b6bd258cd8f187814cd15b6dc is hang up in my system. Lock detector said NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapon:933] Modules linked in: CPU: 0 PID: 933 Comm: swapon Not tainted 4.6.0-rc5-08195-g94cf084-dirty #884 task: 8f026240 ti: 8f10a000 task.ti: 8f10a000 PC is at xprt_iter_next_entry_multiple+0x22/0xd0 PR is at xprt_iter_next_entry_all+0xc/0x1c PC : 8c32920a SP : 8f10be4c SR : 40008000 TEA : c00a3000 R0 : 8c3291e8 R1 : 8f06f6e0 R2 : 8f06f6e0 R3 : 00000001 R4 : 8f10bebc R5 : 8c3290e8 R6 : 00000000 R7 : 00000020 R8 : 8c3292d4 R9 : 8f10bebc R10 : 8c313320 R11 : 8f10bebc R12 : 8f06b000 R13 : 8c313864 R14 : 8f10be4c MACH: 00000007 MACL: 00001300 GBR : 29579bd0 PR : 8c3292e0 Call trace: [<8c3290e8>] xprt_switch_find_next_entry+0x0/0x38 [<8c039c38>] __lock_acquire.isra.16+0x0/0xaa0 [<8c3292e0>] xprt_iter_next_entry_all+0xc/0x1c [<8c313864>] xprt_put+0x0/0x64 [<8c310198>] rpc_clnt_swap_activate_callback+0x0/0x18 [<8c313320>] xprt_get+0x0/0x88 [<8c3292d4>] xprt_iter_next_entry_all+0x0/0x1c [<8c329140>] xprt_iter_get_helper+0x20/0x38 [<8c329852>] xprt_iter_get_next+0x32/0x6c [<8c329820>] xprt_iter_get_next+0x0/0x6c [<8c329120>] xprt_iter_get_helper+0x0/0x38 [<8c329820>] xprt_iter_get_next+0x0/0x6c [<8c310c5c>] rpc_clnt_iterate_for_each_xprt+0x80/0xd8 [<8c310bdc>] rpc_clnt_iterate_for_each_xprt+0x0/0xd8 [<8c312470>] rpc_clnt_swap_activate+0x4c/0x70 [<8c310bdc>] rpc_clnt_iterate_for_each_xprt+0x0/0xd8 [<8c00376c>] arch_local_irq_restore+0x0/0x2c [<8c170d30>] nfs_swap_activate+0x28/0x38 [<8c0aaf42>] SyS_swapon+0x96a/0xf24 [<8c0e94d4>] fsnotify+0x0/0x31c [<8c0c6ae4>] dput+0x0/0x244 [<8c0cec1c>] mntput+0x0/0x30 [<8c048630>] call_rcu_sched+0x0/0x1c [<8c0b3e68>] __fput+0xfc/0x1f0 [<8c0b3fc2>] ____fput+0xa/0x18 [<8c008242>] syscall_call+0x18/0x1e [<8c0aa5d8>] SyS_swapon+0x0/0xf24 2 locks held by swapon/933: x #0: (&sb->s_type->i_mutex_key#6){......}, at: [<8c0aa7ae>] SyS_swapon+0x1d6/0 f24 #1: (rcu_read_lock){......}, at: [<8c329820>] xprt_iter_get_next+0x0/0x6c Code: 8c329204: mov.l r5, @r14 8c329206: mov.l @(44,r1), r3 8c329208: mov r1, r2 ->8c32920a: mov #1, r0 8c32920c: add #48, r2 8c32920e: cmp/hi r0, r3 8c329210: bf.s 8c32926a 8c329212: mov.l r2, @(4,r14) 8c329214: mov.l @(4,r4), r8 Is anything invastigate? Thanks. -- Yoshinori Sato