From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751312AbaFMMyP (ORCPT ); Fri, 13 Jun 2014 08:54:15 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:47027 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751089AbaFMMyO (ORCPT ); Fri, 13 Jun 2014 08:54:14 -0400 Message-ID: <539AF460.4000400@oracle.com> Date: Fri, 13 Jun 2014 08:53:52 -0400 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: Christoph Lameter , Pekka Enberg , Al Viro , Andrew Morton , Matt Mackall CC: linux-fsdevel , LKML , "linux-mm@kvack.org" , Dave Jones Subject: mm/fs: gpf when shrinking slab X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ 7193.961785] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 7193.961785] Dumping ftrace buffer: [ 7193.961785] (ftrace buffer empty) [ 7193.961785] Modules linked in: [ 7193.961785] CPU: 2 PID: 4011 Comm: kswapd2 Not tainted 3.15.0-next-20140612-sasha-00022-g5e4db85-dirty #645 [ 7193.961785] task: ffff880035563000 ti: ffff88003557c000 task.ti: ffff88003557c000 [ 7193.961785] RIP: __lock_acquire (./arch/x86/include/asm/atomic.h:92 kernel/locking/lockdep.c:3082) [ 7193.961785] RSP: 0000:ffff88003557f848 EFLAGS: 00010002 [ 7193.961785] RAX: 0000000000000000 RBX: 6b6b6b6b6b6b6b6b RCX: 0000000000000000 [ 7193.961785] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8800761fbae0 [ 7193.961785] RBP: ffff88003557f938 R08: 0000000000000001 R09: 0000000000000000 [ 7193.961785] R10: ffff8800761fbae0 R11: 0000000000000000 R12: ffff880035563000 [ 7193.961785] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 7193.961785] FS: 0000000000000000(0000) GS:ffff8800a6e00000(0000) knlGS:0000000000000000 [ 7193.961785] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 7193.961785] CR2: 0000000005aabfc8 CR3: 00000006d5276000 CR4: 00000000000006a0 [ 7193.961785] DR0: 00000000006df000 DR1: 0000000000000000 DR2: 0000000000000000 [ 7193.961785] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 [ 7193.961785] Stack: [ 7193.961785] ffff88003557f948 ffffffff891cbe79 ffffffff908c1c38 ffffffff908c1c30 [ 7193.961785] ffff880000000001 ffffffff8919ff21 0000000000000000 ffff8800a6fd8340 [ 7193.961785] 0000000000000000 ffff8800a6fd8340 ffff8800a6fd8350 0000000000000282 [ 7193.961785] Call Trace: [ 7193.961785] lock_acquire (./arch/x86/include/asm/current.h:14 kernel/locking/lockdep.c:3602) [ 7193.961785] ? shrink_dentry_list (fs/dcache.c:550 fs/dcache.c:781) [ 7193.961785] _raw_spin_lock (include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:151) [ 7193.961785] ? shrink_dentry_list (fs/dcache.c:550 fs/dcache.c:781) [ 7193.961785] ? rcu_read_lock (include/linux/rcupdate.h:870 (discriminator 2)) [ 7193.961785] shrink_dentry_list (fs/dcache.c:550 fs/dcache.c:781) [ 7193.961785] prune_dcache_sb (fs/dcache.c:934) [ 7193.961785] super_cache_scan (fs/super.c:94) [ 7193.961785] shrink_slab_node (mm/vmscan.c:312) [ 7193.961785] ? mem_cgroup_iter (mm/memcontrol.c:1258) [ 7193.961785] ? mem_cgroup_iter (include/linux/rcupdate.h:867 mm/memcontrol.c:1222) [ 7193.961785] shrink_slab (mm/vmscan.c:387) [ 7193.961785] kswapd_shrink_zone (mm/vmscan.c:3028) [ 7193.961785] balance_pgdat (mm/vmscan.c:3209) [ 7193.961785] kswapd (mm/vmscan.c:3415) [ 7193.961785] ? bit_waitqueue (kernel/sched/wait.c:291) [ 7193.961785] ? balance_pgdat (mm/vmscan.c:3332) [ 7193.961785] kthread (kernel/kthread.c:210) [ 7193.961785] ? kthread_create_on_node (kernel/kthread.c:176) [ 7193.961785] ret_from_fork (arch/x86/kernel/entry_64.S:349) [ 7193.961785] ? kthread_create_on_node (kernel/kthread.c:176) [ 7193.961785] Code: 48 c7 c2 a7 0f 6f 8d 31 c0 be 3b 03 00 00 48 c7 c7 33 67 6f 8d e8 e1 51 f9 ff e9 94 04 00 00 48 85 db 0f 84 8b 04 00 00 0f 1f 00 ff 83 98 01 00 00 8b 05 2b 51 49 07 45 8b bc 24 f0 0c 00 00 All code ======== 0: 48 c7 c2 a7 0f 6f 8d mov $0xffffffff8d6f0fa7,%rdx 7: 31 c0 xor %eax,%eax 9: be 3b 03 00 00 mov $0x33b,%esi e: 48 c7 c7 33 67 6f 8d mov $0xffffffff8d6f6733,%rdi 15: e8 e1 51 f9 ff callq 0xfffffffffff951fb 1a: e9 94 04 00 00 jmpq 0x4b3 1f: 48 85 db test %rbx,%rbx 22: 0f 84 8b 04 00 00 je 0x4b3 28: 0f 1f 00 nopl (%rax) 2b:* f0 ff 83 98 01 00 00 lock incl 0x198(%rbx) <-- trapping instruction 32: 8b 05 2b 51 49 07 mov 0x749512b(%rip),%eax # 0x7495163 38: 45 8b bc 24 f0 0c 00 mov 0xcf0(%r12),%r15d 3f: 00 ... Code starting with the faulting instruction =========================================== 0: f0 ff 83 98 01 00 00 lock incl 0x198(%rbx) 7: 8b 05 2b 51 49 07 mov 0x749512b(%rip),%eax # 0x7495138 d: 45 8b bc 24 f0 0c 00 mov 0xcf0(%r12),%r15d 14: 00 ... [ 7193.961785] RIP __lock_acquire (./arch/x86/include/asm/atomic.h:92 kernel/locking/lockdep.c:3082) [ 7193.961785] RSP