Trond Myklebust: > OK. Does the following patch fix the deadlock for you? Thanx for the patch, but it didn't work. BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 IP: [<ffffffff811cb860>] nfs_clear_page_tag_locked+0x20/0x80 PGD 1e641067 PUD 135a3067 PMD 0 Oops: 0000 [#1] PREEMPT SMP last sysfs file: /sys/fs/aufs/si_fa7907d8bbb32280/br1 CPU 0 Modules linked in: aufs configs nfsd exportfs nls_iso8859_1 nls_cp437 [last unloaded: aufs] Pid: 308, comm: nfsiod Not tainted 2.6.33aufsD #730 IPM41/Pegatron RIP: 0010:[<ffffffff811cb860>] [<ffffffff811cb860>] nfs_clear_page_tag_locked+0x20/0x80 RSP: 0018:ffff88001f26bd10 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff86b47850 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88001b87e7c0 RBP: ffff88001f26bd30 R08: fdb3fbf8f8168244 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88001b87e7c0 R13: ffff88001f277110 R14: 0000000000000000 R15: ffff88001f2772f8 FS: 0000000000000000(0000) GS:ffff88000bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000010 CR3: 000000001de5a000 CR4: 00000000000406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process nfsiod (pid: 308, threadinfo ffff88001f26a000, task ffff88001fe92040) Stack: ffff88001b87e7c0 0000000000000000 ffff88001b87e7c0 ffff88001f277110 <0> ffff88001f26bd70 ffffffff811d1464 ffff88001f2772ec 0000000000000000 <0> ffff88001f277118 ffff88001f277110 ffffffff8162b980 ffffffff81435e20 Call Trace: [<ffffffff811d1464>] nfs_commit_release+0x74/0x210 [<ffffffff81435e20>] ? rpc_async_release+0x0/0x20 [<ffffffff81435c82>] rpc_release_calldata+0x12/0x20 [<ffffffff81435cea>] rpc_free_task+0x3a/0xa0 [<ffffffff81435e30>] rpc_async_release+0x10/0x20 [<ffffffff8106bd84>] worker_thread+0x2d4/0x420 [<ffffffff8106bd31>] ? worker_thread+0x281/0x420 [<ffffffff81070ca0>] ? autoremove_wake_function+0x0/0x40 [<ffffffff8106bab0>] ? worker_thread+0x0/0x420 [<ffffffff810706d6>] kthread+0x96/0xb0 [<ffffffff8100b5a4>] kernel_thread_helper+0x4/0x10 [<ffffffff81464f14>] ? restore_args+0x0/0x30 [<ffffffff81070640>] ? kthread+0x0/0xb0 [<ffffffff8100b5a0>] ? kernel_thread_helper+0x0/0x10 Code: 29 00 0f 0b eb fe 0f 1f 44 00 00 55 48 89 e5 48 83 ec 20 4c 89 65 f0 48 89 5d e8 4c 89 6d f8 49 89 fc 48 8b 47 18 48 83 7f 10 00 <48> 8b 40 10 4c 8b 68 40 74 46 49 8d 9d b0 00 00 00 48 89 df e8 RIP [<ffffffff811cb860>] nfs_clear_page_tag_locked+0x20/0x80 RSP <ffff88001f26bd10> CR2: 0000000000000010 ---[ end trace 1265485acdc49b9d ]--- J. R. Okajima -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
