I'm experiencing the following issue: Environment: NFS client and server both running kernel: 3.1.0-rc7-amd64 # nfsstat -m /opt/xorsyst/nfs_test from 192.168.1.53:/opt/xorsyst/nfs_test Flags: rw,relatime,vers=4,rsize=32768,wsize=32768,namlen=255,hard,proto=udp,port=0,timeo=600,retrans=6,sec=sys,clientaddr=192.168.1.52,minorversion=0,local_lock=none,addr=192.168.1.53 root@dl385g5-2:~# cat /var/log/kern.log Oct 16 16:48:56 dl385g5-2 kernel: [169292.007444] nfs: server 192.168.1.53 not responding, still trying Oct 16 16:48:56 dl385g5-2 kernel: [169292.023387] nfs: server 192.168.1.53 OK Oct 16 16:51:00 dl385g5-2 kernel: [169416.418880] nfs: server 192.168.1.53 not responding, still trying Oct 16 16:51:00 dl385g5-2 kernel: [169416.445781] nfs: server 192.168.1.53 OK Oct 17 08:56:33 dl385g5-2 kernel: [227349.728181] nfs: server 192.168.1.53 not responding, still trying Oct 17 08:56:33 dl385g5-2 kernel: [227349.729314] nfs: server 192.168.1.53 not responding, still trying Oct 17 08:56:33 dl385g5-2 kernel: [227349.730427] nfs: server 192.168.1.53 not responding, still trying Oct 17 08:56:33 dl385g5-2 kernel: [227349.731753] nfs: server 192.168.1.53 not responding, still trying Oct 17 08:59:31 dl385g5-2 kernel: [227523.904249] INFO: task flush-0:20:19406 blocked for more than 120 seconds. Oct 17 08:59:31 dl385g5-2 kernel: [227523.905508] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Oct 17 08:59:31 dl385g5-2 kernel: [227523.906942] flush-0:20 D ffff8800033a6fa0 0 19406 2 0x00000000 Oct 17 08:59:31 dl385g5-2 kernel: [227523.908319] ffff8800033a6fa0 0000000000000046 0000000000000007 ffffffff81062878 Oct 17 08:59:31 dl385g5-2 kernel: [227523.909854] ffff880087f96340 0000000000012f00 ffff8800b5d21fd8 ffff8800b5d21fd8 Oct 17 08:59:31 dl385g5-2 kernel: [227523.911452] 0000000000012f00 ffff8800033a6fa0 0000000000012f00 0000000000012f00 Oct 17 08:59:31 dl385g5-2 kernel: [227523.913129] Call Trace: Oct 17 08:59:31 dl385g5-2 kernel: [227523.913757] [<ffffffff81062878>] ? wake_up_bit+0x10/0x23 Oct 17 08:59:31 dl385g5-2 kernel: [227523.914976] [<ffffffff81074878>] ? arch_local_irq_save+0x14/0x1d Oct 17 08:59:31 dl385g5-2 kernel: [227523.916395] [<ffffffff811109e8>] ? init_special_inode+0x8a/0x8a Oct 17 08:59:31 dl385g5-2 kernel: [227523.917721] [<ffffffff811109f1>] ? inode_wait+0x9/0x10 Oct 17 08:59:31 dl385g5-2 kernel: [227523.918911] [<ffffffff81343f3f>] ? __wait_on_bit+0x3e/0x71 Oct 17 08:59:31 dl385g5-2 kernel: [227523.920217] [<ffffffff8111bb76>] ? inode_wait_for_writeback+0x96/0xbe Oct 17 08:59:31 dl385g5-2 kernel: [227523.921699] [<ffffffff810628b5>] ? autoremove_wake_function+0x2a/0x2a Oct 17 08:59:31 dl385g5-2 kernel: [227523.923166] [<ffffffff8111c795>] ? wb_writeback+0x1ef/0x21c Oct 17 08:59:31 dl385g5-2 kernel: [227523.924483] [<ffffffff8111ce8b>] ? wb_do_writeback+0x186/0x1a2 Oct 17 08:59:31 dl385g5-2 kernel: [227523.925801] [<ffffffff8111cf2d>] ? bdi_writeback_thread+0x86/0x20a Oct 17 08:59:31 dl385g5-2 kernel: [227523.927209] [<ffffffff8111cea7>] ? wb_do_writeback+0x1a2/0x1a2 Oct 17 08:59:31 dl385g5-2 kernel: [227523.928619] [<ffffffff8111cea7>] ? wb_do_writeback+0x1a2/0x1a2 Oct 17 08:59:31 dl385g5-2 kernel: [227523.929921] [<ffffffff81062413>] ? kthread+0x7a/0x82 Oct 17 08:59:31 dl385g5-2 kernel: [227523.931075] [<ffffffff8134bfb4>] ? kernel_thread_helper+0x4/0x10 Oct 17 08:59:31 dl385g5-2 kernel: [227523.932506] [<ffffffff81062399>] ? kthread_worker_fn+0x149/0x149 Oct 17 08:59:31 dl385g5-2 kernel: [227523.933892] [<ffffffff8134bfb0>] ? gs_change+0x13/0x13 Oct 17 08:59:31 dl385g5-2 kernel: [227523.935109] INFO: task fblockio:3979 blocked for more than 120 seconds. Oct 17 08:59:31 dl385g5-2 kernel: [227523.936605] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Oct 17 08:59:31 dl385g5-2 kernel: [227523.938342] fblockio D ffff8800cf42b890 0 3979 16777 0x00000000 Oct 17 08:59:31 dl385g5-2 kernel: [227523.939933] ffff8800cf42b890 0000000000000082 ffff8800a55c2910 ffff8800a55c2400 Oct 17 08:59:31 dl385g5-2 kernel: [227523.941606] ffff8800033a6fa0 0000000000012f00 ffff8800b5d71fd8 ffff8800b5d71fd8 Oct 17 08:59:31 dl385g5-2 kernel: [227523.943201] 0000000000012f00 ffff8800cf42b890 0000000000012f00 0000000000012f00 Oct 17 08:59:31 dl385g5-2 kernel: [227523.944953] Call Trace: Oct 17 08:59:31 dl385g5-2 kernel: [227523.945505] [<ffffffff8101364e>] ? read_tsc+0x5/0x14 Oct 17 08:59:31 dl385g5-2 kernel: [227523.946660] [<ffffffff810697f7>] ? timekeeping_get_ns+0xd/0x2a Oct 17 08:59:31 dl385g5-2 kernel: [227523.948005] [<ffffffff810b82cc>] ? lock_page+0x20/0x20 Oct 17 08:59:31 dl385g5-2 kernel: [227523.949206] [<ffffffff81343adf>] ? io_schedule+0x5b/0x75 Oct 17 08:59:31 dl385g5-2 kernel: [227523.950448] [<ffffffff811adae2>] ? radix_tree_gang_lookup_slot+0x82/0xa4 Oct 17 08:59:31 dl385g5-2 kernel: [227523.952004] [<ffffffff810b82d5>] ? sleep_on_page+0x9/0x10 Oct 17 08:59:31 dl385g5-2 kernel: [227523.953245] [<ffffffff81343e41>] ? __wait_on_bit_lock+0x3c/0x85 Oct 17 08:59:31 dl385g5-2 kernel: [227523.954635] [<ffffffff810b82a6>] ? __lock_page+0x5d/0x63 Oct 17 08:59:31 dl385g5-2 kernel: [227523.955899] [<ffffffff810628b5>] ? autoremove_wake_function+0x2a/0x2a Oct 17 08:59:31 dl385g5-2 kernel: [227523.957372] [<ffffffff810c1f50>] ? lock_page+0x11/0x20 Oct 17 08:59:31 dl385g5-2 kernel: [227523.958572] [<ffffffff810c202a>] ? invalidate_inode_pages2_range+0x78/0x22e Oct 17 08:59:31 dl385g5-2 kernel: [227523.960178] [<ffffffffa0465d3e>] ? nfs_revalidate_mapping+0x70/0xfb [nfs] Oct 17 08:59:31 dl385g5-2 kernel: [227523.961713] [<ffffffffa0463eb8>] ? nfs_file_read+0x96/0xd8 [nfs] Oct 17 08:59:31 dl385g5-2 kernel: [227523.963081] [<ffffffff810fe0bb>] ? do_sync_read+0xb1/0xea Oct 17 08:59:31 dl385g5-2 kernel: [227523.964335] [<ffffffff8105849b>] ? group_send_sig_info+0x11/0x34 Oct 17 08:59:31 dl385g5-2 kernel: [227523.965735] [<ffffffff810fe70f>] ? vfs_read+0x9f/0xf2 Oct 17 08:59:31 dl385g5-2 kernel: [227523.966945] [<ffffffff810fe88b>] ? sys_pread64+0x53/0x6e Oct 17 08:59:31 dl385g5-2 kernel: [227523.968179] [<ffffffff81349e52>] ? system_call_fastpath+0x16/0x1b Oct 17 08:59:31 dl385g5-2 kernel: [227523.969583] INFO: task fblockio:3747 blocked for more than 120 seconds. Oct 17 08:59:31 dl385g5-2 kernel: [227523.971060] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Oct 17 08:59:31 dl385g5-2 kernel: [227523.972806] fblockio D ffff8800a55c2400 0 3747 16777 0x00000000 Oct 17 08:59:31 dl385g5-2 kernel: [227523.974141] ffff8800a55c2400 0000000000000086 ffff8800b5c1b3b0 ffff8800b5c1aea0 Oct 17 08:59:31 dl385g5-2 kernel: [227523.975764] ffff8800b5c1aea0 0000000000012f00 ffff8800b5dc7fd8 ffff8800b5dc7fd8 Oct 17 08:59:31 dl385g5-2 kernel: [227523.977465] 0000000000012f00 ffff8800a55c2400 0000000000012f00 0000000000012f00 Oct 17 08:59:31 dl385g5-2 kernel: [227523.979127] Call Trace: Oct 17 08:59:31 dl385g5-2 kernel: [227523.979686] [<ffffffff8101364e>] ? read_tsc+0x5/0x14 Oct 17 08:59:31 dl385g5-2 kernel: [227523.980845] [<ffffffff810697f7>] ? timekeeping_get_ns+0xd/0x2a Oct 17 08:59:31 dl385g5-2 kernel: [227523.982175] [<ffffffff810b82cc>] ? lock_page+0x20/0x20 Oct 17 08:59:31 dl385g5-2 kernel: [227523.983363] [<ffffffff81343adf>] ? io_schedule+0x5b/0x75 Oct 17 08:59:31 dl385g5-2 kernel: [227523.984611] [<ffffffff811adae2>] ? radix_tree_gang_lookup_slot+0x82/0xa4 Oct 17 08:59:31 dl385g5-2 kernel: [227523.986147] [<ffffffff810b82d5>] ? sleep_on_page+0x9/0x10 Oct 17 08:59:31 dl385g5-2 kernel: [227523.987391] [<ffffffff81343e41>] ? __wait_on_bit_lock+0x3c/0x85 Oct 17 08:59:31 dl385g5-2 kernel: [227523.988806] [<ffffffff810b82a6>] ? __lock_page+0x5d/0x63 Oct 17 08:59:31 dl385g5-2 kernel: [227523.990028] [<ffffffff810628b5>] ? autoremove_wake_function+0x2a/0x2a Oct 17 08:59:31 dl385g5-2 kernel: [227523.991506] [<ffffffff810c1f50>] ? lock_page+0x11/0x20 Oct 17 08:59:31 dl385g5-2 kernel: [227523.992655] [<ffffffff810c202a>] ? invalidate_inode_pages2_range+0x78/0x22e Oct 17 08:59:31 dl385g5-2 kernel: [227523.994233] [<ffffffffa0465d3e>] ? nfs_revalidate_mapping+0x70/0xfb [nfs] Oct 17 08:59:31 dl385g5-2 kernel: [227523.995796] [<ffffffffa0463eb8>] ? nfs_file_read+0x96/0xd8 [nfs] Oct 17 08:59:31 dl385g5-2 kernel: [227523.997160] [<ffffffff810fe0bb>] ? do_sync_read+0xb1/0xea Oct 17 08:59:31 dl385g5-2 kernel: [227523.998421] [<ffffffff810fe70f>] ? vfs_read+0x9f/0xf2 Oct 17 08:59:31 dl385g5-2 kernel: [227523.999604] [<ffffffff810fe7a7>] ? sys_read+0x45/0x6b Oct 17 08:59:31 dl385g5-2 kernel: [227524.000822] [<ffffffff81349e52>] ? system_call_fastpath+0x16/0x1b Oct 17 08:59:31 dl385g5-2 kernel: [227524.002210] INFO: task fblockio:3749 blocked for more than 120 seconds. Oct 17 08:59:31 dl385g5-2 kernel: [227524.003708] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Oct 17 08:59:31 dl385g5-2 kernel: [227524.005455] fblockio D ffff8800b5c1aea0 0 3749 16777 0x00000000 Oct 17 08:59:31 dl385g5-2 kernel: [227524.007043] ffff8800b5c1aea0 0000000000000086 ffff88012fc95dd0 0000000000000020 Oct 17 08:59:31 dl385g5-2 kernel: [227524.008712] ffff880124a2d7d0 0000000000012f00 ffff8800a5653fd8 ffff8800a5653fd8 Oct 17 08:59:31 dl385g5-2 kernel: [227524.010308] 0000000000012f00 ffff8800b5c1aea0 0000000000012f00 0000000000012f00 Oct 17 08:59:31 dl385g5-2 kernel: [227524.011923] Call Trace: Oct 17 08:59:31 dl385g5-2 kernel: [227524.012466] [<ffffffff8101364e>] ? read_tsc+0x5/0x14 Oct 17 08:59:31 dl385g5-2 kernel: [227524.013630] [<ffffffff810697f7>] ? timekeeping_get_ns+0xd/0x2a Oct 17 08:59:31 dl385g5-2 kernel: [227524.014967] [<ffffffff810b82cc>] ? lock_page+0x20/0x20 Oct 17 08:59:31 dl385g5-2 kernel: [227524.016201] [<ffffffff81343adf>] ? io_schedule+0x5b/0x75 Oct 17 08:59:31 dl385g5-2 kernel: [227524.017427] [<ffffffff811adae2>] ? radix_tree_gang_lookup_slot+0x82/0xa4 Oct 17 08:59:31 dl385g5-2 kernel: [227524.018962] [<ffffffff810b82d5>] ? sleep_on_page+0x9/0x10 Oct 17 08:59:31 dl385g5-2 kernel: [227524.020214] [<ffffffff81343e41>] ? __wait_on_bit_lock+0x3c/0x85 Oct 17 08:59:31 dl385g5-2 kernel: [227524.021583] [<ffffffff810b82a6>] ? __lock_page+0x5d/0x63 Oct 17 08:59:31 dl385g5-2 kernel: [227524.022808] [<ffffffff810628b5>] ? autoremove_wake_function+0x2a/0x2a Oct 17 08:59:31 dl385g5-2 kernel: [227524.024302] [<ffffffff810c1f50>] ? lock_page+0x11/0x20 Oct 17 08:59:31 dl385g5-2 kernel: [227524.025502] [<ffffffff810c202a>] ? invalidate_inode_pages2_range+0x78/0x22e Oct 17 08:59:31 dl385g5-2 kernel: [227524.027034] [<ffffffffa0465d3e>] ? nfs_revalidate_mapping+0x70/0xfb [nfs] Oct 17 08:59:31 dl385g5-2 kernel: [227524.028633] [<ffffffffa0463eb8>] ? nfs_file_read+0x96/0xd8 [nfs] Oct 17 08:59:31 dl385g5-2 kernel: [227524.030001] [<ffffffff810fe0bb>] ? do_sync_read+0xb1/0xea Oct 17 08:59:31 dl385g5-2 kernel: [227524.031261] [<ffffffff810fe70f>] ? vfs_read+0x9f/0xf2 Oct 17 08:59:31 dl385g5-2 kernel: [227524.032435] [<ffffffff810fe7a7>] ? sys_read+0x45/0x6b Oct 17 08:59:31 dl385g5-2 kernel: [227524.033615] [<ffffffff81349e52>] ? system_call_fastpath+0x16/0x1b Oct 17 08:59:31 dl385g5-2 kernel: [227524.035009] INFO: task fblockio:3752 blocked for more than 120 seconds. Oct 17 08:59:31 dl385g5-2 kernel: [227524.036532] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Oct 17 08:59:31 dl385g5-2 kernel: [227524.038269] fblockio D ffff8800cf446f20 0 3752 16777 0x00000000 Oct 17 08:59:31 dl385g5-2 kernel: [227524.039951] ffff8800cf446f20 0000000000000082 ffff88012fff7e00 ffff8800b5f25be8 Oct 17 08:59:31 dl385g5-2 kernel: [227524.041682] ffff88009e3e58d0 0000000000012f00 ffff8800b5f25fd8 ffff8800b5f25fd8 Oct 17 08:59:31 dl385g5-2 kernel: [227524.043283] 0000000000012f00 ffff8800cf446f20 0000000000012f00 0000000000012f00 Oct 17 08:59:31 dl385g5-2 kernel: [227524.044951] Call Trace: Oct 17 08:59:31 dl385g5-2 kernel: [227524.045500] [<ffffffff8101364e>] ? read_tsc+0x5/0x14 Oct 17 08:59:31 dl385g5-2 kernel: [227524.046604] [<ffffffff810697f7>] ? timekeeping_get_ns+0xd/0x2a Oct 17 08:59:31 dl385g5-2 kernel: [227524.052184] [<ffffffff810b82cc>] ? lock_page+0x20/0x20 Oct 17 08:59:31 dl385g5-2 kernel: [227524.053190] [<ffffffff81343adf>] ? io_schedule+0x5b/0x75 Oct 17 08:59:31 dl385g5-2 kernel: [227524.054136] [<ffffffff811adae2>] ? radix_tree_gang_lookup_slot+0x82/0xa4 Oct 17 08:59:31 dl385g5-2 kernel: [227524.055288] [<ffffffff810b82d5>] ? sleep_on_page+0x9/0x10 Oct 17 08:59:31 dl385g5-2 kernel: [227524.056279] [<ffffffff81343e41>] ? __wait_on_bit_lock+0x3c/0x85 Oct 17 08:59:31 dl385g5-2 kernel: [227524.057341] [<ffffffff810b82a6>] ? __lock_page+0x5d/0x63 Oct 17 08:59:31 dl385g5-2 kernel: [227524.058303] [<ffffffff810628b5>] ? autoremove_wake_function+0x2a/0x2a Oct 17 08:59:31 dl385g5-2 kernel: [227524.059511] [<ffffffff810c1f50>] ? lock_page+0x11/0x20 Oct 17 08:59:31 dl385g5-2 kernel: [227524.060437] [<ffffffff810c202a>] ? invalidate_inode_pages2_range+0x78/0x22e Oct 17 08:59:31 dl385g5-2 kernel: [227524.061687] [<ffffffffa0465d3e>] ? nfs_revalidate_mapping+0x70/0xfb [nfs] Oct 17 08:59:31 dl385g5-2 kernel: [227524.077420] [<ffffffffa0463eb8>] ? nfs_file_read+0x96/0xd8 [nfs] Oct 17 08:59:31 dl385g5-2 kernel: [227524.078793] [<ffffffff810fe0bb>] ? do_sync_read+0xb1/0xea Oct 17 08:59:31 dl385g5-2 kernel: [227524.080020] [<ffffffff810fe70f>] ? vfs_read+0x9f/0xf2 Oct 17 08:59:31 dl385g5-2 kernel: [227524.081149] [<ffffffff810fe7a7>] ? sys_read+0x45/0x6b Oct 17 08:59:31 dl385g5-2 kernel: [227524.082141] [<ffffffff81349e52>] ? system_call_fastpath+0x16/0x1b root@dl385g5-2:~# => Found http://www.spinics.net/lists/linux-nfs/msg24282.html Not exactly the same backtrace...any assistance would be helpful. Thanking you'll in advance. - Dilip Daya. -- 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
