Having same problem on Client: Ubuntu 12.04.2 LTS (GNU/Linux 3.2.0-69-generic-pae i686) Server: Ubuntu 12.04.5 LTS (GNU/Linux 3.2.0-77-generic x86_64)
This is frighteningly bad. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/561210 Title: Writing big files to NFS target causes system lock up Status in linux package in Ubuntu: Fix Released Status in linux source package in Lucid: Fix Released Status in linux source package in Maverick: Fix Released Status in linux source package in Natty: Fix Released Bug description: I'm experiencing complete system lock ups occasionally when writing big files to an NFS target. I can't remember that I had such issues with Jaunty, but at least Karmic and Lucid are affected in the exact same way. In most cases just the "mv" or "cp" process hangs for a while, but sometimes the whole system freezes, including X. Although some things keep running (e.g. the clock on my G15 Keyboard LCD display doesn't freeze, so the g15daemon keeps running as usual), I'm unable to get the system back to a normal state. Even waiting a whole night for the NFS task to finish doesn't succeed. In such a case the NFS server side is completely idle, not receiving any data from the client. I have to hard reset the client machine to get a working system again. The server is a Busybox NAS system with the following exports options: rw,no_wdelay,no_root_squash,insecure_locks,no_subtree_check The clients are mounting with these options: rw,rsize=32768,wsize=32768,hard,intr,noatime All machines are connected through a LevelOne GSW-0803T 8-port GBit switch with Cat6e cables. No wireless here. No other issues with networking here. The client machines are both AMD64 AMD Quad-Cores, both have GigaByte mainboards using the internal GBit Ethernet connector for networking. Some time ago I also used a Dell Inspiron (32-bit Pentium-M system) notebook with a 100MBit connection on this network without such issues. The following gets logged during one of those lock-ups: INFO: task mv:26028 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. mv D 00000000ffffffff 0 26028 2040 0x00000000 ffff880100198f08 0000000000000086 0000000000015b80 0000000000015b80 ffff880001dc83c0 ffff880100199fd8 0000000000015b80 ffff880001dc8000 0000000000015b80 ffff880100199fd8 0000000000015b80 ffff880001dc83c0 Call Trace: [<ffffffffa0418280>] ? nfs_wait_bit_uninterruptible+0x0/0x20 [nfs] [<ffffffff8153e697>] io_schedule+0x47/0x70 [<ffffffffa041828e>] nfs_wait_bit_uninterruptible+0xe/0x20 [nfs] [<ffffffff8153eeef>] __wait_on_bit+0x5f/0x90 [<ffffffff81013cae>] ? apic_timer_interrupt+0xe/0x20 [<ffffffffa0418280>] ? nfs_wait_bit_uninterruptible+0x0/0x20 [nfs] [<ffffffff8153ef98>] out_of_line_wait_on_bit+0x78/0x90 [<ffffffff81085340>] ? wake_bit_function+0x0/0x40 [<ffffffffa041826f>] nfs_wait_on_request+0x2f/0x40 [nfs] [<ffffffffa041c66f>] nfs_wait_on_requests_locked+0x7f/0xd0 [nfs] [<ffffffffa041daae>] nfs_sync_mapping_wait+0x9e/0x1a0 [nfs] [<ffffffffa041dc31>] nfs_wb_page+0x81/0xe0 [nfs] [<ffffffffa040cb17>] nfs_release_page+0x57/0x70 [nfs] [<ffffffff810f2a52>] try_to_release_page+0x32/0x50 [<ffffffff811016a3>] shrink_page_list+0x453/0x5f0 [<ffffffff81101b4d>] shrink_inactive_list+0x30d/0x7e0 [<ffffffff810fbcda>] ? determine_dirtyable_memory+0x1a/0x30 [<ffffffff810fbd87>] ? get_dirty_limits+0x27/0x2f0 [<ffffffff811020b1>] shrink_list+0x91/0xf0 [<ffffffff811022a7>] shrink_zone+0x197/0x240 [<ffffffff811023c2>] shrink_zones+0x72/0x100 [<ffffffff811024ce>] do_try_to_free_pages+0x7e/0x330 [<ffffffff8110287f>] try_to_free_pages+0x6f/0x80 [<ffffffff811003c0>] ? isolate_pages_global+0x0/0x50 [<ffffffff810f992a>] __alloc_pages_slowpath+0x27a/0x580 [<ffffffff810f9d8e>] __alloc_pages_nodemask+0x15e/0x1a0 [<ffffffff8112cc07>] alloc_pages_current+0x87/0xd0 [<ffffffff81132728>] new_slab+0x248/0x310 [<ffffffff81134fb9>] __slab_alloc+0x169/0x2d0 [<ffffffff810f5ab5>] ? mempool_alloc_slab+0x15/0x20 [<ffffffff811354e4>] kmem_cache_alloc+0xe4/0x150 [<ffffffff810f5ab5>] mempool_alloc_slab+0x15/0x20 [<ffffffff810f5c53>] mempool_alloc+0x63/0x140 [<ffffffff81085300>] ? autoremove_wake_function+0x0/0x40 [<ffffffffa041ce70>] nfs_writedata_alloc+0x20/0xc0 [nfs] [<ffffffffa041cf32>] nfs_flush_one+0x22/0xf0 [nfs] [<ffffffffa0418097>] nfs_pageio_doio+0x37/0x80 [nfs] [<ffffffffa0418134>] nfs_pageio_add_request+0x54/0x100 [nfs] [<ffffffffa041c47d>] nfs_page_async_flush+0x9d/0xf0 [nfs] [<ffffffffa041c557>] nfs_do_writepage+0x87/0x90 [nfs] [<ffffffffa041cc9e>] nfs_writepages_callback+0x1e/0x40 [nfs] [<ffffffff810fcac7>] write_cache_pages+0x227/0x4d0 [<ffffffffa041cc80>] ? nfs_writepages_callback+0x0/0x40 [nfs] [<ffffffffa041cc09>] nfs_writepages+0xb9/0x130 [nfs] [<ffffffffa041cf10>] ? nfs_flush_one+0x0/0xf0 [nfs] [<ffffffff810fcdc1>] do_writepages+0x21/0x40 [<ffffffff810f40ab>] __filemap_fdatawrite_range+0x5b/0x60 [<ffffffff810f43df>] filemap_fdatawrite+0x1f/0x30 [<ffffffff810f4425>] filemap_write_and_wait+0x35/0x50 [<ffffffffa041055b>] nfs_setattr+0x15b/0x180 [nfs] [<ffffffff810f4c26>] ? generic_file_aio_read+0xb6/0x1d0 [<ffffffff81013b0e>] ? common_interrupt+0xe/0x13 [<ffffffff810f36de>] ? find_get_page+0x1e/0xa0 [<ffffffff810f50c9>] ? filemap_fault+0xb9/0x460 [<ffffffff8106c4a7>] ? current_fs_time+0x27/0x30 [<ffffffff8115b7db>] notify_change+0x16b/0x350 [<ffffffff8116a16c>] utimes_common+0xdc/0x1b0 [<ffffffff812b6eba>] ? __up_read+0x9a/0xc0 [<ffffffff8116a2e1>] do_utimes+0xa1/0xf0 [<ffffffff81543378>] ? do_page_fault+0x158/0x3b0 [<ffffffff8116a442>] sys_utimensat+0x32/0x90 [<ffffffff810131b2>] system_call_fastpath+0x16/0x1b Other tasks raising such messages (the same session): [103440.890116] INFO: task kswapd0:52 blocked for more than 120 seconds. [103440.890576] INFO: task Xorg:1300 blocked for more than 120 seconds. [103440.891199] INFO: task plasma-desktop:1987 blocked for more than 120 seconds. [103440.892078] INFO: task mv:26028 blocked for more than 120 seconds. [103560.890060] INFO: task kswapd0:52 blocked for more than 120 seconds. [103560.890516] INFO: task Xorg:1300 blocked for more than 120 seconds. [103560.891139] INFO: task plasma-desktop:1987 blocked for more than 120 seconds. [103560.892002] INFO: task mv:26028 blocked for more than 120 seconds. [103680.890072] INFO: task kswapd0:52 blocked for more than 120 seconds. [103680.890535] INFO: task Xorg:1300 blocked for more than 120 seconds. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561210/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
