I think we may have experienced the same bug as noted here because syslog shows sys_ftruncate().
I already posted a bug report here so this is a crosspost but I think this could more proper bug report for our issue: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/578866/comments/4 I try to run "bzr status" on our couple hundred megabyte development branch on our new NFSv4 share. This causes Bazaar on client to halt and cause errors on latest Ubuntu 10.10 AMD64 kernel 2.6.35-27-generic. This message appears repeately (every 120sec) in the syslog: Mar 14 17:25:46 hf kernel: [ 1080.078609] INFO: task bzr:2348 blocked for more than 120 seconds. Mar 14 17:25:46 hf kernel: [ 1080.078611] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Mar 14 17:25:46 hf kernel: [ 1080.078614] bzr D 00000000ffffa30f 0 2348 2347 0x00000000 Mar 14 17:25:46 hf kernel: [ 1080.078618] ffff880341823c08 0000000000000086 ffff880300000000 0000000000015980 Mar 14 17:25:46 hf kernel: [ 1080.078623] ffff880341823fd8 0000000000015980 ffff880341823fd8 ffff880344e3db80 Mar 14 17:25:46 hf kernel: [ 1080.078626] 0000000000015980 0000000000015980 ffff880341823fd8 0000000000015980 Mar 14 17:25:46 hf kernel: [ 1080.078630] Call Trace: Mar 14 17:25:46 hf kernel: [ 1080.078637] [<ffffffff81101c50>] ? sync_page+0x0/0x50 Mar 14 17:25:46 hf kernel: [ 1080.078641] [<ffffffff81589093>] io_schedule+0x73/0xc0 Mar 14 17:25:46 hf kernel: [ 1080.078644] [<ffffffff81101c8d>] sync_page+0x3d/0x50 Mar 14 17:25:46 hf kernel: [ 1080.078647] [<ffffffff8158996f>] __wait_on_bit+0x5f/0x90 Mar 14 17:25:46 hf kernel: [ 1080.078650] [<ffffffff81101e43>] wait_on_page_bit+0x73/0x80 Mar 14 17:25:46 hf kernel: [ 1080.078655] [<ffffffff8107faf0>] ? wake_bit_function+0x0/0x40 Mar 14 17:25:46 hf kernel: [ 1080.078659] [<ffffffff8110c605>] ? pagevec_lookup_tag+0x25/0x40 Mar 14 17:25:46 hf kernel: [ 1080.078662] [<ffffffff8110230d>] filemap_fdatawait_range+0x10d/0x1a0 Mar 14 17:25:46 hf kernel: [ 1080.078666] [<ffffffff811023cb>] filemap_fdatawait+0x2b/0x30 Mar 14 17:25:46 hf kernel: [ 1080.078669] [<ffffffff811026d4>] filemap_write_and_wait+0x44/0x50 Mar 14 17:25:46 hf kernel: [ 1080.078684] [<ffffffffa1802fec>] nfs_setattr+0x14c/0x160 [nfs] Mar 14 17:25:46 hf kernel: [ 1080.078688] [<ffffffff8116c69b>] notify_change+0x16b/0x310 Mar 14 17:25:46 hf kernel: [ 1080.078692] [<ffffffff81152694>] do_truncate+0x64/0xa0 Mar 14 17:25:46 hf kernel: [ 1080.078695] [<ffffffff8115292b>] T.784+0xeb/0x110 Mar 14 17:25:46 hf kernel: [ 1080.078698] [<ffffffff8115295e>] sys_ftruncate+0xe/0x10 Mar 14 17:25:46 hf kernel: [ 1080.078703] [<ffffffff8100a0f2>] system_call_fastpath+0x16/0x1b -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/480444 Title: packet storm with linux NFSv4 client when calling ftruncate() -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
