apport information ** Attachment added: "ProcInterrupts.txt" https://bugs.launchpad.net/bugs/1874266/+attachment/5358074/+files/ProcInterrupts.txt
-- 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/1874266 Title: Intensive NFS operations could lock whole system Status in linux package in Ubuntu: Confirmed Bug description: After last update from kernel version 4.4.0-176-generic to 4.4.0-177-generic my machine which does repository mirrors on NFS filesystem hung. After hang the system is pingable, and all processes run well until they need to perform IO operation. Then they end in 'D' state. If dmesg -w -H is run prior to hang you could get following report: [Apr22 16:06] INFO: task find:986 blocked for more than 120 seconds. [ +0.000034] Not tainted 4.4.0-177-generic #207-Ubuntu [ +0.000013] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ +0.000024] find D f4bbdd2c 0 986 721 0x00000000 [ +0.000010] f4bbdd1c 00000086 41ed78a0 f4bbdd2c eb5b7844 c1b36ec0 95907572 00000025 [ +0.000003] f4eb7e00 c1b1da80 f3ab6e00 f4bbe000 f3ab6e00 f53ae3a8 f4bbdd28 c17ec5cd [ +0.000002] 000001ff f4bbdd78 c11a8b57 f4bbdd3c f87bb75b f76ae800 f4bbdd50 f87b2bdd [ +0.000002] Call Trace: [ +0.000006] [<c17ec5cd>] schedule+0x2d/0x80 [ +0.000012] [<c11a8b57>] kmap_high+0x117/0x290 [ +0.000013] [<f87bb75b>] ? nfs_revalidate_inode_rcu+0x1b/0x40 [nfs] [ +0.000005] [<f87b2bdd>] ? nfs_check_verifier+0x6d/0x80 [nfs] [ +0.000004] [<c11d2c95>] ? kmem_cache_alloc_trace+0x185/0x1e0 [ +0.000012] [<c109ee50>] ? wake_up_q+0x70/0x70 [ +0.000003] [<c106bec0>] kmap+0x40/0x50 [ +0.000006] [<f87b4e0d>] nfs_readdir_xdr_to_array+0xdd/0x370 [nfs] [ +0.000005] [<f87b6835>] ? nfs4_lookup_revalidate+0x25/0x140 [nfs] [ +0.000002] [<c11e4d62>] ? mem_cgroup_commit_charge+0x62/0xe0 [ +0.000011] [<f87b50bb>] nfs_readdir_filler+0x1b/0x80 [nfs] [ +0.000002] [<c117e3b2>] do_read_cache_page+0x102/0x190 [ +0.000019] [<f87b50a0>] ? nfs_readdir_xdr_to_array+0x370/0x370 [nfs] [ +0.000002] [<c117e464>] read_cache_page+0x24/0x30 [ +0.000004] [<f87b5261>] nfs_readdir+0x141/0x740 [nfs] [ +0.000003] [<c13d21b6>] ? _copy_to_user+0x26/0x30 [ +0.000002] [<c135fba5>] ? common_file_perm+0x55/0x1b0 [ +0.000016] [<fbaac1c0>] ? nfs4_xdr_dec_fsinfo+0x80/0x80 [nfsv4] [ +0.000003] [<c1201c2e>] iterate_dir+0x8e/0x130 [ +0.000002] [<c120bde2>] ? set_close_on_exec+0x62/0x70 [ +0.000002] [<c120224d>] SyS_getdents64+0x6d/0xf0 [ +0.000001] [<c1201e10>] ? filldir+0x140/0x140 [ +0.000002] [<c100397f>] do_fast_syscall_32+0x9f/0x190 [ +0.000011] [<c17f08b0>] sysenter_past_esp+0x3d/0x61 [ +0.000002] INFO: task bash:1065 blocked for more than 120 seconds. [ +0.000015] Not tainted 4.4.0-177-generic #207-Ubuntu [ +0.000020] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ +0.000018] bash D 00000017 0 1065 760 0x00000000 [ +0.000002] f1b87e44 00000086 c11a799b 00000017 00000000 f1f1eff8 b37c5095 00000025 [ +0.000003] f4eb7e00 c1b1da80 f3ab3c00 f1b88000 f3ab3c00 f53b0298 f1b87e50 c17ec5cd [ +0.000002] 000001ff f1b87ea0 c11a8b57 f3ab3c00 f3131000 f3ab3c00 00000001 00000000 [ +0.000002] Call Trace: [ +0.000003] [<c11a799b>] ? follow_page_mask+0x16b/0x290 [ +0.000001] [<c17ec5cd>] schedule+0x2d/0x80 [ +0.000001] [<c11a8b57>] kmap_high+0x117/0x290 [ +0.000002] [<c109ee50>] ? wake_up_q+0x70/0x70 [ +0.000001] [<c106bec0>] kmap+0x40/0x50 [ +0.000002] [<c11f4ae8>] copy_strings+0x1f8/0x2d0 [ +0.000002] [<c11f4be6>] copy_strings_kernel+0x26/0x30 [ +0.000001] [<c11f5b29>] do_execveat_common+0x479/0x6f0 [ +0.000002] [<c11fd62a>] ? getname_flags+0x3a/0x1a0 [ +0.000001] [<c11f5fb4>] SyS_execve+0x34/0x40 [ +0.000002] [<c100397f>] do_fast_syscall_32+0x9f/0x190 [ +0.000002] [<c17f08b0>] sysenter_past_esp+0x3d/0x61 I did NOT noticed such behaviour on x86_64 architecture, only on i386. --- AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-177-generic. AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.20.1-0ubuntu2.23 Architecture: i386 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory Card0.Amixer.values: Error: [Errno 2] No such file or directory DistroRelease: Ubuntu 16.04 IwConfig: Error: [Errno 2] No such file or directory Lsusb: Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: innotek GmbH VirtualBox Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 vboxdrmfb ProcKernelCmdLine: root=/dev/sda2 quiet splash ProcVersionSignature: Ubuntu 4.4.0-177.207-generic 4.4.214 RelatedPackageVersions: linux-restricted-modules-4.4.0-177-generic N/A linux-backports-modules-4.4.0-177-generic N/A linux-firmware 1.157.22 RfKill: Error: [Errno 2] No such file or directory Tags: xenial xenial Uname: Linux 4.4.0-177-generic i686 UnreportableReason: The report belongs to a package that is not installed. UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: False dmi.bios.date: 12/01/2006 dmi.bios.vendor: innotek GmbH dmi.bios.version: VirtualBox dmi.board.name: VirtualBox dmi.board.vendor: Oracle Corporation dmi.board.version: 1.2 dmi.chassis.type: 1 dmi.chassis.vendor: Oracle Corporation dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr: dmi.product.name: VirtualBox dmi.product.version: 1.2 dmi.sys.vendor: innotek GmbH To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874266/+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
