Hello, On beta1 ( ubuntu 3.13.0-14-generic), the problem is no more reproducible.
I repeated the similar test scenarios + a few new test scenarios. but no more call traces are seen in dmesg fsracer and stressaptest are running fine in parallel with no issues. we can close this bug for now and can reopen if we see the traces again in future. Thanks for all your support -- 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/1274479 Title: Call Traces found while executing fsracer tests Status in “linux” package in Ubuntu: Confirmed Bug description: Host machine : 9.3.189.114(roo/.pasroot) run "virsh console harini" to get the console access Description: ----------------- fs racer test from ltp test suite was being run on ubuntu alpha 1 guest. After couple of hours of testing got some errors on the command prompt along with call trace in dmesg. Location for fsracer test : /root/ltp- full-20140115/testcases/kernel/fs/racer/ Ran : nohup /root/ltp-full-20140115/testcases/kernel/fs/racer/fs_racer.sh -t 10000000 & ========================================================================================= On command prompt: --------------------------------- root@ubuntu:~# [88680.412397] INFO: task ln:16792 blocked for more than 120 seconds. [88680.412527] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.412595] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.412992] INFO: task mkdir:16801 blocked for more than 120 seconds. [88680.413079] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.413145] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.413290] INFO: task dd:17882 blocked for more than 120 seconds. [88680.413401] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.413468] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.413625] INFO: task fs_racer_file_c:29630 blocked for more than 120 seconds. [88680.413726] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.413793] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.414025] INFO: task fs_racer_file_c:29631 blocked for more than 120 seconds. [88680.414127] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.414196] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.414341] INFO: task ln:29635 blocked for more than 120 seconds. [88680.414425] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.414491] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.414632] INFO: task ln:29637 blocked for more than 120 seconds. [88680.414715] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.414782] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.415139] INFO: task fs_racer_file_c:29641 blocked for more than 120 seconds. [88680.415243] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.415311] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.415456] INFO: task mkdir:29646 blocked for more than 120 seconds. [88680.415539] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.415605] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.415748] INFO: task mkdir:29647 blocked for more than 120 seconds. [88680.415835] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.415983] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. ============================================================================== Call trace: ------------- [88680.412397] INFO: task ln:16792 blocked for more than 120 seconds. [88680.412527] Not tainted 3.13.0-5-generic #20-Ubuntu [88680.412595] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [88680.412696] ln D 00003fff9b89ea68 0 16792 25258 0x00040000 [88680.412703] Call Trace: [88680.412732] [c000000c76ad74b0] [c000000c765eeae0] 0xc000000c765eeae0 (unreliable) [88680.412852] [c000000c76ad7680] [c0000000000154c0] .__switch_to+0x1d0/0x340 [88680.412917] [c000000c76ad7730] [c000000000abd968] .__schedule+0x368/0x8c0 [88680.412922] [c000000c76ad79b0] [c000000000abe498] .schedule_preempt_disabled+0x18/0x30 [88680.412926] [c000000c76ad7a20] [c000000000ac078c] .__mutex_lock_slowpath+0x18c/0x2c0 [88680.412930] [c000000c76ad7af0] [c000000000ac0924] .mutex_lock+0x64/0x68 [88680.412975] [c000000c76ad7b70] [c0000000002303e0] .kern_path_create+0xb0/0x1e0 [88680.412979] [c000000c76ad7cd0] [c000000000232a48] .user_path_create+0x68/0xa0 [88680.412983] [c000000c76ad7d60] [c000000000233c88] .SyS_symlinkat+0x78/0x140 [88680.412989] [c000000c76ad7e30] [c000000000009e58] syscall_exit+0x0/0x98 =================================================================================== File system status at that moment -------------------------------------- root@ubuntu:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda 50G 18G 29G 39% / none 4.0K 0 4.0K 0% /sys/fs/cgroup devtmpfs 25G 8.0K 25G 1% /dev none 5.0G 216K 5.0G 1% /run none 5.0M 0 5.0M 0% /run/lock none 25G 0 25G 0% /run/shm none 100M 0 100M 0% /run/user root@ubuntu:~# root@ubuntu:~# uname -a Linux ubuntu 3.13.0-5-generic #20-Ubuntu SMP Mon Jan 20 20:03:57 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux root@ubuntu:~# --- ApportVersion: 2.13.2-0ubuntu2 Architecture: ppc64el CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. DistroRelease: Ubuntu 14.04 IwConfig: lo no wireless extensions. tunl0 no wireless extensions. eth0 no wireless extensions. Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Package: linux (not installed) ProcEnviron: TERM=vt102 PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: root=/dev/sda ProcModules: dm_crypt 29694 0 - Live 0xd000000006b36000 pseries_rng 3309 0 - Live 0xd000000006a7f000 rtc_generic 2711 0 - Live 0xd000000006a33000 ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0 RelatedPackageVersions: linux-restricted-modules-3.13.0-5-generic N/A linux-backports-modules-3.13.0-5-generic N/A linux-firmware 1.122 RfKill: Error: [Errno 2] No such file or directory Tags: trusty uec-images Uname: Linux 3.13.0-5-generic ppc64le UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True --- ApportVersion: 2.13.2-0ubuntu2 Architecture: ppc64el CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. DistroRelease: Ubuntu 14.04 IwConfig: lo no wireless extensions. tunl0 no wireless extensions. eth0 no wireless extensions. Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Package: linux (not installed) ProcEnviron: TERM=vt102 PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: root=/dev/sda ProcModules: dm_crypt 29694 0 - Live 0xd000000006b36000 pseries_rng 3309 0 - Live 0xd000000006a7f000 rtc_generic 2711 0 - Live 0xd000000006a33000 ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0 RelatedPackageVersions: linux-restricted-modules-3.13.0-5-generic N/A linux-backports-modules-3.13.0-5-generic N/A linux-firmware 1.122 RfKill: Error: [Errno 2] No such file or directory Tags: trusty uec-images Uname: Linux 3.13.0-5-generic ppc64le UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1274479/+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
