[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2015-04-06 Thread Launchpad Bug Tracker
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
   Status: Incomplete = Expired

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https://bugs.launchpad.net/bugs/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in linux package in Ubuntu:
  Expired

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: Removed 

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2015-02-02 Thread Chris J Arges
Can you re-test with the latest 3.16 kernel to see if this is still an issue?
Thanks,

** Changed in: linux (Ubuntu)
   Status: Triaged = Incomplete

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: 

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2015-01-15 Thread Chris J Arges
** Changed in: linux (Ubuntu)
 Assignee: Chris J Arges (arges) = (unassigned)

** Changed in: linux (Ubuntu)
   Status: In Progress = Triaged

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in linux package in Ubuntu:
  Triaged

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: 

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2014-12-12 Thread bugproxy
** Tags removed: targetmilestone-inin1410
** Tags added: targetmilestone-inin1504

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in linux package in Ubuntu:
  In Progress

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: Removed session c1.
  [32950.694697] systemd-logind[1071]: New session 

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2014-11-20 Thread Chris J Arges
** Changed in: linux (Ubuntu)
 Assignee: (unassigned) = Chris J Arges (arges)

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: Removed session c1.
  [32950.694697] systemd-logind[1071]: New session 

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2014-11-20 Thread Chris J Arges
** Changed in: linux (Ubuntu)
   Status: Triaged = In Progress

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in “linux” package in Ubuntu:
  In Progress

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: Removed session c1.
  [32950.694697] systemd-logind[1071]: New session c2 of user 

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2014-09-24 Thread bugproxy
** Tags removed: severity-critical
** Tags added: severity-high

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: Removed session c1.
  [32950.694697] systemd-logind[1071]: New session c2 of user root.
  

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2014-09-24 Thread Chris J Arges
Per Andy's comment, please do upgrade to the latest 3.16 series kernel 
(3.16.0-17.23) and see if this issue still occurs.
Thanks,

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: Removed session c1.
  

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2014-08-20 Thread Andy Whitcroft
There is a strong possibility the dcache related panics are associated
with the fixes applied for bug #1354234.  It would be worth testing with
kernels with those fixes applied for confirmation.

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2014-08-19 Thread Joseph Salisbury
** Changed in: linux (Ubuntu)
   Importance: Undecided = Medium

** Changed in: linux (Ubuntu)
   Status: Incomplete = Triaged

** Tags added: ppc64el

** Tags added: kernel-da-key

** Changed in: linux (Ubuntu)
   Importance: Medium = High

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic 

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2014-08-15 Thread Luciano Chavez
** Package changed: ubuntu = linux (Ubuntu)

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: Removed session c1.
  [32950.694697] systemd-logind[1071]: New session c2 of user root.
  [32950.703411] 

[Kernel-packages] [Bug 1354024] Re: Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel bug

2014-08-15 Thread bugproxy
** Tags removed: targetmilestone-inin---
** Tags added: targetmilestone-inin1410

-- 
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/1354024

Title:
  Running YCSB workload on MongoDB on Ubuntu 14.10 VM resulted in kernel
  bug

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  == Comment: #0 - Kalpana Shetty kalsh...@in.ibm.com - 2014-08-05 23:53:28 ==
  ---Problem Description---
  Running YCSB workload on LongoDB on Ubuntu 14.10 VM resulted in kernel bug
   
  ---uname output---
  root@u10vm15:~# uname -a Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon 
Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
   
  ---Additional Hardware Info---
  Power 8 - Tuleta 

   Machine Type = POWER 8 
   
  ---System Hang---
   Ubuntu 14.10 LE guest needs to be restarted when seen this issue.
   
   Steps to reproduce:
  - Install Ubuntu 14.10 on 2 VMs(July 30th build)
  - Run Mongodb 2.6.2 on one of PowerKVM VM 
  - Run YCSB 0.1.4 on other VM
  - Create 1million record load on MongoDB using YCSB;  allow it to run for 4 
to 5 hours or so. 

  Setup details:
  - MongoDB server on one VM (version: 2.6.2)
  - YCSB workload running on one VM (YCSB version - ycsb-0.1.4)

  uname on Host:
  [root@powerkvm5-lp1 ~]# uname -a
  Linux powerkvm5-lp1.austin.ibm.com 3.10.42-2004.pkvm2_1_1.8.ppc64 #1 SMP Fri 
Jul 18 11:20:03 CDT 2014 ppc64 ppc64 ppc64 GNU/Linux

  uname on Guest OS:
  root@u10vm15:~# uname -a
  Linux u10vm15 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 
ppc64le ppc64le ppc64le GNU/Linux

  [23001.071911] [ cut here ]
  [23001.071922] kernel BUG at /build/buildd/linux-3.16.0/fs/dcache.c:1626!
  [23001.072917] Oops: Exception in kernel mode, sig: 5 [#1]
  [23001.073620] SMP NR_CPUS=2048 NUMA pSeries
  [23001.074149] Modules linked in: pseries_rng rtc_generic ohci_pci
  [23001.075162] CPU: 8 PID: 3384 Comm: updatedb.mlocat Not tainted 
3.16.0-6-generic #11-Ubuntu
  [23001.076006] task: c6e0 ti: c00130364000 task.ti: 
c00130364000
  [23001.076834] NIP: c02abc68 LR: c02abf90 CTR: 
c001f880
  [23001.077650] REGS: c001303676d0 TRAP: 0700   Not tainted  
(3.16.0-6-generic)
  [23001.078468] MSR: 800100029033 SF,EE,ME,IR,DR,RI,LE  CR: 24004842  
XER: 2000
  [23001.080432] CFAR: c02abf8c SOFTE: 1 
  [23001.080432] GPR00: c02abf90 c00130367950 c1346618 
c5dd 
  [23001.080432] GPR04:  1000 c5dcd170 
0fcc 
  [23001.080432] GPR08: 1000 0001 8803dabf05ff 
0016eb0c 
  [23001.080432] GPR12: 4400 cfe41c00  
0010 
  [23001.080432] GPR16: 1001d660 010034e94ec0 0001 
53d94034 
  [23001.080432] GPR20:  0001 3fffcaa1efb8 
010034e842e0 
  [23001.080432] GPR24:   010034e94ec0 
ff9c 
  [23001.080432] GPR28: 0040  c5dd 
 
  [23001.091266] NIP [c02abc68] d_instantiate+0x38/0xf0
  [23001.091837] LR [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.092404] Call Trace:
  [23001.092692] [c00130367980] [c02abf90] d_splice_alias+0x60/0x1a0
  [23001.093544] [c001303679c0] [c034c5b4] ext4_lookup+0xc4/0x1c0
  [23001.094399] [c00130367a50] [c0299944] lookup_real+0x64/0xc0
  [23001.095261] [c00130367a90] [c029a790] __lookup_hash+0x60/0x80
  [23001.096106] [c00130367ae0] [c029d610] lookup_slow+0x70/0x110
  [23001.096946] [c00130367b20] [c029ea08] path_lookupat+0x958/0x9a0
  [23001.097804] [c00130367be0] [c029eaa8] 
filename_lookup+0x58/0x140
  [23001.098648] [c00130367c30] [c02a2524] 
user_path_at_empty+0x84/0xe0
  [23001.099580] [c00130367d20] [c02937e4] vfs_fstatat+0x84/0x140
  [23001.100432] [c00130367d80] [c0293eb4] SyS_newlstat+0x34/0x60
  [23001.101378] [c00130367e30] [c000a0fc] syscall_exit+0x0/0x7c
  [23001.102193] Instruction dump:
  [23001.102589] 7c0802a6 fbc1fff0 fbe1fff8 f8010010 f821ffd1 7c7e1b78 7c9f2378 
6000 
  [23001.103945] 6000 e93e00b8 3149 7d2a4910 0b09 2fbf 
419e0060 387f0088 
  [23001.105276] ---[ end trace b20dd6fbb5b21932 ]---
  [23001.118598] 
  root@u10vm15:~# 

  After I rebooted I'm keep seeing below call traces:
  Ubuntu Utopic Unicorn (development branch) u10vm15 hvc0

  u10vm15 login: root
  Password: 
  Last login: Wed Aug  6 00:02:18 IST 2014 on hvc0
  Welcome to Ubuntu Utopic Unicorn (development branch) (GNU/Linux 
3.16.0-6-generic ppc64le)

   * Documentation:  https://help.ubuntu.com/
  [32950.678160] systemd-logind[1071]: Removed session c1.
  [32950.694697] systemd-logind[1071]: New session