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[Launchpad Bug Tracker <1035855@xxxxxxxxxxxxxxxxxx>]

[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/1035855

Title:
  BUG: soft lockup - CPU#7 stuck for 23s! [netstat:12121]

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  Ubuntu 12.04 System running on Vmware ESXi 4.1.0
  No graphical gui installed, only cli
  Used as apache 2.2 server

  Sometimes system has very slow responsiveness ant it appears to be stuck....
  sometimes bash commands are very slow to execute, but no high cpu workload.

  WORKAROUND: Removed irqbalance daemon from ubuntu server and unchecked
  "Synchronize guest time with host" from VM setting (VMWare esx).

  [152312.575871] BUG: soft lockup - CPU#7 stuck for 23s! [netstat:12121]
  [152313.161642] Modules linked in: xt_multiport pcnet32 vmxnet(O) vmblock(O) vmsync(O) vmhgfs(O) ext2 dm_crypt ip6t_LOG xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT ipt_LOG xt_limit xt_tcpudp xt_addrtype xt_state ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat ppdev nf_conntrack_ipv4 nf_defrag_ipv4 vmw_balloon nf_conntrack_ftp nf_conntrack psmouse iptable_filter ip_tables serio_raw x_tables parport_pc acpi_memhotplug lp parport vmci(O) vmxnet3 vmw_pvscsi floppy
  [152314.013007] CPU 7
  [152314.013010] Modules linked in: xt_multiport pcnet32 vmxnet(O) vmblock(O) vmsync(O) vmhgfs(O) ext2 dm_crypt ip6t_LOG xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT ipt_LOG xt_limit xt_tcpudp xt_addrtype xt_state ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat ppdev nf_conntrack_ipv4 nf_defrag_ipv4 vmw_balloon nf_conntrack_ftp nf_conntrack psmouse iptable_filter ip_tables serio_raw x_tables parport_pc acpi_memhotplug lp parport vmci(O) vmxnet3 vmw_pvscsi floppy
  [152314.059941]
  [152314.167091] Pid: 12121, comm: netstat Tainted: G        W  O 3.2.0-29-virtual #46-Ubuntu VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
  [152314.176641] RIP: 0010:[<ffffffff8158f80a>]  [<ffffffff8158f80a>] established_get_first+0x4a/0x130
  [152314.571870] RSP: 0018:ffff8801604bfdd8  EFLAGS: 00010286
  [152314.571874] RAX: ffffc90011625000 RBX: ffff0014ff0a0000 RCX: 000000000007a300
  [152314.571876] RDX: 000000000007a300 RSI: ffff88017570b000 RDI: 00000000000003ff
  [152314.571878] RBP: ffff8801604bfdf8 R08: 000000000000000a R09: 000000000000ffff
  [152314.571881] R10: 0000000000000000 R11: 000000000000000f R12: ffff88016e6c736f
  [152314.571883] R13: 0000000000000c91 R14: 0000000000000001 R15: 0000000000000064
  [152314.571898] FS:  00007f2a1bc11700(0000) GS:ffff88017fce0000(0000) knlGS:0000000000000000
  [152314.571901] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [152314.571903] CR2: 0000000000415f95 CR3: 0000000173f8a000 CR4: 00000000000006e0
  [152314.575447] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  [152314.575455] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  [152314.575460] Process netstat (pid: 12121, threadinfo ffff8801604be000, task ffff88016009db80)
  [152314.575469] Stack:
  [152314.575707]  ffff880010ad7e80 ffff880176706080 ffff880010ad7e80 ffff8801604bfe70
  [152314.575717]  ffff8801604bfe28 ffffffff8158fbcd ffff880176706080 ffff880162ac4100
  [152314.625435]  ffff880176706080 ffff880160a56c00 ffff8801604bfea8 ffffffff81197040
  [152314.625442] Call Trace:
  [152314.689030]  [<ffffffff8158fbcd>] tcp_seq_next+0x8d/0xa0
  [152314.862618]  [<ffffffff81197040>] seq_read+0x280/0x3d0
  [152314.865463]  [<ffffffff81196dc0>] ? seq_lseek+0x100/0x100
  [152315.105409]  [<ffffffff811d3b42>] proc_reg_read+0x82/0xc0
  [152315.218963]  [<ffffffff81174dd0>] vfs_read+0xb0/0x180
  [152315.218981]  [<ffffffff81174eea>] sys_read+0x4a/0x90
  [152315.304275]  [<ffffffff8165ad42>] system_call_fastpath+0x16/0x1b
  [152315.304287] Code: 98 00 4c 8b 23 c7 43 1c 00 00 00 00 89 d1 72 41 48 63 c1 48 8b 35 cf d7 98 00 8b 3d d5 d7 98 00 48 c1 e0 04 48 03 05 b6 d7 98 00 <f6> 00 01 74 31 f6 40 08 01 74 2b 8d 4a 01 3b 0d b2 d7 98 00 89
  [152315.694936] Call Trace:
  [152315.703635]  [<ffffffff8158fbcd>] tcp_seq_next+0x8d/0xa0
  [152315.703644]  [<ffffffff81197040>] seq_read+0x280/0x3d0
  [152315.703648]  [<ffffffff81196dc0>] ? seq_lseek+0x100/0x100
  [152315.761426]  [<ffffffff811d3b42>] proc_reg_read+0x82/0xc0
  [152315.820263]  [<ffffffff81174dd0>] vfs_read+0xb0/0x180
  [152315.820279]  [<ffffffff81174eea>] sys_read+0x4a/0x90
  [152315.844874]  [<ffffffff8165ad42>] system_call_fastpath+0x16/0x1b
  [

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-29-virtual 3.2.0-29.46
  ProcVersionSignature: Ubuntu 3.2.0-29.46-virtual 3.2.24
  Uname: Linux 3.2.0-29-virtual x86_64
  AlsaDevices:
   total 0
   crw-rw---T 1 root audio 116,  1 ago 10 16:01 seq
   crw-rw---T 1 root audio 116, 33 ago 10 16:01 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Sun Aug 12 13:58:22 2012
  HibernationDevice: RESUME=UUID=81e999c9-8d50-47cf-8d54-a25629143f72
  InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
  MachineType: VMware, Inc. VMware Virtual Platform
  PciMultimedia:

  ProcFB:

  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-29-virtual root=/dev/mapper/h30server2-root ro crashkernel=384M-2G:64M,2G-:128M quiet
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-29-virtual N/A
   linux-backports-modules-3.2.0-29-virtual  N/A
   linux-firmware                            1.79
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-05-10 (93 days ago)
  dmi.bios.date: 04/15/2011
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 6.00
  dmi.board.name: 440BX Desktop Reference Platform
  dmi.board.vendor: Intel Corporation
  dmi.board.version: None
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd04/15/2011:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
  dmi.product.name: VMware Virtual Platform
  dmi.product.version: None
  dmi.sys.vendor: VMware, Inc.

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