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[Rafael David Tinoco <rafael.tinoco@xxxxxxxxxxxxx>]

For the other back trace (the one I have the core and can use crash tool): 
* I'm still analysing this... 

PID: 4453 TASK: ffff8800362dddc0 CPU: 16 COMMAND: "git" 
#0 [ffff880092791a60] machine_kexec at ffffffff8104b141 
#1 [ffff880092791ad0] crash_kexec at ffffffff810d5a58 
#2 [ffff880092791ba0] oops_end at ffffffff81748b38 
#3 [ffff880092791bd0] no_context at ffffffff8172dd02 
#4 [ffff880092791c20] __bad_area_nosemaphore at ffffffff8172dee4 
#5 [ffff880092791c80] bad_area_nosemaphore at ffffffff8172df16 
#6 [ffff880092791c90] __do_page_fault at ffffffff8174bc12 
#7 [ffff880092791da0] do_page_fault at ffffffff8174bde7 
#8 [ffff880092791dd0] page_fault at ffffffff81747e98 
[exception RIP: kmem_cache_alloc+102] 
RIP: ffffffff8119c316 RSP: ffff880092791e88 RFLAGS: 00010286 
RAX: 0000000000000000 RBX: ffffffffffffffea RCX: 00000000260000be 
RDX: 00000000260000bd RSI: 00000000000000d0 RDI: 00000000000173c0 
RBP: ffff880092791ed8 R8: ffff880c0bb173c0 R9: 0000000000001165 
R10: 00007f2e4ac88dcc R11: 0000000000000246 R12: ffff880c0b403800 
R13: ffff880ce78ccc00 R14: ffffffff8108f636 R15: 00000000000000d0 
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 
#9 [ffff880092791ee0] prepare_creds at ffffffff8108f636 
#10 [ffff880092791f00] sys_faccessat at ffffffff811b22b4 
#11 [ffff880092791f70] sys_access at ffffffff811b24b8 
#12 [ffff880092791f80] system_call_fastpath at ffffffff8175099d 
RIP: 00007f2e4d883097 RSP: 00007f2e4ac87c88 RFLAGS: 00000206 
RAX: 0000000000000015 RBX: ffffffff8175099d RCX: ffffffffffffffff 
RDX: 00000000007bde07 RSI: 0000000000000000 RDI: 00000000007bdd80 
RBP: 0000000000000001 R8: 0000000000000066 R9: 0000000000001165 
R10: 00007f2e4ac88dcc R11: 0000000000000246 R12: ffffffff811b24b8 
R13: ffff880092791f78 R14: 0000000000000002 R15: 0000000000000000 
ORIG_RAX: 0000000000000015 CS: 0033 SS: 002b 

We can see that ... system call access (which calls sys_faccessat) was
called by user mode (CS: 0033) to check wether this process has
permission to handle the given file:

FD FILE DENTRY INODE TYPE PATH 
3 ffff880be925be00 ffff88076dd34b40 ffff88082a8434b0 REG /home001/jeongku.choi/8994_recent/.repo/project-objects/LG_apps/android/vendor/lge/apps/LGSettings.git/objects/pack/tmp_p 

You can check that the file descriptor ffff880be925be00 is present into
frame #10 (because it is an argument to the system call and was pushed
into stack):

#10 [ffff880092791f00] sys_faccessat at ffffffff811b22b4 
ffff880092791f08: 0000000000000001 00007f2e30001050 
ffff880092791f18: ffff880be925be00 0000000000000000 
ffff880092791f28: ffff880092791f78 ffffffff811b46b6 
ffff880092791f38: 00007f2e4ac87d00 00007f2e4cce9590 
ffff880092791f48: 00007f2e4cce9590 0000000000000457 
ffff880092791f58: 0000000000000000 0000000000000002 
ffff880092791f68: ffff880092791f78 ffffffff811b24b8 

To check this file's permission... continuing on the backtrace... (next
comment)

-- 
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https://bugs.launchpad.net/bugs/1389787

Title:
  3.11 memory consumption leads to HANG (not sure if 3.13 suffers from
  this).

Status in “linux” package in Ubuntu:
  New

Bug description:
  It was brought to my attention the following stack traces (occurring
  several times on different machines):

  crash> bt 
  PID: 2877 TASK: ffff881009b42ee0 CPU: 1 COMMAND: "git" 
  #0 [ffff880c0c6bb9d0] machine_kexec at ffffffff8104b141 
  #1 [ffff880c0c6bba40] crash_kexec at ffffffff810d5a58 
  #2 [ffff880c0c6bbb10] oops_end at ffffffff81748b38 
  #3 [ffff880c0c6bbb40] no_context at ffffffff8172dd02 
  #4 [ffff880c0c6bbb90] __bad_area_nosemaphore at ffffffff8172dee4 
  #5 [ffff880c0c6bbbf0] bad_area at ffffffff8172df5d 
  #6 [ffff880c0c6bbc20] __do_page_fault at ffffffff8174bda8 
  #7 [ffff880c0c6bbd30] do_page_fault at ffffffff8174bde7 
  #8 [ffff880c0c6bbd60] page_fault at ffffffff81747e98 
  [exception RIP: kmem_cache_alloc_trace+106] 
  RIP: ffffffff8119b22a RSP: ffff880c0c6bbe18 RFLAGS: 00010206 
  RAX: 0000000000000000 RBX: ffff88008407e0c0 RCX: 00000000031b6bc9 
  RDX: 00000000031b6bc8 RSI: 00000000000080d0 RDI: 00000000000173c0 
  RBP: ffff880c0c6bbe68 R8: ffff88081fa373c0 R9: 0000000000000000 
  R10: 0000000000000000 R11: 0000000000000202 R12: ffff88081f403800 
  R13: 0000000000629050 R14: ffffffff811bcfe4 R15: 00000000000080d0 
  ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 
  #9 [ffff880c0c6bbe70] alloc_pipe_info at ffffffff811bcfe4 
  #10 [ffff880c0c6bbe90] get_pipe_inode at ffffffff811bd0aa 
  #11 [ffff880c0c6bbeb0] create_pipe_files at ffffffff811bd648 
  #12 [ffff880c0c6bbef0] __do_pipe_flags at ffffffff811bd7d2 
  #13 [ffff880c0c6bbf30] sys_pipe2 at ffffffff811bd8f0 
  #14 [ffff880c0c6bbf70] sys_pipe at ffffffff811bd980 
  #15 [ffff880c0c6bbf80] system_call_fastpath at ffffffff8175099d 
  RIP: 00007f2d245da7e7 RSP: 00007fff6a4cfb18 RFLAGS: 00010283 
  RAX: 0000000000000016 RBX: ffffffff8175099d RCX: 000000000000001c 
  RDX: 00007f2d248aeac0 RSI: 0000000000000000 RDI: 00007fff6a4cfad0 
  RBP: 0000000000000002 R8: 0000000000000000 R9: 0000000000000000 
  R10: 0000000000000000 R11: 0000000000000202 R12: ffffffff811bd980 
  R13: ffff880c0c6bbf78 R14: 0000000000000000 R15: 000000000232efc0 
  ORIG_RAX: 0000000000000016 CS: 0033 SS: 002b

  AND

  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152703] SysRq : Show backtrace of all active CPUs 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152708] sending NMI to all CPUs: 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152714] NMI backtrace for cpu 0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152720] CPU: 0 PID: 13579 Comm: python Tainted: GF I 3.11.0-15-generic #25~precise1-Ubuntu 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152721] Hardware name: HP ProLiant BL460c G7, BIOS I27 05/05/2011 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152724] task: ffff880085f50000 ti: ffff880a64afa000 task.ti: ffff880a64afa000 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152725] RIP: 0010:[<ffffffff81050ff5>] [<ffffffff81050ff5>] __ticket_spin_lock+0x25/0x30 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152736] RSP: 0018:ffff880a64afb748 EFLAGS: 00000293 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152737] RAX: 000000000000db25 RBX: ffff880be8576480 RCX: 000000018066002a 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152739] RDX: 000000000000db2e RSI: 0000000000000001 RDI: ffff880be8576480 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152740] RBP: ffff880a64afb748 R08: 0000000000000000 R09: ffffea002407db00 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152741] R10: ffffffff8128d8ed R11: 0000000000000001 R12: ffff8807572480b0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152743] R13: ffff8807572481b8 R14: 00000000ffffffff R15: ffff8805e9c77908 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152745] FS: 00007ff00d4db700(0000) GS:ffff880c0ba00000(0000) knlGS:0000000000000000 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152746] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152748] CR2: 00007fb66906d8e0 CR3: 000000053b3dd000 CR4: 00000000000007f0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152749] Stack: 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152750] ffff880a64afb758 ffffffff8174759e ffff880a64afb778 ffffffff8128eb02 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152756] ffff8807572480b0 ffff880757248200 ffff880a64afb798 ffffffff81270595 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152759] ffff880a64afb798 ffff8807572480b0 ffff880a64afb7c8 ffffffff81257621 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152763] Call Trace: 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152770] [<ffffffff8174759e>] _raw_spin_lock+0xe/0x20 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152776] [<ffffffff8128eb02>] ext4_es_lru_del+0x32/0x80 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152781] [<ffffffff81270595>] ext4_clear_inode+0x45/0x90 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152786] [<ffffffff81257621>] ext4_evict_inode+0x81/0x510 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152792] [<ffffffff811ce490>] evict+0xc0/0x1d0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152795] [<ffffffff811ce5e1>] dispose_list+0x41/0x50 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152797] [<ffffffff8174756f>] ? _raw_spin_trylock+0xf/0x30 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152800] [<ffffffff811cf5d5>] prune_icache_sb+0x185/0x340 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152806] [<ffffffff811b7703>] prune_super+0x193/0x1b0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152812] [<ffffffff8115af04>] shrink_slab+0x154/0x300 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152816] [<ffffffff8115dbf8>] do_try_to_free_pages+0x218/0x290 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152819] [<ffffffff8115dfa4>] try_to_free_pages+0xe4/0x1a0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152823] [<ffffffff811520b8>] __alloc_pages_nodemask+0x618/0x9a0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152827] [<ffffffff817336c8>] ? mem_cgroup_update_tree+0x9c/0x121 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152831] [<ffffffff811920a3>] alloc_pages_vma+0xa3/0x150 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152837] [<ffffffff81170249>] do_wp_page+0xc9/0x7c0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152840] [<ffffffff81172d8c>] handle_pte_fault+0x1ec/0x230 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152842] [<ffffffff81173ff0>] handle_mm_fault+0x2a0/0x3e0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152847] [<ffffffff8174b9ff>] __do_page_fault+0x1af/0x560 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152850] [<ffffffff811b8de7>] ? cp_new_stat+0x107/0x120 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152856] [<ffffffff810ca06c>] ? do_futex+0x7c/0x1b0 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152858] [<ffffffff811b91b5>] ? SYSC_newstat+0x25/0x30 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152861] [<ffffffff8174bde7>] do_page_fault+0x37/0x70 
  Oct 15 14:19:08 LGEARND8B5 kernel: [796493.152864] [<ffffffff81747e98>] page_fault+0x28/0x30

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