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[Chris J Arges <1444003@xxxxxxxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Chris J Arges (arges)

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https://bugs.launchpad.net/bugs/1444003

Title:
  BUG: soft lockup - CPU#6 stuck for 22s! [systemd-udevd:166]

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Seeing a number of failed deployments on the SM15K:

  This is from console log for a failed deployment this morning:
  [ 3310.700695] Call Trace:^M
  [ 3310.700698] [<ffffffff81057180>] ? try_to_free_pmd_page+0x50/0x50^M
  [ 3310.700700] [<ffffffff8105709fff^M
  [ 3310.700707] [<ffffffff810590ed>] change_page_attr_set_clr+0x38d/0x4a0^M
  [ 3310.700709] [<ffffffffa020a000>] ? 0xffffffffa0209fff^M
  [ 3310.700711] [<ffffffff810596cf>] set_memory_ro+0x2f/0x40^M
  [ 3310.700714] [<ffffffff8171bad4>] set_section_ro_nx+0x3a/0x71^M
  [ 3310.700716] [<ffffffff810e25a8>] load_module+0x12c8/0x1b40^M
  [ 3310.700719] [<ffffffff810de040>] ? store_uevent+0x40/0x40^M
  [ 3310.700722] [<ffffffff810e2f96>] SyS_finit_module+0x86/0xb0^M
  [ 3310.700725] [<ffffffff8173263d>] system_call_fastpath+0x1a/0x1f^M
  [ 3310.700745] Code: 1d a9 29 00 3b 05 8f 90 c3 00 89 c2 0f 8d 25 fe ff ff 48 98 49 8b 4d 00 4p - CPU#2 stuck for 23s! [systemd-udevd:159]^M
  [ 3338.633651] Modules linked in: cryptd(+) e1000(+) ahci libahci^M
  [ 3338.633653] CPU: 2 PID: 159 Comm: systemd-udevd Not tainted 3.13.0-49-generic #81-Ubuntu^M
  [ 3338.633654] Hardware name: SeaMicro SM15000-64-CC-AA-1Ox1/AMD Server CRB, BIOS Estoc.3.72.19.0015 10/29/2012^M
  [ 3338.633655] task: ffff88022f361800 ti: ffff8800be95c000 task.ti: ffff8800be95c000^M
  [ 3338.633657] RIP: 0010:[<ffffffff810dc4ba>] [<ffffffff810dc4ba>] smp_call_function_many+0x26a/0x2d0^M
  [ 3338.633658] RSP: 0018:ffff8800be95db60 EFLAGS: 00000202^M
  [ 3338.633659] RAX: 0000000000000000 RBX: 000000000000ffff88023fc93fc8 R09: 0000000000000004^M
  [ 3338.633661] R10: ffff88023fc93fc8 R11: ffff880234259c28 R12: 000000000000061c^M
  [ 3338.633662] R13: ffff8802341caf80 R14: ffff8802342eb180 R15: 0000000000000000^M
  [ 3338.633663] FS: 00007f569e8ce880(0000) GS:ffff88023fc80000(0000) knlGS:0000000000000000^M
  [ 3338.633664] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033^M
  [ 3338.633665] CR2: 0000000002736138 CR3: 00000000be95b000 CR4: 00000000000407e0^M
  [ 3338.633666] Stack:^M
  [ 3338.633669] ffff88023fc93fe8 0000000000013f80 ffff8800be95dbe8 ffffffff8105c6e0^M
  [ 3338.633671] 0000010000000001 0000000000000012 ffffffff8105c6e0 fffffff8105c6e0>] ? rbt_memtype_copy_nth_element+0xa0/0xa0^M
  [ 3338.633680] [<ffffffff8105c6e0>] ? rbt_memtype_copy_nth_element+0xa0/0xa0^M
  [ 3338.633682] [<ffffffff810dc67d>] on_each_cpu+0x2d/0x60^M
  [ 3338.633685] [<ffffffff8105ccdd>] flush_tlb_kernel_range+0x6d/0x70^M
  [ 3338.633687] [<ffffffff81187555>] __purge_vmap_area_lazy+0x335/0x430^M
  [ 3338.633690] [<ffffffff811877b2>] vm_unmap_aliases+0x162/0x180^M
  [ 3338.633693] [<ffffffff81058e2e>] change_page_attr_set_clr+0xce/0x4a0^M
  [ 3338.633696] [<ffffffff81725ad1>] ? __schedule+0x381/0x7d0^M
  [ 3338.633699] [<ffffffff81059243>] set_memory_x+0x43/0x50^M
  [ 3338.633702] [<ff ? store_uevent+0x40/0x40^M
  [ 3338.633711] [<ffffffff810e2f96>] SyS_finit_module+0x86/0xb0^M
  [ 3338.633714] [<ffffffff8173263d>] system_call_fastpath+0x1a/0x1f^M
  [ 3338.633734] Code: 1d a9 29 00 3b 05 8f 90 c3 00 89 c2 0f 8d 25 fe ff ff 48 98 49 8b 4d 00 48 03 0c c5 20 37 d1 81 f6 41 20 01 74 cb 0f 1f 00 f3 90 <f6> 41 20 01 75 f8 eb be 0f b6 4d d0 48 8b 55 c0 44 89 ef 48 8b ^M
  [ 3338.701651] BUG: soft lockup - CPU#6 stuck for 22s! [systemd-udevd:166]^M
  [ 3338.701654] Modules linked in: cryptd(+) e1000(+) ahci libahci^M
  [ 3338.701655] CPU: 6 P^M

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