[SR-Users] async workers causing unexplained high load average

[Alex Balashov]

I also find this in 'dmesg' about the async workers periodically:

INFO: task kamailio:4480 blocked for more than 120 seconds.
       Not tainted 2.6.32-431.29.2.el6.x86_64 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kamailio      D 0000000000000001     0  4480   4458 0x00000080
  ffff880037b1db28 0000000000000082 ffff880037b1dbb8 ffffffff8112f183
  ffff88000001dd80 0000000000000002 ffff880037b1dac8 ffffffff8109b39c
  ffff8800a6069058 ffff880037b1dfd8 000000000000fbc8 ffff8800a6069058
Call Trace:
  [<ffffffff8112f183>] ? __alloc_pages_nodemask+0x113/0x8d0
  [<ffffffff8109b39c>] ? remove_wait_queue+0x3c/0x50
  [<ffffffff8152a5be>] __mutex_lock_slowpath+0x13e/0x180
  [<ffffffff8152a45b>] mutex_lock+0x2b/0x50
  [<ffffffff814f668a>] unix_dgram_recvmsg+0x7a/0x4d0
  [<ffffffff8144a923>] sock_recvmsg+0x133/0x160
  [<ffffffff8109afa0>] ? autoremove_wake_function+0x0/0x40
  [<ffffffff8114b00a>] ? handle_mm_fault+0x22a/0x300
  [<ffffffff8104a98c>] ? __do_page_fault+0x1ec/0x480
  [<ffffffff8144aa9e>] sys_recvfrom+0xee/0x180
  [<ffffffff810e1e07>] ? audit_syscall_entry+0x1d7/0x200
  [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b


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Alex Balashov - Principal
Evariste Systems LLC
Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/

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