[tor-bugs] #10532 [Tor]: [Tor relay] Random hangs

Tor Bug Tracker & Wiki blackhole at torproject.org
Fri Jan 3 15:06:13 UTC 2014


#10532: [Tor relay] Random hangs
---------------------------+------------------------------
     Reporter:  mrc0mmand  |      Owner:
         Type:  defect     |     Status:  new
     Priority:  normal     |  Milestone:
    Component:  Tor        |    Version:  Tor: unspecified
   Resolution:             |   Keywords:
Actual Points:             |  Parent ID:
       Points:             |
---------------------------+------------------------------

Comment (by mrc0mmand):

 What I can see, RLIMIT_FSIZE is set to 'ulimited' and system has almost 7
 GB HDD space left. Unfortunately, I have no idea, how I could reproduce
 this problem in my env.
 Anyway, ~4 hours ago it happened again, I at least got a call trace log,
 maybe there could be something worthwhile in it.

 {{{
 [3120575.364013] tor             R  running task        0 17990      1
 0x00000084
 [3120575.364013]  ffff88001165b768 0000000000000082 ffff88001165bfd8
 0000000000014180
 [3120575.364013]  ffff88001165bfd8 0000000000014180 ffff88001f6da620
 ffff88001165a000
 [3120575.364013]  00000001b9fb9fa3 ffff88001165ba68 0000000000000001
 ffff88001ffe96c0
 [3120575.364013] Call Trace:
 [3120575.364013]  [<ffffffff810962e6>] __cond_resched+0x26/0x30
 [3120575.364013]  [<ffffffff8164c78a>] _cond_resched+0x3a/0x50
 [3120575.364013]  [<ffffffff8115af4d>] wait_iff_congested+0x6d/0x140
 [3120575.364013]  [<ffffffff81089420>] ? wake_up_atomic_t+0x30/0x30
 [3120575.364013]  [<ffffffff8114fb38>] shrink_inactive_list+0x228/0x4e0
 [3120575.364013]  [<ffffffff81150475>] shrink_lruvec+0x345/0x670
 [3120575.364013]  [<ffffffff81150806>] shrink_zone+0x66/0x1a0
 [3120575.364013]  [<ffffffff81150cf0>] do_try_to_free_pages+0xf0/0x590
 [3120575.364013]  [<ffffffff8114cfb4>] ?
 throttle_direct_reclaim.isra.40+0x84/0x270
 [3120575.364013]  [<ffffffff81151261>] try_to_free_pages+0xd1/0x170
 [3120575.364013]  [<ffffffff811459ea>] __alloc_pages_nodemask+0x69a/0xa30
 [3120575.364013]  [<ffffffff811830e9>] alloc_pages_current+0xa9/0x170
 [3120575.364013]  [<ffffffff81537600>] sk_page_frag_refill+0x70/0x160
 [3120575.364013]  [<ffffffff81591720>] tcp_sendmsg+0x2f0/0xdc0
 [3120575.364013]  [<ffffffff815baac4>] inet_sendmsg+0x64/0xb0
 [3120575.364013]  [<ffffffff8129a973>] ? selinux_socket_sendmsg+0x23/0x30
 [3120575.364013]  [<ffffffff81532e37>] sock_aio_write+0x137/0x150
 [3120575.364013]  [<ffffffff811a7a30>] do_sync_write+0x80/0xb0
 [3120575.364013]  [<ffffffff811a8235>] vfs_write+0x1b5/0x1e0
 [3120575.364013]  [<ffffffff811a8b79>] SyS_write+0x49/0xa0
 [3120575.364013]  [<ffffffff810e64f6>] ? __audit_syscall_exit+0x1f6/0x2a0
 [3120575.364013]  [<ffffffff81656919>] system_call_fastpath+0x16/0x1b
 [3120575.364013] tor             S ffff88001fc14180     0 19768      1
 0x00000080
 [3120575.364013]  ffff880001735b30 0000000000000082 ffff880001735fd8
 0000000000014180
 [3120575.364013]  ffff880001735fd8 0000000000014180 ffff88001c3acf40
 7fffffffffffffff
 [3120575.364013]  0000000000000000 ffff88001c3acf40 ffff880017e9a380
 ffff880017e9a678
 [3120575.364013] Call Trace:
 [3120575.364013]  [<ffffffff8164c3c9>] schedule+0x29/0x70
 [3120575.364013]  [<ffffffff8164a451>] schedule_timeout+0x201/0x2c0
 [3120575.364013]  [<ffffffff811ecc83>] ? ep_poll_callback+0xf3/0x160
 [3120575.364013]  [<ffffffff815ecd0e>] unix_stream_recvmsg+0x30e/0x850
 [3120575.364013]  [<ffffffff81089420>] ? wake_up_atomic_t+0x30/0x30
 [3120575.364013]  [<ffffffff81534328>] sock_recvmsg+0xa8/0xe0
 [3120575.364013]  [<ffffffff81533c69>] ? sock_sendmsg+0x99/0xd0
 [3120575.364013]  [<ffffffff811655e3>] ? handle_pte_fault+0x93/0xa70
 [3120575.364013]  [<ffffffff810982e6>] ? try_to_wake_up+0xe6/0x290
 [3120575.364013]  [<ffffffff8109ef87>] ? dequeue_entity+0x107/0x520
 [3120575.364013]  [<ffffffff8153448f>] SYSC_recvfrom+0xdf/0x160
 [3120575.364013]  [<ffffffff8164bf0a>] ? __schedule+0x2ba/0x750
 [3120575.364013]  [<ffffffff81534c0e>] SyS_recvfrom+0xe/0x10
 [3120575.364013]  [<ffffffff81656919>] system_call_fastpath+0x16/0x1b
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10532#comment:25>
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