Soft lockup in __do_rt_garbage_collect
Issue
- Soft lockup in
__do_rt_garbage_collect - Soft lockup panics on several systems running busy TPROXY
- System performs a panic on softlockup with backtrace similar to:
#9 [ffff880874783d08] apic_timer_interrupt at ffffffff8100bb93
[exception RIP: _spin_lock+0x21]
RAX: 0000000000001c66
RDX: 0000000000001c65
#10 [ffff880874783db8] __do_rt_garbage_collect at ffffffff8149020f
#11 [ffff880874783e28] __rt_garbage_collect at ffffffff814905ea
#12 [ffff880874783e38] worker_thread at ffffffff81097fe0
#13 [ffff880874783ee8] kthread at ffffffff8109e66e
#14 [ffff880874783f48] kernel_thread at ffffffff8100c20a
Environment
- Red Hat Enterprise Linux 6.6 (kernel series
2.6.32-504.el6) or earlier - Network usage with many IP routes such as proxy or router
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