[<0>] ep_poll+0x348/0x3b0
[<0>] do_epoll_wait+0xb1/0xd0
[<0>] __x64_sys_epoll_wait+0x60/0x100
[<0>] do_syscall_64+0x5c/0x90
[<0>] entry_SYSCALL_64_after_hwframe+0x77/0xe1
