https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77538
--- Comment #3 from peien luo <coollpe at hotmail dot com> --- The process stuck can be reproduced, the kernel call trace is like: Sep 16 09:38:37 localhost kernel: test_metaserver D ffff8803f9307300 0 4250 3896 0x00000080 Sep 16 09:38:37 localhost kernel: ffff880424b4bcd0 0000000000000082 ffff8803f9307300 ffff880424b4bfd8 Sep 16 09:38:37 localhost kernel: ffff880424b4bfd8 ffff880424b4bfd8 ffff8803f9307300 ffff8803f9307300 Sep 16 09:38:37 localhost kernel: ffff880421c29f40 ffff880421c29fb8 ffff8803faf06c40 ffff8803f9307300 Sep 16 09:38:37 localhost kernel: Call Trace: Sep 16 09:38:37 localhost kernel: [<ffffffff8163ae49>] schedule+0x29/0x70 Sep 16 09:38:37 localhost kernel: [<ffffffff81081504>] do_exit+0x1e4/0xa60 Sep 16 09:38:37 localhost kernel: [<ffffffff810c14dc>] ? update_curr+0xcc/0x150 Sep 16 09:38:37 localhost kernel: [<ffffffff810be30e>] ? account_entity_dequeue+0xae/0xd0 Sep 16 09:38:37 localhost kernel: [<ffffffff81081dff>] do_group_exit+0x3f/0xa0 Sep 16 09:38:37 localhost kernel: [<ffffffff81092c10>] get_signal_to_deliver+0x1d0/0x6d0 Sep 16 09:38:37 localhost kernel: [<ffffffff81014417>] do_signal+0x57/0x6c0 Sep 16 09:38:37 localhost kernel: [<ffffffff810d85dc>] ? ktime_get+0x4c/0xd0 Sep 16 09:38:37 localhost kernel: [<ffffffff810aa853>] ? hrtimer_nanosleep+0xd3/0x170 Sep 16 09:38:37 localhost kernel: [<ffffffff810a95c0>] ? hrtimer_get_res+0x50/0x50 Sep 16 09:38:37 localhost kernel: [<ffffffff81014adf>] do_notify_resume+0x5f/0xb0 Sep 16 09:38:37 localhost kernel: [<ffffffff8164617d>] int_signal+0x12/0x17
