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SubjectRe: [serial8250_interrupt] RIP: 0010:arch_local_irq_restore+0x2/0x8
On Tue, Nov 21, 2017 at 08:33:57PM +0800, Fengguang Wu wrote:
>Hello,
>
>FYI this happens in mainline kernel 4.14.0-02748-gabc36be.
>It shows up since v4.13 .

Sorry it actually also shows up in 4.10:

/pkg/linux/x86_64-rhel-7.2+CONFIG_DEBUG_INFO_REDUCED/gcc-6/c470abd4fde40ea6a0846a2beab642a578c0b8cd/dmesg-vm-lkp-hsw01-4G-1:20171110043200:x86_64-rhel-7.2+CONFIG_DEBUG_INFO_REDUCED:4.10.0:1

[ 19.902933]
[ 19.904514]
[ 19.904515]
[ 21.020567] irq 3: nobody cared (try booting with the "irqpoll" option)
[ 21.021466] CPU: 0 PID: 4094 Comm: dmesg Not tainted 4.10.0 #1
[ 21.022276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 21.023584] Call Trace:
[ 21.024126] <IRQ>
[ 21.025622] dump_stack+0x63/0x8a
[ 21.026238] __report_bad_irq+0x35/0xc0
[ 21.026890] note_interrupt+0x234/0x270
[ 21.027548] handle_irq_event_percpu+0x45/0x60
[ 21.028249] handle_irq_event+0x42/0x70
[ 21.028901] handle_edge_irq+0x74/0x140
[ 21.029560] handle_irq+0x73/0x120
[ 21.030177] ? irq_exit+0x6a/0xf0
[ 21.030794] do_IRQ+0x46/0xd0
[ 21.031380] common_interrupt+0x8e/0x8e
[ 21.032042] RIP: 0010:_raw_spin_unlock_irqrestore+0x15/0x30
[ 21.032831] RSP: 0018:ffffc90002d9fd28 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffcc
[ 21.034081] RAX: 0000000000000001 RBX: ffffffff82362ee8 RCX: 0000000000000000
[ 21.034999] RDX: 00000000000002f9 RSI: 0000000000000286 RDI: 0000000000000286
[ 21.035914] RBP: ffffc90002d9fd28 R08: 0000000000000004 R09: ffff88012e6dfc38
[ 21.036826] R10: 00007ffc8f5bb708 R11: ffff88007f542580 R12: ffff88007fd51c00
[ 21.037742] R13: 0000000000000286 R14: ffffc900031672a0 R15: 0000000000000001
[ 21.038654] </IRQ>
[ 21.039171] uart_start+0x73/0xe0
[ 21.039783] uart_flush_chars+0xe/0x10
[ 21.040430] n_tty_write+0x231/0x450
[ 21.041068] ? __wake_up_sync+0x20/0x20
[ 21.041721] tty_write+0x1ab/0x330
[ 21.042346] ? n_tty_open+0xd0/0xd0
[ 21.042972] __vfs_write+0x28/0x140
[ 21.043602] ? security_file_permission+0x3b/0xc0
[ 21.044326] ? rw_verify_area+0x4e/0xb0
[ 21.044977] vfs_write+0xc8/0x1e0
[ 21.045596] SyS_write+0x46/0xa0
[ 21.046207] entry_SYSCALL_64_fastpath+0x1a/0xa9
[ 21.046926] RIP: 0033:0x7f7a0064a720
[ 21.047560] RSP: 002b:00007ffc8f5bb688 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 21.048811] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f7a0064a720
[ 21.049723] RDX: 0000000000000001 RSI: 000000000060c400 RDI: 0000000000000001
[ 21.050636] RBP: 00007f7a00907683 R08: 00007f7a00908760 R09: 00007f7a00907600
[ 21.051554] R10: 00007ffc8f5bb708 R11: 0000000000000246 R12: 0000000000000001
[ 21.052471] R13: 0000000000000001 R14: 00007f7a00907600 R15: 0000000000000001
[ 21.053383] handlers:
[ 21.053913] [<ffffffff81529190>] serial8250_interrupt
[ 21.054662] Disabling IRQ #3

Fengguang

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