linux-kernel - Re: [serial8250_interrupt] RIP: 0010:arch_local_irq

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Date:   Tue, 21 Nov 2017 23:14:24 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Fengguang Wu <fengguang.wu@...el.com>, linux-serial@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Sean Young <sean@...s.org>,
        Matthias Brugger <mbrugger@...e.com>,
        linux-kernel@...r.kernel.org, lkp@...org
Subject: Re: [serial8250_interrupt] RIP: 0010:arch_local_irq_restore+0x2/0x8

On Tue, 2017-11-21 at 16:39 +0200, Andy Shevchenko wrote:
> On Tue, 2017-11-21 at 21:31 +0800, Fengguang Wu wrote:
> > On Tue, Nov 21, 2017 at 08:33:57PM +0800, Fengguang Wu wrote:

>>> 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:

>> [   21.020567] irq 3: nobody cared (try booting with the "irqpoll"
> > option)

> > [   21.039171]  uart_start+0x73/0xe0

> > [   21.044977]  vfs_write+0xc8/0x1e0

> > [   21.054662] Disabling IRQ #3

Another question who and why initiates a write to ttyS1 (console seems
on ttyS0).

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy