Re: [PATCH] n_tty_read: check for hanging tty while waiting for input
From: Aristeu Rozanski
Date: Tue Feb 17 2015 - 16:50:58 EST
On Tue, Feb 17, 2015 at 04:28:30PM -0500, Peter Hurley wrote:
> On 02/17/2015 04:06 PM, Aristeu Rozanski wrote:
> > If the console has a canonical reader and the respective tty hangs up,
> > it'll waste a wake up and will never release the last ldisc reference so
> > the hangup process can finish:
> This behavior is by-design; /dev/console cannot be hung-up.
hangup is issued on the tty that happens to be the console. In this
> What process is sleeping on /dev/console read() and what is its controlling
> tty? I ask because console teardown usually happens when SIGHUP is
> received by the process group.
ttyS0 is the controller tty.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/