linux-kernel - Re: [RFC PATCH 4/5] hvc_console: Add tty window resizing

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Message-Id: <200810161358.40428.borntraeger@de.ibm.com>
Date:	Thu, 16 Oct 2008 13:58:40 +0200
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linux PPC devel <linuxppc-dev@...abs.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	"Ryan S. Arnold" <rsa@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [RFC PATCH 4/5] hvc_console: Add tty window resizing

Am Donnerstag, 16. Oktober 2008 schrieb Rusty Russell:
> > The patch provides the hvc_resize() function to update the terminal
> > window dimensions (struct winsize) for a specified hvc console.
> > The function stores the new window size and schedules a function
> > that finally updates the tty winsize and signals the change to
> > user space (SIGWINCH).
> > Because the winsize update must acquire a mutex and might sleep,
> > the function is scheduled instead of being called from hvc_poll()
> > or khvcd.
> 
> I want this functionality for lguest, too.  But I don't see anything which 
> uses this call yet?   Are we going to use the config_change notifier from 
> virtio?  (Which IIRC neither S/390 nor lguest have plumbed in).

I have some prototype patches for virtio_console, but did not find the time to 
finish them.

Christian
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