linux-kernel - Re: [PATCH] serial: turn serial console suspend a boot rather than compile time option

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Message-ID: <20070814074657.GB2905@elf.ucw.cz>
Date:	Tue, 14 Aug 2007 09:46:57 +0200
From:	Pavel Machek <pavel@....cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andres Salomon <dilinger@...ued.net>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] serial: turn serial console suspend a boot rather than compile time option

On Wed 2007-08-08 15:41:30, Andrew Morton wrote:
> On Wed, 8 Aug 2007 18:35:35 -0400
> Andres Salomon <dilinger@...ued.net> wrote:
> 
> > Currently, there's a CONFIG_DISABLE_CONSOLE_SUSPEND that allows one to stop
> > the serial console from being suspended when the rest of the machine goes
> > to sleep.  This is incredibly useful for debugging power management-related
> > things; however, having it as a compile-time option has proved to be
> > incredibly inconvenient for us (OLPC).  There are plenty of times that we
> > want serial console to not suspend, but for the most part we'd like serial
> > console to be suspended.
> > 
> > This drops CONFIG_DISABLE_CONSOLE_SUSPEND, and replaces it with a kernel
> > boot parameter (no_console_suspend).  By default, the serial console will
> > be suspended along with the rest of the system; by passing
> > 'no_console_suspend' to the kernel during boot, serial console will remain
> > alive during suspend.
> > 
> > I have another version of this patch which keeps #ifdefs around; however,
> > it's uglier.  I prefer this version of the patch, and don't feel that it
> > increases bloat.  If people strongly disagree, let me know and I'll submit
> > the other patch.
> > 
> 
> yep, compile-time options suck.

Run-time options suck, too, for stuff that should not be optional; we
should keep console live if the console driver can handle it, not
otherwise.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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