[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20070829180158.GA7849@uranus.ravnborg.org>
Date: Wed, 29 Aug 2007 20:01:58 +0200
From: Sam Ravnborg <sam@...nborg.org>
To: Hugh Dickins <hugh@...itas.com>
Cc: Roman Zippel <zippel@...ux-m68k.org>, linux-kernel@...r.kernel.org,
kbuild-devel@...ts.sourceforge.net
Subject: Re: CONFIG_HOTPLUG_CPU: kconfig bug?
> > > I've noticed an oddity with CONFIG_HOTPLUG_CPU in 2.6.23-rc:
> > > make oldconfig seems to turn it on even when nothing wants it,
> > > increasing kernel size by about 10k; but if you then edit the
> > > line out of .config and make oldconfig again, it correctly
> > > offers the choice and lets it be turned off after all.
I have tried to track down what is happening here.
The culprint is:
config SUSPEND_SMP
bool
depends on SUSPEND_SMP_POSSIBLE && PM_SLEEP
select HOTPLUG_CPU
default y
It seems that due to the fact that SUSPEND_SMP is default y
then kconfig enforce the "select HOTPLUG_CPU".
And this happens despite the fact that PM_SLEEP is 'n'
(but SUSPEND_SMP_POSSIBLE is 'y').
It is somewhere in sym_calc_value() or one of the childs that
suddenly causes the change.
But I find it hard to follow this part of the logic in kconfig.
Roman - can you help here with what is going on?
Sam
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists