linux-kernel - Re: [patch 25/59] Fix UML on non-standard VM split hosts

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Date:	Sat, 3 Feb 2007 17:06:54 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Chris Wright <chrisw@...s-sol.org>
Cc:	linux-kernel@...r.kernel.org, stable@...nel.org, akpm@...l.org,
	Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	"Theodore Ts'o" <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Jeff Dike <jdike@...toit.com>,
	Blaisorblade <blaisorblade@...oo.it>,
	Pravin <shindepravin@...il.com>, uml@...natel.org
Subject: Re: [patch 25/59] Fix UML on non-standard VM split hosts

On Fri, 02 Feb 2007 18:35:29 -0800 Chris Wright wrote:

> -stable review patch.  If anyone has any objections, please let us know.
> ------------------
> 
> From: Jeff Dike <jdike@...toit.com>
> 
> This fixes UML on hosts with non-standard VM splits.  We had changed
> the config variable that controls UML behavior on such hosts, but not
> propogated the change everywhere.  In particular, the values of
> STUB_CODE and STUB_DATA relied on the old variable.
> 
> I also reformatted the HOST_VMSPLIT_3G help to make it more standard.

The reformatting looks bad to me.  Kconfig help text should be
indented consistently by 2 spaces under "help".

This can be fixed later if you don't want to drop it from -stable.


> Spotted by uml@...natel.org.
> 
> Signed-off-by: Jeff Dike <jdike@...toit.com>
> Signed-off-by: Chris Wright <chrisw@...s-sol.org>
> --
>  arch/um/Kconfig.i386 |   38 +++++++++++++++++++-------------------
>  1 file changed, 19 insertions(+), 19 deletions(-)
> 
> --- linux-2.6.19.2.orig/arch/um/Kconfig.i386
> +++ linux-2.6.19.2/arch/um/Kconfig.i386
> @@ -19,22 +19,22 @@ config SEMAPHORE_SLEEPERS
>  choice
>  	prompt "Host memory split"
>  	default HOST_VMSPLIT_3G
> -	---help---
> -	   This is needed when the host kernel on which you run has a non-default
> -	   (like 2G/2G) memory split, instead of the customary 3G/1G. If you did
> -	   not recompile your own kernel but use the default distro's one, you can
> -	   safely accept the "Default split" option.
> -
> -	   It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via
> -	   CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck
> -	   patchset by Con Kolivas, or other ones) - option names match closely the
> -	   host CONFIG_VM_SPLIT_* ones.
> -
> -	   A lower setting (where 1G/3G is lowest and 3G/1G is higher) will
> -	   tolerate even more "normal" host kernels, but an higher setting will be
> -	   stricter.
> +	help
> +        This is needed when the host kernel on which you run has a non-default
> +	(like 2G/2G) memory split, instead of the customary 3G/1G. If you did
> +	not recompile your own kernel but use the default distro's one, you can
> +	safely accept the "Default split" option.
> +
> +	It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via
> +	CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck
> +	patchset by Con Kolivas, or other ones) - option names match closely the
> +	host CONFIG_VM_SPLIT_* ones.
> +
> +	A lower setting (where 1G/3G is lowest and 3G/1G is higher) will
> +	tolerate even more "normal" host kernels, but an higher setting will be
> +	stricter.
>  
> -	   So, if you do not know what to do here, say 'Default split'.
> +	So, if you do not know what to do here, say 'Default split'.
>  
>  	config HOST_VMSPLIT_3G
>  		bool "Default split (3G/1G user/kernel host split)"


---
~Randy
-
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