Re: CONFIG_4KSTACKS in mm2?

[Martin Zwickel <martin.zwickel@technotrend.de>]

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On Wed, 7 Apr 2004 16:03:47 +0200
Ralf Hildebrandt <Ralf.Hildebrandt@charite.de> bubbled:

> * Zwane Mwaikambo <zwane@linuxpower.ca>:
> 
> > > Is there a way of disabling CONFIG_4KSTACKS in 2.6.5-mm2?
> > > Or to make it configurable?
> > 
> > "arch/i386/Kconfig" line 1498 of 1542 --97%-- col 8
> > config 4KSTACKS
> >         def_bool y
> > 
> > you could just change that to 'n'
> 
> That's what I did (and it works) -- but it's not really intuitive or
> even configurable (in the way of menuconfig or something).
> 

here is the patch to reenable the menu config option ...

-- 
MyExcuse:
What office are you in? Oh, that one.  Did you know that your building was built
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one, your office is right over where the core is buried!

Martin Zwickel <martin.zwickel@technotrend.de>
Research & Development

TechnoTrend AG <http://www.technotrend.de>

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diff -Naurp linux-2.6.5-rc1-mm1/arch/i386/Kconfig linux-2.6.5-rc1-mm1-removed/arch/i386/Kconfig
--- linux-2.6.5-rc1-mm1/arch/i386/Kconfig	2004-03-16 21:28:03.000000000 +0100
+++ linux-2.6.5-rc1-mm1-removed/arch/i386/Kconfig	2004-03-16 21:32:08.000000000 +0100
@@ -1555,7 +1555,14 @@ config MAGIC_SYSRQ
 	default y
 
 config 4KSTACKS
-	def_bool y
+	bool "Use 4Kb for kernel stacks instead of 8Kb"
+	default n
+	help
+	  If you say Y here the kernel will use a 4Kb stacksize for the
+	  kernel stack attached to each process/thread. This facilitates
+	  running more threads on a system and also reduces the pressure
+	  on the VM subsystem for higher order allocations. This option
+	  will also use IRQ stacks to compensate for the reduced stackspace.
 
 config X86_FIND_SMP_CONFIG
 	bool


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