Re: [-mm patch] i386: enable 4k stacks by default

[Grant Coady]

On Wed, 4 Jan 2006 15:51:38 +0100, Adrian Bunk <bunk@xxxxxxxxx> wrote:

>This patch enables 4k stacks by default.
>
>4k stacks have become a well-tested feature used fore a long time in 
>Fedora and even in RHEL 4.
>
>There are no known problems in in-kernel code with 4k stacks still 
>present after Neil's patch that went into -mm nearly two months ago.
>
>Defaulting to 4k stacks in -mm kernel will give some more testing 
>coverage and should show whether there are really no problems left.
>
>Keeping the option for now should make the people happy who want to use 
>the experimental -mm kernel but don't trust the well-tested 4k stacks.
>
>
>Signed-off-by: Adrian Bunk <bunk@xxxxxxxxx>
>
>--- linux-2.6.15-rc5-mm3-full/arch/i386/Kconfig.debug.old	2006-01-04 11:43:55.000000000 +0100
>+++ linux-2.6.15-rc5-mm3-full/arch/i386/Kconfig.debug	2006-01-04 11:44:14.000000000 +0100
>@@ -53,8 +53,8 @@
> 	  If in doubt, say "N".
> 
> config 4KSTACKS
>-	bool "Use 4Kb for kernel stacks instead of 8Kb"
>-	depends on DEBUG_KERNEL
>+	bool "Use 4Kb for kernel stacks instead of 8Kb" if DEBUG_KERNEL
>+	default y
> 	help
> 	  If you say Y here the kernel will use a 4Kb stacksize for the
> 	  kernel stack attached to each process/thread. This facilitates

Perhaps mention 4k + 4k stacks, the separate irq stacks used with 4k option?  

Grant.
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