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

Grant Coady
2006-01-04T20:53:07Z

On Wed, 4 Jan 2006 15:51:38 +0100, Adrian Bunk <bunk@stusta.de> 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@stusta.de>
>
>--- 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.