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SubjectRe: x86: 4kstacks default

* Andrew Morton <akpm@linux-foundation.org> wrote:

> > config 4KSTACKS
> > bool "Use 4Kb for kernel stacks instead of 8Kb"
> > - depends on DEBUG_KERNEL
> > depends on X86_32
> > + default y
>
> This patch will cause kernels to crash.

what mainline kernels crash and how will they crash? Fedora and other
distros have had 4K stacks enabled for years:

$ grep 4K /boot/config-2.6.24-9.fc9
CONFIG_4KSTACKS=y

and we've conducted tens of thousands of bootup tests with all sorts of
drivers and kernel options enabled and have yet to see a single crash
due to 4K stacks. So basically the kernel default just follows the
common distro default now. (distros and users can still disable it)

Ingo


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