| From: |
| Ingo Molnar <mingo@elte.hu> |
| To: |
| Andrew Morton <akpm@linux-foundation.org> |
| Subject: |
| Re: x86: 4kstacks default |
| Date: |
| Sat, 19 Apr 2008 16:23:29 +0200 |
| Message-ID: |
| <20080419142329.GA5339@elte.hu> |
| Cc: |
| Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Arjan van de Ven <arjan@infradead.org>,
Thomas Gleixner <tglx@linutronix.de> |
| Archive-link: |
| Article,
Thread
|
* 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
