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SubjectRe: [PATCH] i386: instead of poisoning .init zone, change protection bits to force a fault
Benjamin LaHaise a écrit :
> On Sun, Jan 29, 2006 at 09:04:44PM +0100, Eric Dumazet wrote:
>> Chasing some invalid accesses to .init zone, I found that free_init_pages()
>> was properly freeing the pages but virtual was still usable.
>
> This change will break the large table entries up, resulting in more TLB
> pressure and reducing performance, and so should only be activated as a
> debug option.

Hum... yet another CONFIG option ?

Could we 'just' move rodata (because of CONFIG_DEBUG_RODATA) and .init section
in their own 2MB/4MB page, playing with vmlinux.lds.S ?

It would be possible to have a full hugepage readonly for rodata, and a full
NOPROT for .init ?

Eric
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