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Date: Sat, 19 Jan 2008 20:27:46 +0100 From: Andi Kleen <ak@...e.de> To: Ingo Molnar <mingo@...e.hu> Cc: tglx@...utronix.de, linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com> Subject: Re: [PATCH] [7/8] CPA: Implement GBpages support in change_page_attr() On Saturday 19 January 2008 19:53:14 Ingo Molnar wrote: > > * Andi Kleen <ak@...e.de> wrote: > > > arch/x86/mm/pageattr_64.c | 150 > > ++++++++++++++++++++++++++++++++++++---------- > > 1 file changed, 119 insertions(+), 31 deletions(-) > > please unify the files first, we dont want to let pageattr_32.c and > pageattr_64.c diverge even more. Once we get these files unified we > layer more features ontop of it. They work significantly differently in a few important areas (e.g. particularly regarding NX handling and the kernel mapping) Off the top of my head I don't know of a clean way to unify them. 32bit and 64bit kernel mappings differ in many significant ways. Maybe it's possible, but it's certainly not something I would want to tackle short term in a hurry. The kernel mappings between 32bit and 64bit are quite different. However I would like GBPAGES definitely to make the .25 merge window and they won't work without the upgraded c_p_a(). So please reconsider. > While gbpages is not available on > 32-bit and probably wont ever be, this code has been historically very > fragile, I'm sure a hurried up unification would make it even more fragile. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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