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Date: Fri, 25 Jan 2008 13:23:09 -0800 From: Jeremy Fitzhardinge <jeremy@...p.org> To: Ingo Molnar <mingo@...e.hu> Cc: LKML <linux-kernel@...r.kernel.org>, Andi Kleen <ak@...e.de>, Jan Beulich <jbeulich@...ell.com>, Eduardo Pereira Habkost <ehabkost@...hat.com>, Ian Campbell <ijc@...lion.org.uk>, H Peter Anvin <hpa@...or.com> Subject: [PATCH 00 of 11] x86: separate pmd lifetime from pgd Hi Ingo, This series addresses various cleanups in pagetable allocation in the direction of unifying 32/64 bits (that's still a while off yet). The significant change in here is that I'm separating the lifetime of a pmd from its pgd in the 32-bit PAE case. This makes it logically the same as 64-bit pagetable allocation, and it overall simplifies the code. The patches are: - A pure Xen fix I tacked on for convenience - Use the same pgd_list mechanism for 32 and 64 bits - Add an mm parameter for paravirt_alloc_pd, for consistency - Some fixes to early_ioremap to make sure the right paravirt hooks are called appropriately - de-macro asm-x86/pgalloc_32.h - make mm/pgtable_32.c:pgd_ctor a single function - dynamically allocate pmds rather than always allocating them with the pgd - Add Xen bits for dealing with pmd allocation - Preallocate pmds to avoid excessive tlb flushes - Allocate and initialize kernel pmds when they're not shared - Avoid excessive tlb flushes when pulling down pmds. I've done a number of randconfig test builds to shake out various configurations on 32 nd 64 bits. One caveat: in order to demacro pgalloc_32.h, I had to rearrange some headers in asm-generic/tlb.h, as it was including asm/pgalloc.h for no good reason. As a result, any other file which was expecting to implicitly pick up asm/pgalloc.h when including a asm/tlb.h header may get header file problems. I have not done any cross builds to try and track down any non-x86 fallout from this. Thanks, J -- 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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