Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [6/36] CPA Handle 4K split pages at boot on 64bit | Date | Wed, 16 Jan 2008 23:15:04 +0100 (CET) |
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Port the code to check for already split 4K pages at boot over from 32bit to 64bit.
Note: should be probably put before PAT patches to avoid bisect failures later Signed-off-by: Andi Kleen <ak@suse.de>
--- arch/x86/mm/pageattr_64.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
Index: linux/arch/x86/mm/pageattr_64.c =================================================================== --- linux.orig/arch/x86/mm/pageattr_64.c +++ linux/arch/x86/mm/pageattr_64.c @@ -160,11 +160,8 @@ __change_page_attr(unsigned long address } else BUG(); - /* on x86-64 the direct mapping set at boot is not using 4k pages */ - BUG_ON(PageReserved(kpte_page)); - save_page(kpte_page); - if (page_private(kpte_page) == 0) + if (!PageReserved(kpte_page) && page_private(kpte_page) == 0) revert_page(address, ref_prot); return 0; } @@ -243,6 +240,8 @@ void global_flush_tlb(void) list_for_each_entry_safe(pg, next, &l, lru) { list_del(&pg->lru); + if (PageReserved(pg)) + continue; clear_bit(PG_arch_1, &pg->flags); if (page_private(pg) != 0) continue;
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