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| author | Dave Kleikamp <shaggy@austin.ibm.com> | 2005-08-04 15:56:15 -0500 |
|---|---|---|
| committer | Dave Kleikamp <shaggy@austin.ibm.com> | 2005-08-04 15:56:15 -0500 |
| commit | a5c96cab8f3c4ca9b2177dceb5de5a0edb31418e (patch) | |
| tree | 45692a1b3d770f721f4586ad81c206f1b8509b75 /include/asm-x86_64/tlbflush.h | |
| parent | 30db1ae8640d3527ca7ac8df4bcbf14ccc6ae9cd (diff) | |
| parent | 1c5ad84516ae7ea4ec868436a910a6bd8d20215a (diff) | |
| download | op-kernel-dev-a5c96cab8f3c4ca9b2177dceb5de5a0edb31418e.zip op-kernel-dev-a5c96cab8f3c4ca9b2177dceb5de5a0edb31418e.tar.gz | |
Merge with /home/shaggy/git/linus-clean/
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Diffstat (limited to 'include/asm-x86_64/tlbflush.h')
| -rw-r--r-- | include/asm-x86_64/tlbflush.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/include/asm-x86_64/tlbflush.h b/include/asm-x86_64/tlbflush.h index 0617423..505b0cf 100644 --- a/include/asm-x86_64/tlbflush.h +++ b/include/asm-x86_64/tlbflush.h @@ -56,8 +56,9 @@ extern unsigned long pgkern_mask; * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables * - * ..but the x86_64 has somewhat limited tlb flushing capabilities, - * and page-granular flushes are available only on i486 and up. + * x86-64 can only flush individual pages or full VMs. For a range flush + * we always do the full VM. Might be worth trying if for a small + * range a few INVLPGs in a row are a win. */ #ifndef CONFIG_SMP @@ -115,7 +116,9 @@ static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long st static inline void flush_tlb_pgtables(struct mm_struct *mm, unsigned long start, unsigned long end) { - /* x86_64 does not keep any page table caches in TLB */ + /* x86_64 does not keep any page table caches in a software TLB. + The CPUs do in their hardware TLBs, but they are handled + by the normal TLB flushing algorithms. */ } #endif /* _X8664_TLBFLUSH_H */ |
