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| author | Jeff Dike <jdike@addtoit.com> | 2007-05-06 14:51:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 12:13:04 -0700 |
| commit | 64f60841c096594b8073e408cd9b40d7d08dcfdd (patch) | |
| tree | 3ad05b0b5f83d174eb2a7efdfd95d09f171aa51d /arch/um/kernel/tlb.c | |
| parent | 8603ec81487a5fefbc29611ff0d635b33b6da990 (diff) | |
| download | blackbird-op-linux-64f60841c096594b8073e408cd9b40d7d08dcfdd.tar.gz blackbird-op-linux-64f60841c096594b8073e408cd9b40d7d08dcfdd.zip | |
uml: speed page fault path
Give the page fault code a specialized path. There is only one page to look
at, so there's no point in going into the general page table walking code.
There's only going to be one host operation, so there are no opportunities for
merging. So, we go straight to the pte we want, figure out what needs doing,
and do it.
While I was in here, I fixed the wart where the address passed to unmap was a
void *, but an unsigned long to map and protect.
This gives me just under 10% on a kernel build.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/kernel/tlb.c')
| -rw-r--r-- | arch/um/kernel/tlb.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c index e201ccf0ec89..00de86efccaa 100644 --- a/arch/um/kernel/tlb.c +++ b/arch/um/kernel/tlb.c @@ -381,7 +381,9 @@ pte_t *addr_pte(struct task_struct *task, unsigned long addr) void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) { address &= PAGE_MASK; - flush_tlb_range(vma, address, address + PAGE_SIZE); + + CHOOSE_MODE(flush_tlb_range(vma, address, address + PAGE_SIZE), + flush_tlb_page_skas(vma, address)); } void flush_tlb_all(void) |
