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x86: CPA avoid repeated lazy mmu flush

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Impact: Flush the lazy MMU only once

Pending mmu updates only need to be flushed once to bring the
in-memory pagetable state up to date.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2009-02-12 21:16:09 +01:00
parent 34b0900d32
commit 7ad9de6ac8
1 changed files with 7 additions and 8 deletions
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15
arch/x86/mm/pageattr.c
View file

@ -575,14 +575,6 @@ static int __change_page_attr(struct cpa_data *cpa, int primary)
address = cpa->vaddr[cpa->curpage];
else
address = *cpa->vaddr;
/*
* If we're called with lazy mmu updates enabled, the
* in-memory pte state may be stale. Flush pending updates to
* bring them up to date.
*/
arch_flush_lazy_mmu_mode();
repeat:
kpte = lookup_address(address, &level);
if (!kpte)
@ -819,6 +811,13 @@ static int change_page_attr_set_clr(unsigned long *addr, int numpages,
vm_unmap_aliases();
/*
* If we're called with lazy mmu updates enabled, the
* in-memory pte state may be stale. Flush pending updates to
* bring them up to date.
*/
arch_flush_lazy_mmu_mode();
cpa.vaddr = addr;
cpa.numpages = numpages;
cpa.mask_set = mask_set;