@@ -509,8 +509,10 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
*/
unsigned long access, trap;
- if (radix_enabled())
+ if (radix_enabled()) {
+ prefetch((void *)address);
return;
+ }
/* We only want HPTEs for linux PTEs that have _PAGE_ACCESSED set */
if (!pte_young(*ptep) || address >= TASK_SIZE)
@@ -145,7 +145,8 @@ pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
pmd_t *pmd)
{
- return;
+ if (radix_enabled())
+ prefetch((void *)addr);
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
Prefetch the faulting address in update_mmu_cache to give the page table walker perhaps 100 cycles head start as locks are dropped and the interrupt completed. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- arch/powerpc/mm/mem.c | 4 +++- arch/powerpc/mm/pgtable-book3s64.c | 3 ++- 2 files changed, 5 insertions(+), 2 deletions(-)