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| author | alc <alc@FreeBSD.org> | 2010-04-30 15:22:52 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2010-04-30 15:22:52 +0000 |
| commit | 5cccf02a9e818719ef70601ab63344bbcdac7286 (patch) | |
| tree | ff51ba2aca6c8a33fe075b765342f9133a741390 /sys/powerpc | |
| parent | 306735e614e65ae3de67b0c1c1f74dd76e1583f3 (diff) | |
| download | FreeBSD-src-5cccf02a9e818719ef70601ab63344bbcdac7286.zip FreeBSD-src-5cccf02a9e818719ef70601ab63344bbcdac7286.tar.gz | |
MFamd64/i386 r207205
Clearing a page table entry's accessed bit and setting the page's
PG_REFERENCED flag in pmap_protect() can't really be justified, so
don't do it.
Additionally, two changes that make this pmap behave like the others do:
Change pmap_protect() such that it calls vm_page_dirty() only if the
page is managed.
Change pmap_remove_write() such that it doesn't clear a page table
entry's accessed bit.
Diffstat (limited to 'sys/powerpc')
| -rw-r--r-- | sys/powerpc/booke/pmap.c | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/sys/powerpc/booke/pmap.c b/sys/powerpc/booke/pmap.c index 0b0fce4..78e9afb 100644 --- a/sys/powerpc/booke/pmap.c +++ b/sys/powerpc/booke/pmap.c @@ -1915,16 +1915,11 @@ mmu_booke_protect(mmu_t mmu, pmap_t pmap, vm_offset_t sva, vm_offset_t eva, tlb_miss_lock(); /* Handle modified pages. */ - if (PTE_ISMODIFIED(pte)) + if (PTE_ISMODIFIED(pte) && PTE_ISMANAGED(pte)) vm_page_dirty(m); - /* Referenced pages. */ - if (PTE_ISREFERENCED(pte)) - vm_page_flag_set(m, PG_REFERENCED); - tlb0_flush_entry(va); - pte->flags &= ~(PTE_UW | PTE_SW | PTE_MODIFIED | - PTE_REFERENCED); + pte->flags &= ~(PTE_UW | PTE_SW | PTE_MODIFIED); tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); @@ -1962,13 +1957,8 @@ mmu_booke_remove_write(mmu_t mmu, vm_page_t m) if (PTE_ISMODIFIED(pte)) vm_page_dirty(m); - /* Referenced pages. */ - if (PTE_ISREFERENCED(pte)) - vm_page_flag_set(m, PG_REFERENCED); - /* Flush mapping from TLB0. */ - pte->flags &= ~(PTE_UW | PTE_SW | PTE_MODIFIED | - PTE_REFERENCED); + pte->flags &= ~(PTE_UW | PTE_SW | PTE_MODIFIED); tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); |
