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| author | alc <alc@FreeBSD.org> | 2010-04-29 15:47:31 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2010-04-29 15:47:31 +0000 |
| commit | df2257e061f55c35d76f33f91541c65c33f7a2a7 (patch) | |
| tree | 3bc3eb69048a61f232f804a52e008180280b53da /sys/sun4v | |
| parent | db164aeb155dac81c7d06bc5e1780b7dadebde0b (diff) | |
| download | FreeBSD-src-df2257e061f55c35d76f33f91541c65c33f7a2a7.zip FreeBSD-src-df2257e061f55c35d76f33f91541c65c33f7a2a7.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. Moreover, on ia64, don't set the page's dirty field
unless pmap_protect() is removing write access.
Diffstat (limited to 'sys/sun4v')
| -rw-r--r-- | sys/sun4v/sun4v/pmap.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/sys/sun4v/sun4v/pmap.c b/sys/sun4v/sun4v/pmap.c index 2633b8e..cbd8106 100644 --- a/sys/sun4v/sun4v/pmap.c +++ b/sys/sun4v/sun4v/pmap.c @@ -1824,17 +1824,10 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot) if (!anychanged && (otte_data & VTD_W)) anychanged = 1; - if (otte_data & VTD_MANAGED) { - m = NULL; - - if (otte_data & VTD_REF) { - m = PHYS_TO_VM_PAGE(TTE_GET_PA(otte_data)); - vm_page_flag_set(m, PG_REFERENCED); - } - if (otte_data & VTD_W) { - m = PHYS_TO_VM_PAGE(TTE_GET_PA(otte_data)); - vm_page_dirty(m); - } + if ((otte_data & (VTD_MANAGED | VTD_W)) == (VTD_MANAGED | + VTD_W)) { + m = PHYS_TO_VM_PAGE(TTE_GET_PA(otte_data)); + vm_page_dirty(m); } } |
