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Retrieve the page outside of holding locks

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pmap_track_page() only works with physical memory pages, which have a
constant vm_page_t address.  Microoptimize pmap_track_page() to perform one
less operation under the lock.
This commit is contained in:
Justin Hibbits 2017-12-10 04:43:27 +00:00
parent d30f122fa6
commit 713e844971
1 changed files with 1 additions and 1 deletions
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2
sys/powerpc/booke/pmap.c
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@ -4224,10 +4224,10 @@ pmap_track_page(pmap_t pmap, vm_offset_t va)
va = trunc_page(va);
pa = pmap_kextract(va);
page = PHYS_TO_VM_PAGE(pa);
rw_wlock(&pvh_global_lock);
PMAP_LOCK(pmap);
page = PHYS_TO_VM_PAGE(pa);
TAILQ_FOREACH(pve, &page->md.pv_list, pv_link) {
if ((pmap == pve->pv_pmap) && (va == pve->pv_va)) {