diff options
author | alc <alc@FreeBSD.org> | 2002-12-14 22:25:35 +0000 |
---|---|---|
committer | alc <alc@FreeBSD.org> | 2002-12-14 22:25:35 +0000 |
commit | a1891f1f745589fb165ed4aa2a1b885742f10b6b (patch) | |
tree | 058ca5d3eaee594393d8d61500630cf0e8e979a8 /sys/alpha | |
parent | 524e713804055d6dc9b8da193b80f7a4cbe30ef4 (diff) | |
download | FreeBSD-src-a1891f1f745589fb165ed4aa2a1b885742f10b6b.zip FreeBSD-src-a1891f1f745589fb165ed4aa2a1b885742f10b6b.tar.gz |
MFi386 revisions 1.375 and 1.376
Hold the page queues lock when calling pmap_unwire_pte_hold() or
pmap_remove_pte(). Use vm_page_sleep_if_busy() in
_pmap_unwire_pte_hold() so that the page queues lock is released
when sleeping.
Diffstat (limited to 'sys/alpha')
-rw-r--r-- | sys/alpha/alpha/pmap.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/sys/alpha/alpha/pmap.c b/sys/alpha/alpha/pmap.c index 5da92e53..6c2c4bd 100644 --- a/sys/alpha/alpha/pmap.c +++ b/sys/alpha/alpha/pmap.c @@ -1174,8 +1174,8 @@ static int _pmap_unwire_pte_hold(pmap_t pmap, vm_offset_t va, vm_page_t m) { - while (vm_page_sleep_busy(m, FALSE, "pmuwpt")) - ; + while (vm_page_sleep_if_busy(m, FALSE, "pmuwpt")) + vm_page_lock_queues(); if (m->hold_count == 0) { vm_offset_t pteva; @@ -1199,8 +1199,10 @@ _pmap_unwire_pte_hold(pmap_t pmap, vm_offset_t va, vm_page_t m) if (m->pindex < NUSERLEV3MAPS) { /* unhold the level 2 page table */ vm_page_t lev2pg; - lev2pg = pmap_page_lookup(pmap->pm_pteobj, + lev2pg = vm_page_lookup(pmap->pm_pteobj, NUSERLEV3MAPS + pmap_lev1_index(va)); + while (vm_page_sleep_if_busy(lev2pg, FALSE, "pulook")) + vm_page_lock_queues(); vm_page_unhold(lev2pg); if (lev2pg->hold_count == 0) _pmap_unwire_pte_hold(pmap, va, lev2pg); @@ -1257,7 +1259,9 @@ pmap_unuse_pt(pmap_t pmap, vm_offset_t va, vm_page_t mpte) (pmap->pm_ptphint->pindex == ptepindex)) { mpte = pmap->pm_ptphint; } else { - mpte = pmap_page_lookup(pmap->pm_pteobj, ptepindex); + while ((mpte = vm_page_lookup(pmap->pm_pteobj, ptepindex)) != NULL && + vm_page_sleep_if_busy(mpte, FALSE, "pulook")) + vm_page_lock_queues(); pmap->pm_ptphint = mpte; } } @@ -2134,7 +2138,9 @@ pmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot, */ if (opa) { int err; + vm_page_lock_queues(); err = pmap_remove_pte(pmap, pte, va); + vm_page_unlock_queues(); if (err) panic("pmap_enter: pte vanished, va: 0x%lx", va); } @@ -2259,8 +2265,11 @@ retry: */ pte = vtopte(va); if (*pte) { - if (mpte) + if (mpte != NULL) { + vm_page_lock_queues(); pmap_unwire_pte_hold(pmap, va, mpte); + vm_page_unlock_queues(); + } alpha_pal_imb(); /* XXX overkill? */ return 0; } |