diff options
Diffstat (limited to 'sys/uvm/uvm_amap.c')
| -rw-r--r-- | sys/uvm/uvm_amap.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/sys/uvm/uvm_amap.c b/sys/uvm/uvm_amap.c index f24130c93dd..0b38ac13faf 100644 --- a/sys/uvm/uvm_amap.c +++ b/sys/uvm/uvm_amap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm_amap.c,v 1.21 2002/01/23 00:39:48 art Exp $ */ +/* $OpenBSD: uvm_amap.c,v 1.22 2002/02/12 18:36:53 provos Exp $ */ /* $NetBSD: uvm_amap.c,v 1.27 2000/11/25 06:27:59 chs Exp $ */ /* @@ -171,12 +171,14 @@ amap_alloc1(slots, padslots, waitf) int slots, padslots, waitf; { struct vm_amap *amap; - int totalslots = slots + padslots; + int totalslots; amap = pool_get(&uvm_amap_pool, (waitf == M_WAITOK) ? PR_WAITOK : 0); if (amap == NULL) return(NULL); + totalslots = malloc_roundup((slots + padslots) * sizeof(int)) / + sizeof(int); simple_lock_init(&amap->am_l); amap->am_ref = 1; amap->am_flags = 0; @@ -234,7 +236,8 @@ amap_alloc(sz, padsz, waitf) amap = amap_alloc1(slots, padslots, waitf); if (amap) - memset(amap->am_anon, 0, (slots + padslots) * sizeof(struct vm_anon *)); + memset(amap->am_anon, 0, + amap->am_maxslot * sizeof(struct vm_anon *)); UVMHIST_LOG(maphist,"<- done, amap = 0x%x, sz=%d", amap, sz, 0, 0); return(amap); @@ -286,7 +289,7 @@ amap_extend(entry, addsize) { struct vm_amap *amap = entry->aref.ar_amap; int slotoff = entry->aref.ar_pageoff; - int slotmapped, slotadd, slotneed; + int slotmapped, slotadd, slotneed, slotalloc; #ifdef UVM_AMAP_PPREF int *newppref, *oldppref; #endif @@ -361,10 +364,11 @@ amap_extend(entry, addsize) */ amap_unlock(amap); /* unlock in case we sleep in malloc */ + slotalloc = malloc_roundup(slotneed * sizeof(int)) / sizeof(int); #ifdef UVM_AMAP_PPREF newppref = NULL; if (amap->am_ppref && amap->am_ppref != PPREF_NONE) { - newppref = malloc(slotneed * sizeof(int), M_UVMAMAP, M_NOWAIT); + newppref = malloc(slotalloc *sizeof(int), M_UVMAMAP, M_NOWAIT); if (newppref == NULL) { /* give up if malloc fails */ free(amap->am_ppref, M_UVMAMAP); @@ -372,9 +376,9 @@ amap_extend(entry, addsize) } } #endif - newsl = malloc(slotneed * sizeof(int), M_UVMAMAP, M_WAITOK); - newbck = malloc(slotneed * sizeof(int), M_UVMAMAP, M_WAITOK); - newover = malloc(slotneed * sizeof(struct vm_anon *), + newsl = malloc(slotalloc * sizeof(int), M_UVMAMAP, M_WAITOK); + newbck = malloc(slotalloc * sizeof(int), M_UVMAMAP, M_WAITOK); + newover = malloc(slotalloc * sizeof(struct vm_anon *), M_UVMAMAP, M_WAITOK); amap_lock(amap); /* re-lock! */ KASSERT(amap->am_maxslot < slotneed); @@ -383,7 +387,7 @@ amap_extend(entry, addsize) * now copy everything over to new malloc'd areas... */ - slotadded = slotneed - amap->am_nslot; + slotadded = slotalloc - amap->am_nslot; /* do am_slots */ oldsl = amap->am_slots; @@ -412,13 +416,14 @@ amap_extend(entry, addsize) if ((slotoff + slotmapped) < amap->am_nslot) amap_pp_adjref(amap, slotoff + slotmapped, (amap->am_nslot - (slotoff + slotmapped)), 1); - pp_setreflen(newppref, amap->am_nslot, 1, slotadded); + pp_setreflen(newppref, amap->am_nslot, 1, + slotneed - amap->am_nslot); } #endif /* update master values */ amap->am_nslot = slotneed; - amap->am_maxslot = slotneed; + amap->am_maxslot = slotalloc; /* unlock */ amap_unlock(amap); @@ -664,6 +669,8 @@ amap_copy(map, entry, waitf, canchunk, startva, endva) amap->am_slots[amap->am_nused] = lcv; amap->am_nused++; } + memset(&amap->am_anon[lcv], 0, + (amap->am_maxslot - lcv) * sizeof(struct vm_anon *)); /* * drop our reference to the old amap (srcamap) and unlock. |