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Included NewOS change 1685 in OpenBeOS; a fix for the VM.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2190 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2002-12-08 23:12:09 +00:00
parent fb33f9f54d
commit d768457f49
1 changed files with 34 additions and 7 deletions
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41
src/kernel/core/vm/vm.c
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@ -323,7 +323,7 @@ static int map_backing_store(vm_address_space *aspace, vm_store *store,
// aspace, store, *vaddr, offset, size, addr_type, wiring, lock, _region, region_name);
region = _vm_create_region_struct(aspace, region_name, wiring, lock);
if(!region)
if (!region)
return ENOMEM;
cache = store->cache;
@ -331,7 +331,7 @@ static int map_backing_store(vm_address_space *aspace, vm_store *store,
// if this is a private map, we need to create a new cache & store object
// pair to handle the private copies of pages as they are written to
if(mapping == REGION_PRIVATE_MAP) {
if (mapping == REGION_PRIVATE_MAP) {
// create an anonymous store object
nu_store = vm_store_create_anonymous_noswap();
if(nu_store == NULL)
@ -343,7 +343,7 @@ static int map_backing_store(vm_address_space *aspace, vm_store *store,
if(nu_cache_ref == NULL)
panic("map_backing_store: vm_cache_ref_create returned NULL");
nu_cache->temporary = 1;
nu_cache->scan_skip = 0;
nu_cache->scan_skip = cache->scan_skip;
nu_cache->source = cache;
@ -503,6 +503,23 @@ region_id vm_create_anonymous_region(aspace_id aid, char *name, void **address,
dprintf("create_anonymous_region: %s: size 0x%lx\n", name, size);
/* check parameters */
if (addr_type != REGION_ADDR_ANY_ADDRESS && addr_type != REGION_ADDR_EXACT_ADDRESS)
return B_BAD_VALUE;
switch (wiring) {
case REGION_WIRING_WIRED:
case REGION_WIRING_WIRED_ALREADY:
case REGION_WIRING_WIRED_CONTIG:
case REGION_WIRING_LAZY:
break;
default:
return B_BAD_VALUE;
}
aspace = vm_get_aspace_by_id(aid);
if(aspace == NULL)
return ERR_VM_INVALID_ASPACE;
aspace = vm_get_aspace_by_id(aid);
if(aspace == NULL)
return ERR_VM_INVALID_ASPACE;
@ -520,7 +537,17 @@ region_id vm_create_anonymous_region(aspace_id aid, char *name, void **address,
if(cache_ref == NULL)
panic("vm_create_anonymous_region: vm_cache_ref_create returned NULL");
cache->temporary = 1;
cache->scan_skip = 0;
switch (wiring) {
case REGION_WIRING_WIRED:
case REGION_WIRING_WIRED_ALREADY:
case REGION_WIRING_WIRED_CONTIG:
cache->scan_skip = 1;
break;
case REGION_WIRING_LAZY:
cache->scan_skip = 0;
break;
}
// dprintf("create_anonymous_region: calling map_backing store\n");
@ -654,13 +681,13 @@ region_id vm_map_physical_memory(aspace_id aid, char *name, void **address, int
// create an device store object
store = vm_store_create_device(phys_addr);
if(store == NULL)
panic("vm_map_physical_memory: vm_store_create_device returned NULL");
panic("vm_create_null_region: vm_store_create_device returned NULL");
cache = vm_cache_create(store);
if(cache == NULL)
panic("vm_map_physical_memory: vm_cache_create returned NULL");
panic("vm_create_null_region: vm_cache_create returned NULL");
cache_ref = vm_cache_ref_create(cache);
if(cache_ref == NULL)
panic("vm_map_physical_memory: vm_cache_ref_create returned NULL");
panic("vm_create_null_region: vm_cache_ref_create returned NULL");
// tell the page scanner to skip over this region, it's pages are special
cache->scan_skip = 1;