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kernel/vm: Don't commit memory for null and physical map areas.

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The implementation does nothing at present besides change the
committed_size value of the cache, and in future commits will ASSERT.
This commit is contained in:
Augustin Cavalier
2024-10-02 15:39:40 -04:00
parent 4b15d71999
commit 502591624e
1 changed files with 3 additions and 3 deletions
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src/system/kernel/vm/vm.cpp
+3 -3
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@@ -1939,8 +1939,8 @@ vm_map_physical_memory(team_id team, const char* name, void** _address,
addressRestrictions.address = *_address;
addressRestrictions.address_specification = addressSpec & ~B_MEMORY_TYPE_MASK;
status = map_backing_store(locker.AddressSpace(), cache, 0, name, size,
B_FULL_LOCK, protection, 0, REGION_NO_PRIVATE_MAP, 0, &addressRestrictions,
true, &area, _address);
B_FULL_LOCK, protection, 0, REGION_NO_PRIVATE_MAP, CREATE_AREA_DONT_COMMIT_MEMORY,
&addressRestrictions, true, &area, _address);
if (status < B_OK)
cache->ReleaseRefLocked();
@@ -2145,7 +2145,7 @@ vm_create_null_area(team_id team, const char* name, void** address,
addressRestrictions.address_specification = addressSpec;
status = map_backing_store(locker.AddressSpace(), cache, 0, name, size,
B_LAZY_LOCK, B_KERNEL_READ_AREA, B_KERNEL_READ_AREA,
REGION_NO_PRIVATE_MAP, flags,
REGION_NO_PRIVATE_MAP, flags | CREATE_AREA_DONT_COMMIT_MEMORY,
&addressRestrictions, true, &area, address);
if (status < B_OK) {