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kernel/vm: Notify the low_resource manager on low_resource address space.

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We cannot wait here, but now that the low_resource manager actually
does something with the information it is provided, we can invoke it.
This commit is contained in:
Augustin Cavalier 2022-03-09 18:17:35 -05:00
parent 42ed7815ff
commit d38d90de25
1 changed files with 3 additions and 5 deletions
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8
src/system/kernel/vm/vm.cpp
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@ -1014,11 +1014,9 @@ map_backing_store(VMAddressSpace* addressSpace, VMCache* cache, off_t offset,
allocationFlags, _virtualAddress); allocationFlags, _virtualAddress);
if (status == B_NO_MEMORY if (status == B_NO_MEMORY
&& addressRestrictions->address_specification == B_ANY_KERNEL_ADDRESS) { && addressRestrictions->address_specification == B_ANY_KERNEL_ADDRESS) {
// TODO: At present, there is no way to notify the low_resource monitor // Due to how many locks are held, we cannot wait here for space to be
// that kernel addresss space is fragmented, nor does it check for this // freed up, but we can at least notify the low_resource handler.
// automatically. Due to how many locks are held, we cannot wait here low_resource(B_KERNEL_RESOURCE_ADDRESS_SPACE, size, B_RELATIVE_TIMEOUT, 0);
// for space to be freed up, but it would be good to at least notify
// that we tried and failed to allocate some amount.
} }
if (status != B_OK) if (status != B_OK)
goto err2; goto err2;