release_mem_region_adjustable (9) - Linux Manuals
release_mem_region_adjustable: release a previously reserved memory region
NAME
release_mem_region_adjustable - release a previously reserved memory region
SYNOPSIS
-
int release_mem_region_adjustable(struct resource
* parent, resource_size_tstart, resource_size_t size);
ARGUMENTS
parent
-
- parent resource descriptor
start
- resource start address
size
- resource region size
DESCRIPTION
This interface is intended for memory hot-delete. The requested region is released from a currently busy memory resource. The requested region must either match exactly or fit into a single busy resource entry. In the latter case, the remaining resource is adjusted accordingly. Existing children of the busy memory resource must be immutable in the request.
NOTE
- Additional release conditions, such as overlapping region, can be supported after they are confirmed as valid cases. - When a busy memory resource gets split into two entries, the code assumes that all children remain in the lower address entry for simplicity. Enhance this logic when necessary.
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