release_mem_region_adjustable9
Release a previously reserved memory region
Usage
int release_mem_region_adjustable(struct resource * parent, resource_size_t start, resource_size_t size);
Arguments
parent
parent resource descriptor
start
resource start address
size
resource region size
Overview
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.
Releases
2 releases since Debian 8 (Jessie); the text changed 1 time.