mmtk::policy::marksweepspace::malloc_ms::metadata

Constant ACTIVE_PAGE_METADATA_SPEC

source 
pub(crate) const ACTIVE_PAGE_METADATA_SPEC: SideMetadataSpec;
Expand description

Metadata spec for the active page byte

The active page metadata is used to accurately track the total number of pages that have been reserved by malloc().

We use a byte instead of a bit to avoid synchronization costs, i.e. to avoid the case where two threads try to update different bits in the same byte at the same time