Module bitmap

Structs

AtomicBitmapMmap

AtomicBitmapMmap implements a simple memory-mapped bitmap on the page level with test and set operations. The main use case is to support live migration on vhost-user backends (see VHOST_USER_PROTOCOL_F_LOG_SHMFD and VHOST_USER_SET_LOG_BASE in the vhost-user protocol specification). It uses a fixed memory page size of LOG_PAGE_SIZE bytes, so it converts addresses to page numbers before setting or clearing the bits.

BitmapMmapRegion

BitmapMmapRegion implements a bitmap tha can be replaced at runtime. The main use case is to support live migration on vhost-user backends (see VHOST_USER_PROTOCOL_F_LOG_SHMFD and VHOST_USER_SET_LOG_BASE in the vhost-user protocol specification). It uses a fixed memory page size of VHOST_LOG_PAGE bytes (i.e., 4096 bytes), so it converts addresses to page numbers before setting or clearing the bits.

MmapLogReg

MmaplogReg mmaps the frontend bitmap backing memory in the current process.

Traits

BitmapReplace

A Bitmap with an internal Bitmap that can be replaced at runtime

MemRegionBitmap

A bitmap relative to a memory region