zswap 批量压缩存储 · v2

We add a new @unit_size data member to struct acomp_req along with a helper function acomp_request_set_unit_size() for kernel modules to set the unit size to use while breaking down the request’s src/

This patch adds segmentation support for compression. Add a bit to the crypto_alg flags to indicate support for segmentation. Also add a helper for acomp to test whether a given tfm supports segmenta

This patch provides a wrapper for existing algorithms so that they can accept a single segment while returning the compressed length or error through the dst SG list length. This trivial segmentation

This commit adds a @batch_size data member to struct acomp_alg. An acomp_alg compression algorithm that supports batching of compressions and decompressions must provide a @batch_size greater than 1,

When storing a folio in zswap, save the folio’s node id in the zswap entry instead of relying on the zswap_entry being allocated on the same node. This enables optimizations such as batch allocation o

Use batching when storing large folios in zswap. If the underlying compressor supports batching (e.g. hardware parallel compression), allocate multiple compression buffers, otherwise allocate one. The

A new batching implementation of zswap_compress() is provided for compressors that do and do not support batching. This eliminates code duplication and facilitates code maintainability with the introd

This various stages of zswap_store_pages() are broken down into routines that work on a batch of data when a large folio is being processed: zswap_init_entries() zswap_compress() zswap_tree_stores