zswap 分离读写请求降低竞争 · v4

Stores and loads serialize on the same per-CPU acomp request and mutex. A low-priority store can be preempted as soon as the compressor drops its stream lock, while it still holds the mutex. A higher-

From: Herbert Xu herbert@gondor.apana.org.au Enforce the limit MAX_SYNC_COMP_REQSIZE when an acomp tfm is initialised. All existing algorithms obey this limit. Signed-off-by: Herbert Xu <herbert@

With separate requests for compression and decompression, loads still serialize on the per-CPU decompression mutex. A low-priority load that is preempted after the codec drops its stream lock keeps ho