linux-toradex.git/io_uring/alloc_cache.h, branch v6.0-rc1 Linux kernel for Apalis and Colibri modules io_uring: impose max limit on apoll cache 2022-07-25T00:39:17+00:00 Jens Axboe axboe@kernel.dk 2022-07-07T20:20:54+00:00 9731bc9855dc169f27433fef3c4d0ff3496c512d Caches like this tend to grow to the peak size, and then never get any smaller. Impose a max limit on the size, to prevent it from growing too big. A somewhat randomly chosen 512 is the max size we'll allow the cache to get. If a batch of frees come in and would bring it over that, we simply start kfree'ing the surplus. Signed-off-by: Jens Axboe <axboe@kernel.dk> 
Caches like this tend to grow to the peak size, and then never get any
smaller. Impose a max limit on the size, to prevent it from growing too
big.

A somewhat randomly chosen 512 is the max size we'll allow the cache
to get. If a batch of frees come in and would bring it over that, we
simply start kfree'ing the surplus.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
io_uring: add abstraction around apoll cache 2022-07-25T00:39:17+00:00 Jens Axboe axboe@kernel.dk 2022-07-07T20:16:20+00:00 9b797a37c4bd83b03cedcfbd15852b836f5e562c In preparation for adding limits, and one more user, abstract out the core bits of the allocation+free cache. Signed-off-by: Jens Axboe <axboe@kernel.dk> 
In preparation for adding limits, and one more user, abstract out the
core bits of the allocation+free cache.

Signed-off-by: Jens Axboe <axboe@kernel.dk>