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io_uring: introduce io_cache_free() helper

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Add a helper function io_cache_free() that returns an allocation to a
io_alloc_cache, falling back on kfree() if the io_alloc_cache is full.
This is the inverse of io_cache_alloc(), which takes an allocation from
an io_alloc_cache and falls back on kmalloc() if the cache is empty.

Convert 4 callers to use the helper.

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Suggested-by: Li Zetao <lizetao1@huawei.com>
Link: https://lore.kernel.org/r/20250304194814.2346705-1-csander@purestorage.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Caleb Sander Mateos
2025-03-04 12:48:12 -07:00
committed by Jens Axboe
parent fe21a4532e
commit 0d83b8a9f1
4 changed files with 13 additions and 15 deletions
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4
io_uring/futex.c
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@@ -53,12 +53,10 @@ static void __io_futex_complete(struct io_kiocb *req, io_tw_token_t tw)
static void io_futex_complete(struct io_kiocb *req, io_tw_token_t tw)
{
struct io_futex_data *ifd = req->async_data;
struct io_ring_ctx *ctx = req->ctx;
io_tw_lock(ctx, tw);
if (!io_alloc_cache_put(&ctx->futex_cache, ifd))
kfree(ifd);
io_cache_free(&ctx->futex_cache, req->async_data);
__io_futex_complete(req, tw);
}