Commit c34b025f authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring: cache __io_free_req()'d requests 



Don't kfree requests in __io_free_req() but put them back into the
internal request cache. That makes allocations more sustainable and will
be used for refcounting optimisations.

Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/9f4950fbe7771c8d41799366d0a3a08ac3040236.1628536684.git.asml.silence@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent f56165e6

fs/io_uring.c

+6 −1
Original line number Diff line number Diff line
@@ -1831,11 +1831,16 @@ static void io_dismantle_req(struct io_kiocb *req) 
static void __io_free_req(struct io_kiocb *req)

{

	struct io_ring_ctx *ctx = req->ctx;

	unsigned long flags;



	io_dismantle_req(req);

	io_put_task(req->task, 1);



	kmem_cache_free(req_cachep, req);

	spin_lock_irqsave(&ctx->completion_lock, flags);

	list_add(&req->compl.list, &ctx->locked_free_list);

	ctx->locked_free_nr++;

	spin_unlock_irqrestore(&ctx->completion_lock, flags);



	percpu_ref_put(&ctx->refs);

}