io_uring: iterate req cache backwards (6c8a3134) · Commits · 戴 / test

fs/io_uring.c

+4 −8

Original line number	Diff line number	Diff line
		@@ -586,7 +586,6 @@ struct io_submit_state {
		*/
		void *reqs[IO_IOPOLL_BATCH];
		unsigned int free_reqs;
		unsigned int cur_req;

		/*
		* File reference cache
		@@ -1190,12 +1189,10 @@ static struct io_kiocb io_get_req(struct io_ring_ctx ctx,
		ret = 1;
		}
		state->free_reqs = ret - 1;
		state->cur_req = 1;
		req = state->reqs[0];
		req = state->reqs[ret - 1];
		} else {
		req = state->reqs[state->cur_req];
		state->free_reqs--;
		state->cur_req++;
		req = state->reqs[state->free_reqs];
		}

		got_it:
		@@ -4849,8 +4846,7 @@ static void io_submit_state_end(struct io_submit_state *state)
		blk_finish_plug(&state->plug);
		io_file_put(state);
		if (state->free_reqs)
		kmem_cache_free_bulk(req_cachep, state->free_reqs,
		&state->reqs[state->cur_req]);
		kmem_cache_free_bulk(req_cachep, state->free_reqs, state->reqs);
		}

		/*