diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 356000255211..9d523fafacb7 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -986,11 +986,11 @@ static void ctx_flush_and_put(struct io_ring_ctx *ctx, bool *locked) percpu_ref_put(&ctx->refs); } - static void handle_tw_list(struct llist_node *node, - struct io_ring_ctx **ctx, bool *locked) + struct io_ring_ctx **ctx, bool *locked, + struct llist_node *last) { - do { + while (node != last) { struct llist_node *next = node->next; struct io_kiocb *req = container_of(node, struct io_kiocb, io_task_work.node); @@ -1006,7 +1006,7 @@ static void handle_tw_list(struct llist_node *node, } req->io_task_work.func(req, locked); node = next; - } while (node); + } } /** @@ -1045,11 +1045,15 @@ void tctx_task_work(struct callback_head *cb) struct io_ring_ctx *ctx = NULL; struct io_uring_task *tctx = container_of(cb, struct io_uring_task, task_work); - struct llist_node *node = llist_del_all(&tctx->task_list); + struct llist_node fake = {}; + struct llist_node *node = io_llist_xchg(&tctx->task_list, &fake); - if (node) { - handle_tw_list(node, &ctx, &uring_locked); - cond_resched(); + handle_tw_list(node, &ctx, &uring_locked, NULL); + node = io_llist_cmpxchg(&tctx->task_list, &fake, NULL); + while (node != &fake) { + node = io_llist_xchg(&tctx->task_list, &fake); + handle_tw_list(node, &ctx, &uring_locked, &fake); + node = io_llist_cmpxchg(&tctx->task_list, &fake, NULL); } ctx_flush_and_put(ctx, &uring_locked);