From 7d481e0356334eb2de254414769b4bed4b2a8827 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Thu, 13 Apr 2023 15:28:09 +0100 Subject: io_uring/rsrc: fix DEFER_TASKRUN rsrc quiesce For io_rsrc_ref_quiesce() to progress it should execute all task_work items, including deferred ones. However, currently nobody would wake us, and so let's set ctx->cq_wait_nr, so io_req_local_work_add() would wake us up. Fixes: c0e0d6ba25f18 ("io_uring: add IORING_SETUP_DEFER_TASKRUN") Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/f1a90d1bc5ebf096475b018fed52e54f3b89d4af.1681395792.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- io_uring/rsrc.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'io_uring') diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c index f9ce4076c73d..e634ef384724 100644 --- a/io_uring/rsrc.c +++ b/io_uring/rsrc.c @@ -273,6 +273,11 @@ __cold static int io_rsrc_ref_quiesce(struct io_rsrc_data *data, if (io_put_rsrc_data_ref(data)) return 0; + if (ctx->flags & IORING_SETUP_DEFER_TASKRUN) { + atomic_set(&ctx->cq_wait_nr, 1); + smp_mb(); + } + data->quiesce = true; do { prepare_to_wait(&ctx->rsrc_quiesce_wq, &we, TASK_INTERRUPTIBLE); @@ -298,6 +303,10 @@ __cold static int io_rsrc_ref_quiesce(struct io_rsrc_data *data, finish_wait(&ctx->rsrc_quiesce_wq, &we); data->quiesce = false; + if (ctx->flags & IORING_SETUP_DEFER_TASKRUN) { + atomic_set(&ctx->cq_wait_nr, 0); + smp_mb(); + } return ret; } -- cgit v1.2.3