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| author |   Pavel Begunkov <asml.silence@gmail.com> | 2021-03-06 11:02:16 +0000 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-03-07 14:12:43 -0700 |
| commit | b5bb3a24f69da92e0ec2a301452364333e45be03 (patch) | |
| tree | dafb21ad1a2543c98cf66393d3c7631012c14360 /fs/io_uring.c | |
| parent | io_uring: index io_uring->xa by ctx not file (diff) | |
| download | linux-dev-b5bb3a24f69da92e0ec2a301452364333e45be03.tar.xz linux-dev-b5bb3a24f69da92e0ec2a301452364333e45be03.zip | |
io_uring: warn when ring exit takes too long
We use system_unbound_wq to run io_ring_exit_work(), so it's hard to
monitor whether removal hang or not. Add WARN_ONCE to catch hangs.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 01a7fa4a4889..945e54690b81 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -8560,6 +8560,7 @@ static void io_tctx_exit_cb(struct callback_head *cb) static void io_ring_exit_work(struct work_struct *work) { struct io_ring_ctx *ctx = container_of(work, struct io_ring_ctx, exit_work); + unsigned long timeout = jiffies + HZ * 60 * 5; struct io_tctx_exit exit; struct io_tctx_node *node; int ret; @@ -8572,10 +8573,14 @@ static void io_ring_exit_work(struct work_struct *work) */ do { io_uring_try_cancel_requests(ctx, NULL, NULL); + + WARN_ON_ONCE(time_after(jiffies, timeout)); } while (!wait_for_completion_timeout(&ctx->ref_comp, HZ/20)); mutex_lock(&ctx->uring_lock); while (!list_empty(&ctx->tctx_list)) { + WARN_ON_ONCE(time_after(jiffies, timeout)); + node = list_first_entry(&ctx->tctx_list, struct io_tctx_node, ctx_node); exit.ctx = ctx; |