From: Pavel Begunkov Date: Fri, 26 Feb 2021 15:47:56 +0000 (+0000) Subject: io_uring: run fallback on cancellation X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ba50a036f23c44608b1d903c34644a1acd5d21fa;p=linux.git io_uring: run fallback on cancellation io_uring_try_cancel_requests() matches not only current's requests, but also of other exiting tasks, so we need to actively cancel them and not just wait, especially since the function can be called on flush during do_exit() -> exit_files(). Even if it's not a problem for now, it's much nicer to know that the function tries to cancel everything it can. Signed-off-by: Pavel Begunkov Signed-off-by: Jens Axboe --- diff --git a/fs/io_uring.c b/fs/io_uring.c index d55c9ab6314a1..9d6696ff5748d 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -8518,9 +8518,10 @@ static int io_remove_personalities(int id, void *p, void *data) return 0; } -static void io_run_ctx_fallback(struct io_ring_ctx *ctx) +static bool io_run_ctx_fallback(struct io_ring_ctx *ctx) { struct callback_head *work, *head, *next; + bool executed = false; do { do { @@ -8537,7 +8538,10 @@ static void io_run_ctx_fallback(struct io_ring_ctx *ctx) work = next; cond_resched(); } while (work); + executed = true; } while (1); + + return executed; } static void io_ring_exit_work(struct work_struct *work) @@ -8677,6 +8681,7 @@ static void io_uring_try_cancel_requests(struct io_ring_ctx *ctx, ret |= io_poll_remove_all(ctx, task, files); ret |= io_kill_timeouts(ctx, task, files); ret |= io_run_task_work(); + ret |= io_run_ctx_fallback(ctx); io_cqring_overflow_flush(ctx, true, task, files); if (!ret) break;