On 7/24/19 8:11 AM, Daniel Kozak wrote: > Hi, > > I am playing with io_uring interface and for some reason it is causing > freezing my pc. Here is some example code which cause this: > > https://bitbucket.org/kozzi11/uring_hang/src/master/main.c > > When runing this and test it with wrk (https://github.com/wg/wrk) : > wrk --latency -d 15 -c 2048 --timeout 8 -t 8 http://localhost:8080/ > > it completly hang pc. > > Thank you for any hint if there is something wrong with way how I am > using io_uring interface or it is a bug in io_uring itself. > > Daniel Kozak > Does this help? diff --git a/fs/io_uring.c b/fs/io_uring.c index 7343d655f247..fb94cfe0ff3a 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1599,7 +1599,7 @@ static int io_poll_wake(struct wait_queue_entry *wait, unsigned mode, int sync, list_del_init(&poll->wait.entry); if (mask && spin_trylock_irqsave(&ctx->completion_lock, flags)) { - list_del(&req->list); + list_del_init(&req->list); io_poll_complete(ctx, req, mask); spin_unlock_irqrestore(&ctx->completion_lock, flags); -- Jens Axboe
