From: Jens Axboe Date: Tue, 3 Dec 2019 01:51:26 +0000 (-0700) Subject: io_uring: mark us with IORING_FEAT_SUBMIT_STABLE X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=da8c96906990f1108cb626ee7865e69267a3263b;p=linux.git io_uring: mark us with IORING_FEAT_SUBMIT_STABLE If this flag is set, applications can be certain that any data for async offload has been consumed when the kernel has consumed the SQE. Signed-off-by: Jens Axboe --- diff --git a/fs/io_uring.c b/fs/io_uring.c index 5fcd89c507ec2..c47a08afcee50 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5077,7 +5077,8 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p) if (ret < 0) goto err; - p->features = IORING_FEAT_SINGLE_MMAP | IORING_FEAT_NODROP; + p->features = IORING_FEAT_SINGLE_MMAP | IORING_FEAT_NODROP | + IORING_FEAT_SUBMIT_STABLE; trace_io_uring_create(ret, ctx, p->sq_entries, p->cq_entries, p->flags); return ret; err: diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 4637ed1d99496..eabccb46edd12 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -157,6 +157,7 @@ struct io_uring_params { */ #define IORING_FEAT_SINGLE_MMAP (1U << 0) #define IORING_FEAT_NODROP (1U << 1) +#define IORING_FEAT_SUBMIT_STABLE (1U << 2) /* * io_uring_register(2) opcodes and arguments