Re: [PATCH v6 5/5] io_uring: remove ring quiesce for io_uring_register

[Michal Koutný <mkoutny@xxxxxxxx>]

Hello.

On Fri, Feb 04, 2022 at 02:51:17PM +0000, Usama Arif <usama.arif@xxxxxxxxxxxxx> wrote:
> -	percpu_ref_resurrect(ref);
> [...]
> -		percpu_ref_reinit(&ctx->refs);

It seems to me that this patch could have also changed

--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1911,7 +1911,7 @@ static __cold struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p)
        ctx->dummy_ubuf->ubuf = -1UL;

        if (percpu_ref_init(&ctx->refs, io_ring_ctx_ref_free,
-                           PERCPU_REF_ALLOW_REINIT, GFP_KERNEL))
+                           0, GFP_KERNEL))
                goto err;

        ctx->flags = p->flags;

Or are there any plans to still use the reinit/resurrect functionality
of the percpu counter?

Thanks,
Michal