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From: Jens Axboe <[email protected]>
To: "Michal Koutný" <[email protected]>,
	"Usama Arif" <[email protected]>
Cc: [email protected], [email protected],
	[email protected], [email protected]
Subject: Re: [PATCH v6 5/5] io_uring: remove ring quiesce for io_uring_register
Date: Fri, 15 Jul 2022 10:00:17 -0600	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 7/15/22 9:44 AM, Michal Koutn? wrote:
> Hello.
> 
> On Fri, Feb 04, 2022 at 02:51:17PM +0000, Usama Arif <[email protected]> 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?

Ah yes indeed, good catch! Would you mind sending that as an actual
patch?

-- 
Jens Axboe


  reply	other threads:[~2022-07-15 16:00 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-04 14:51 [PATCH v6 0/5] io_uring: remove ring quiesce in io_uring_register Usama Arif
2022-02-04 14:51 ` [PATCH v6 1/5] io_uring: remove trace for eventfd Usama Arif
2022-02-04 14:51 ` [PATCH v6 2/5] io_uring: avoid ring quiesce while registering/unregistering eventfd Usama Arif
2022-02-04 14:51 ` [PATCH v6 3/5] io_uring: avoid ring quiesce while registering async eventfd Usama Arif
2022-02-04 14:51 ` [PATCH v6 4/5] io_uring: avoid ring quiesce while registering restrictions and enabling rings Usama Arif
2022-02-04 14:51 ` [PATCH v6 5/5] io_uring: remove ring quiesce for io_uring_register Usama Arif
2022-07-15 15:44   ` Michal Koutný
2022-07-15 16:00     ` Jens Axboe [this message]
2022-07-15 17:45       ` [PATCH] io_uring: Don't require reinitable percpu_ref Michal Koutný
2022-07-15 17:54         ` Roman Gushchin
2022-07-15 18:22         ` Jens Axboe
2022-02-04 15:53 ` [PATCH v6 0/5] io_uring: remove ring quiesce in io_uring_register Jens Axboe
2022-02-04 16:19 ` Jens Axboe

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