linux-kernel - Re: [PATCH v2] mm/page-writeback: Update the comment of Dirty position control

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Message-ID: <20210511104540.GJ24154@quack2.suse.cz>
Date:   Tue, 11 May 2021 12:45:40 +0200
From:   Jan Kara <jack@...e.cz>
To:     Chi Wu <wuchi.zero@...il.com>
Cc:     jack@...e.cz, akpm@...ux-foundation.org, axboe@...com,
        hcochran@...nelspring.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, mszeredi@...hat.com, sedat.dilek@...il.com,
        tj@...nel.org
Subject: Re: [PATCH v2] mm/page-writeback: Update the comment of Dirty
 position control

On Tue 11-05-21 18:36:06, Chi Wu wrote:
> As the value of pos_ratio_polynom() clamp between 0 and
> 2LL << RATELIMIT_CALC_SHIFT, the global control line should be
> consistent with it.
> 
> Signed-off-by: Chi Wu <wuchi.zero@...il.com>

Thanks! Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  mm/page-writeback.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/page-writeback.c b/mm/page-writeback.c
> index 0062d5c57d41..3882405dc051 100644
> --- a/mm/page-writeback.c
> +++ b/mm/page-writeback.c
> @@ -845,7 +845,7 @@ static long long pos_ratio_polynom(unsigned long setpoint,
>   *     ^ pos_ratio
>   *     |
>   *     |            |<===== global dirty control scope ======>|
> - * 2.0 .............*
> + * 2.0  * * * * * * *
>   *     |            .*
>   *     |            . *
>   *     |            .   *
> -- 
> 2.17.1
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR