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Date:   Fri, 21 Jul 2023 21:19:37 +0530
Message-Id: <87r0p1jmcu.fsf@doe.com>
From:   Ritesh Harjani (IBM) <ritesh.list@gmail.com>
To:     Kemeng Shi <shikemeng@huaweicloud.com>, tytso@mit.edu,
        adilger.kernel@dilger.ca, ojaswin@linux.ibm.com,
        linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     shikemeng@huaweicloud.com
Subject: Re: [PATCH 10/10] ext4: correct some stale comment of criteria
In-Reply-To: <20230721171007.2065423-11-shikemeng@huaweicloud.com>
Precedence: bulk

Kemeng Shi <shikemeng@huaweicloud.com> writes:

> We named criteria with CR_XXX, correct stale comment to criteria with
> raw number.
>
> Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
> ---
>  fs/ext4/mballoc.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)


Looks good to me. Feel free to add: 

Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>

-ritesh

>
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index b04eceeab967..e30494f3d289 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -2778,8 +2778,8 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
>  
>  	/*
>  	 * ac->ac_2order is set only if the fe_len is a power of 2
> -	 * if ac->ac_2order is set we also set criteria to 0 so that we
> -	 * try exact allocation using buddy.
> +	 * if ac->ac_2order is set we also set criteria to CR_POWER2_ALIGNED
> +	 * so that we try exact allocation using buddy.
>  	 */
>  	i = fls(ac->ac_g_ex.fe_len);
>  	ac->ac_2order = 0;
> @@ -2836,8 +2836,8 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
>  			/*
>  			 * Batch reads of the block allocation bitmaps
>  			 * to get multiple READs in flight; limit
> -			 * prefetching at cr=0/1, otherwise mballoc can
> -			 * spend a lot of time loading imperfect groups
> +			 * prefetching at cr below CR_FAST, otherwise mballoc
> +			 * can spend a lot of time loading imperfect groups
>  			 */
>  			if ((prefetch_grp == group) &&
>  			    (cr >= CR_FAST ||
> -- 
> 2.30.0