linux-ext4 - Re: [PATCH v3 10/10] ext4: correct some stale comment of criteria

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Message-Id: <87v8dyw8ar.fsf@doe.com>
Date:   Wed, 02 Aug 2023 06:48:52 +0530
From:   Ritesh Harjani (IBM) <ritesh.list@...il.com>
To:     Kemeng Shi <shikemeng@...weicloud.com>, tytso@....edu,
        adilger.kernel@...ger.ca, ojaswin@...ux.ibm.com,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     shikemeng@...weicloud.com
Subject: Re: [PATCH v3 10/10] ext4: correct some stale comment of criteria

Kemeng Shi <shikemeng@...weicloud.com> writes:

> We named criteria with CR_XXX, correct stale comment to criteria with
> raw number.
>
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
> ---
>  fs/ext4/mballoc.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index bfaab173a3f4..1e8ce0ece47a 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -2782,8 +2782,8 @@ 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;
> @@ -2840,8 +2840,8 @@ 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 inexpensive CR, otherwise mballoc
> +			 * can spend a lot of time loading imperfect groups
>  			 */
>  			if ((prefetch_grp == group) &&
>  			    (ext4_mb_cr_expensive(cr) ||
Is this function defined at any place ^^^

-ritesh