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[RFC,01/11] ext4: mballoc: Remove useless setting of ac_criteria

Message ID 08aadf4fd475d87020c60792d81276a28d7176c1.1674822311.git.ojaswin@linux.ibm.com (mailing list archive)
State New
Headers show
Series multiblock allocator improvements | expand

Commit Message

Ojaswin Mujoo Jan. 27, 2023, 12:37 p.m. UTC 
There will be changes coming in future patches which will introduce a new
criteria for block allocation. This removes the useless setting of ac_criteria.
AFAIU, this might be only used to differentiate between whether a preallocated
blocks was allocated or was regular allocator called for allocating blocks.
Hence this also adds the debug prints to identify what type of block allocation
was done in ext4_mb_show_ac().

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
---
 fs/ext4/mballoc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Comments

Jan Kara March 9, 2023, 11:36 a.m. UTC | #1 
On Fri 27-01-23 18:07:28, Ojaswin Mujoo wrote:
> There will be changes coming in future patches which will introduce a new
> criteria for block allocation. This removes the useless setting of ac_criteria.
> AFAIU, this might be only used to differentiate between whether a preallocated
> blocks was allocated or was regular allocator called for allocating blocks.
> Hence this also adds the debug prints to identify what type of block allocation
> was done in ext4_mb_show_ac().
> 
> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
> Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>

Looks good. Feel free to add:

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

								Honza

> ---
>  fs/ext4/mballoc.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index 5b2ae37a8b80..572e79a698d4 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -4391,7 +4391,6 @@ ext4_mb_use_preallocated(struct ext4_allocation_context *ac)
>  			atomic_inc(&pa->pa_count);
>  			ext4_mb_use_inode_pa(ac, pa);
>  			spin_unlock(&pa->pa_lock);
> -			ac->ac_criteria = 10;
>  			rcu_read_unlock();
>  			return true;
>  		}
> @@ -4434,7 +4433,6 @@ ext4_mb_use_preallocated(struct ext4_allocation_context *ac)
>  	}
>  	if (cpa) {
>  		ext4_mb_use_group_pa(ac, cpa);
> -		ac->ac_criteria = 20;
>  		return true;
>  	}
>  	return false;
> @@ -5131,6 +5129,10 @@ static void ext4_mb_show_ac(struct ext4_allocation_context *ac)
>  			(unsigned long)ac->ac_b_ex.fe_logical,
>  			(int)ac->ac_criteria);
>  	mb_debug(sb, "%u found", ac->ac_found);
> +	mb_debug(sb, "used pa: %s, ", ac->ac_pa ? "yes" : "no");
> +	if (ac->ac_pa)
> +		mb_debug(sb, "pa_type %s\n", ac->ac_pa->pa_type == MB_GROUP_PA ?
> +			 "group pa" : "inode pa");
>  	ext4_mb_show_pa(sb);
>  }
>  #else
> -- 
> 2.31.1
>
diff mbox series

Patch

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 5b2ae37a8b80..572e79a698d4 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4391,7 +4391,6 @@  ext4_mb_use_preallocated(struct ext4_allocation_context *ac)
 			atomic_inc(&pa->pa_count);
 			ext4_mb_use_inode_pa(ac, pa);
 			spin_unlock(&pa->pa_lock);
-			ac->ac_criteria = 10;
 			rcu_read_unlock();
 			return true;
 		}
@@ -4434,7 +4433,6 @@  ext4_mb_use_preallocated(struct ext4_allocation_context *ac)
 	}
 	if (cpa) {
 		ext4_mb_use_group_pa(ac, cpa);
-		ac->ac_criteria = 20;
 		return true;
 	}
 	return false;
@@ -5131,6 +5129,10 @@  static void ext4_mb_show_ac(struct ext4_allocation_context *ac)
 			(unsigned long)ac->ac_b_ex.fe_logical,
 			(int)ac->ac_criteria);
 	mb_debug(sb, "%u found", ac->ac_found);
+	mb_debug(sb, "used pa: %s, ", ac->ac_pa ? "yes" : "no");
+	if (ac->ac_pa)
+		mb_debug(sb, "pa_type %s\n", ac->ac_pa->pa_type == MB_GROUP_PA ?
+			 "group pa" : "inode pa");
 	ext4_mb_show_pa(sb);
 }
 #else