Re: [PATCH] ext4: Convert the usage of NR_CPUS to nr_cpu_ids.

[Eric Sandeen <sandeen@redhat.com>]

Aneesh Kumar K.V wrote:
> NR_CPUS can be really large. We should be using nr_cpu_ids
> instead.

Yep, thanks,  I thought we got rid of these at some point but guess not
(or not all)!

> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Acked-by: Eric Sandeen <sandeen@redhat.com>

> ---
>  fs/ext4/mballoc.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index 9db0f4d..5b854b7 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -2541,7 +2541,7 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery)
>  	sbi->s_mb_history_filter = EXT4_MB_HISTORY_DEFAULT;
>  	sbi->s_mb_group_prealloc = MB_DEFAULT_GROUP_PREALLOC;
>  
> -	i = sizeof(struct ext4_locality_group) * NR_CPUS;
> +	i = sizeof(struct ext4_locality_group) * nr_cpu_ids;
>  	sbi->s_locality_groups = kmalloc(i, GFP_KERNEL);
>  	if (sbi->s_locality_groups == NULL) {
>  		clear_opt(sbi->s_mount_opt, MBALLOC);
> @@ -2549,7 +2549,7 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery)
>  		kfree(sbi->s_mb_maxs);
>  		return -ENOMEM;
>  	}
> -	for (i = 0; i < NR_CPUS; i++) {
> +	for (i = 0; i < nr_cpu_ids; i++) {
>  		struct ext4_locality_group *lg;
>  		lg = &sbi->s_locality_groups[i];
>  		mutex_init(&lg->lg_mutex);