Re: [PATCH v7 07/34] shrinker: convert superblock shrinkers to new API

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On 05/20/2013 12:07 AM, Glauber Costa wrote:
> +static long super_cache_count(struct shrinker *shrink, struct shrink_control *sc)
> +{
> +	struct super_block *sb;
> +	long	total_objects = 0;
> +
> +	sb = container_of(shrink, struct super_block, s_shrink);
> +
> +	if (!grab_super_passive(sb))
> +		return -1;

Dave,

This is wrong, since mm/vmscan.c will WARN on count returning -1.
Only scan can return -1, and this is probably a mistake while moving
code over. Unless you shout, I am fixing this to "return 0" in this case.


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