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SubjectRe: [PATCH 05/13] mm: convert shrinkers to use new API
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On Tue, 2011-08-23 at 18:56 +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
>
> Modify shrink_slab() to use the new .count_objects/.scan_objects API
> and implement the callouts for all the existing shrinkers.

> +static long
> +cifs_idmap_shrinker_scan(struct shrinker *shrink, struct shrink_control *sc)
> {
> - int nr_to_scan = sc->nr_to_scan;
> - int nr_del = 0;
> - int nr_rem = 0;
> struct rb_root *root;
> + long freed;
>
> root = &uidtree;
> spin_lock(&siduidlock);
> - shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
> + freed = shrink_idmap_tree(root, sc->nr_to_scan);
> spin_unlock(&siduidlock);
>
> root = &gidtree;
> spin_lock(&sidgidlock);
> - shrink_idmap_tree(root, nr_to_scan, &nr_rem, &nr_del);
> + freed += shrink_idmap_tree(root, sc->nr_to_scan);
> spin_unlock(&sidgidlock);
>
> - return nr_rem;
> + return freed;
> +}
> +
> +/*
> + * This still abuses the nr_to_scan == 0 trick to get the common code just to
> + * count objects. There neds to be an external count of the objects in the

^^^^^?
Hi Dave:
Great work. a bit comments.
Thanks
-Wanlong Gao




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