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Subject[RFC 1/7] slub: Replace ctor field with ops field in /sys/slab/*
Create an ops field in /sys/slab/*/ops to contain all the callback
operations defined for a slab cache. This will be used to display
the additional callbacks that will be defined soon to enable
defragmentation.

Display the existing ctor callback in the ops fields contents.

Signed-off-by: Christoph Lameter <cl@linux.com>

---
mm/slub.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)

Index: linux/mm/slub.c
===================================================================
--- linux.orig/mm/slub.c
+++ linux/mm/slub.c
@@ -4994,13 +4994,18 @@ static ssize_t cpu_partial_store(struct
}
SLAB_ATTR(cpu_partial);

-static ssize_t ctor_show(struct kmem_cache *s, char *buf)
+static ssize_t ops_show(struct kmem_cache *s, char *buf)
{
+ int x = 0;
+
if (!s->ctor)
return 0;
- return sprintf(buf, "%pS\n", s->ctor);
+
+ if (s->ctor)
+ x += sprintf(buf + x, "ctor : %pS\n", s->ctor);
+ return x;
}
-SLAB_ATTR_RO(ctor);
+SLAB_ATTR_RO(ops);

static ssize_t aliases_show(struct kmem_cache *s, char *buf)
{
@@ -5413,7 +5418,7 @@ static struct attribute *slab_attrs[] =
&objects_partial_attr.attr,
&partial_attr.attr,
&cpu_slabs_attr.attr,
- &ctor_attr.attr,
+ &ops_attr.attr,
&aliases_attr.attr,
&align_attr.attr,
&hwcache_align_attr.attr,
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