[RFC 02/26] SLUB: Move count_partial()

Christoph Lameter
2007-09-01T01:42:35Z

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Move the counting function for objects in partial slabs so that it is placed
before kmem_cache_shrink. We will need to use it to establish the
fragmentation ratio of per node slab lists.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
mm/slub.c | 26 +++++++++++++-------------
1 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 45c76fe..aad6f83 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2595,6 +2595,19 @@ void kfree(const void *x)
}
EXPORT_SYMBOL(kfree);

+static unsigned long count_partial(struct kmem_cache_node *n)
+{
+ unsigned long flags;
+ unsigned long x = 0;
+ struct page *page;
+
+ spin_lock_irqsave(&n->list_lock, flags);
+ list_for_each_entry(page, &n->partial, lru)
+ x += page->inuse;
+ spin_unlock_irqrestore(&n->list_lock, flags);
+ return x;
+}
+
/*
* kmem_cache_shrink removes empty slabs from the partial lists and sorts
* the remaining slabs by the number of items in use. The slabs with the
@@ -3331,19 +3344,6 @@ static int list_locations(struct kmem_cache *s, char *buf,
return n;
}

-static unsigned long count_partial(struct kmem_cache_node *n)
-{
- unsigned long flags;
- unsigned long x = 0;
- struct page *page;
-
- spin_lock_irqsave(&n->list_lock, flags);
- list_for_each_entry(page, &n->partial, lru)
- x += page->inuse;
- spin_unlock_irqrestore(&n->list_lock, flags);
- return x;
-}
-
enum slab_stat_type {
SL_FULL,
SL_PARTIAL,
--
1.5.2.4

--