[patch 01/23] SLUB: Move count_partial()

Christoph Lameter
2007-11-07T01:12:57Z

[-- Attachment #1: 0002-slab_defrag_move_count_partial.patch --]
[-- Type: text/plain, Size: 1620 bytes --]

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.

[This patch is already in mm]

Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
mm/slub.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)

Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c 2007-11-06 12:34:13.000000000 -0800
+++ linux-2.6/mm/slub.c 2007-11-06 12:35:37.000000000 -0800
@@ -2758,6 +2758,19 @@ 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
@@ -3615,19 +3628,6 @@ static int list_locations(struct kmem_ca
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,

--