The patch titled
Subject: mm/slab.c: add a helper function get_first_slab
has been added to the -mm tree. Its filename is
mm-slabc-add-a-helper-function-get_first_slab.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-slabc-add-a-helper-function-get_first_slab.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-slabc-add-a-helper-function-get_first_slab.patch
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------------------------------------------------------
From: Geliang Tang <geliangtang@xxxxxxx>
Subject: mm/slab.c: add a helper function get_first_slab
Add a new helper function get_first_slab() that get the first slab from a
kmem_cache_node.
Signed-off-by: Geliang Tang <geliangtang@xxxxxxx>
Acked-by: Christoph Lameter <cl@xxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slab.c | 39 +++++++++++++++++++++------------------
1 file changed, 21 insertions(+), 18 deletions(-)
diff -puN mm/slab.c~mm-slabc-add-a-helper-function-get_first_slab mm/slab.c
--- a/mm/slab.c~mm-slabc-add-a-helper-function-get_first_slab
+++ a/mm/slab.c
@@ -2756,6 +2756,21 @@ static void *cache_free_debugcheck(struc
#define cache_free_debugcheck(x,objp,z) (objp)
#endif
+static struct page *get_first_slab(struct kmem_cache_node *n)
+{
+ struct page *page;
+
+ page = list_first_entry_or_null(&n->slabs_partial,
+ struct page, lru);
+ if (!page) {
+ n->free_touched = 1;
+ page = list_first_entry_or_null(&n->slabs_free,
+ struct page, lru);
+ }
+
+ return page;
+}
+
static void *cache_alloc_refill(struct kmem_cache *cachep, gfp_t flags,
bool force_refill)
{
@@ -2793,15 +2808,9 @@ retry:
while (batchcount > 0) {
struct page *page;
/* Get slab alloc is to come from. */
- page = list_first_entry_or_null(&n->slabs_partial,
- struct page, lru);
- if (!page) {
- n->free_touched = 1;
- page = list_first_entry_or_null(&n->slabs_free,
- struct page, lru);
- if (!page)
- goto must_grow;
- }
+ page = get_first_slab(n);
+ if (!page)
+ goto must_grow;
check_spinlock_acquired(cachep);
@@ -3097,15 +3106,9 @@ static void *____cache_alloc_node(struct
retry:
check_irq_off();
spin_lock(&n->list_lock);
- page = list_first_entry_or_null(&n->slabs_partial,
- struct page, lru);
- if (!page) {
- n->free_touched = 1;
- page = list_first_entry_or_null(&n->slabs_free,
- struct page, lru);
- if (!page)
- goto must_grow;
- }
+ page = get_first_slab(n);
+ if (!page)
+ goto must_grow;
check_spinlock_acquired_node(cachep, nodeid);
_
Patches currently in -mm which might be from geliangtang@xxxxxxx are
fsnotify-use-list_next_entry-in-fsnotify_unmount_inodes.patch
mm-slab-use-list_first_entry_or_null.patch
mm-slab-use-list_for_each_entry-in-cache_flusharray.patch
mm-slabc-add-a-helper-function-get_first_slab.patch
mm-vmalloc-use-list_nextfirst_entry.patch
mm-thp-use-list_first_entry_or_null.patch
mm-page_allocc-use-list_firstlast_entry-instead-of-list_entry.patch
mm-page_allocc-use-list_for_each_entry-in-mark_free_pages.patch
mm-swapfilec-use-list_nextfirst_entry.patch
dma-mapping-use-offset_in_page-macro.patch
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