From: Christoph Lameter <cl@linux.com>
To: Pekka Enberg <penberg@kernel.org>
Cc: linux-mm@kvack.org, David Rientjes <rientjes@google.com>
Subject: [Slub cleanup 7/9] slub: Separate out kmem_cache_cpu processing from deactivate_slab
Date: Mon, 23 Jan 2012 14:16:53 -0600 [thread overview]
Message-ID: <20120123201709.433927049@linux.com> (raw)
In-Reply-To: 20120123201646.924319545@linux.com
[-- Attachment #1: separate_deactivate_slab --]
[-- Type: text/plain, Size: 2663 bytes --]
Processing on fields of kmem_cache_cpu is cleaner if code working on fields
of this struct is taken out of deactivate_slab().
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
---
mm/slub.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c 2012-01-13 08:47:28.506748438 -0600
+++ linux-2.6/mm/slub.c 2012-01-13 08:47:31.930748367 -0600
@@ -1712,14 +1712,12 @@ void init_kmem_cache_cpus(struct kmem_ca
/*
* Remove the cpu slab
*/
-static void deactivate_slab(struct kmem_cache *s, struct kmem_cache_cpu *c)
+static void deactivate_slab(struct kmem_cache *s, struct page *page, void *freelist)
{
enum slab_modes { M_NONE, M_PARTIAL, M_FULL, M_FREE };
- struct page *page = c->page;
struct kmem_cache_node *n = get_node(s, page_to_nid(page));
int lock = 0;
enum slab_modes l = M_NONE, m = M_NONE;
- void *freelist;
void *nextfree;
int tail = DEACTIVATE_TO_HEAD;
struct page new;
@@ -1730,11 +1728,6 @@ static void deactivate_slab(struct kmem_
tail = DEACTIVATE_TO_TAIL;
}
- c->tid = next_tid(c->tid);
- c->page = NULL;
- freelist = c->freelist;
- c->freelist = NULL;
-
/*
* Stage one: Free all available per cpu objects back
* to the page freelist while it is still frozen. Leave the
@@ -1992,7 +1985,11 @@ int put_cpu_partial(struct kmem_cache *s
static inline void flush_slab(struct kmem_cache *s, struct kmem_cache_cpu *c)
{
stat(s, CPUSLAB_FLUSH);
- deactivate_slab(s, c);
+ deactivate_slab(s, c->page, c->freelist);
+
+ c->tid = next_tid(c->tid);
+ c->page = NULL;
+ c->freelist = NULL;
}
/*
@@ -2204,7 +2201,9 @@ redo:
if (unlikely(!node_match(c, node))) {
stat(s, ALLOC_NODE_MISMATCH);
- deactivate_slab(s, c);
+ deactivate_slab(s, c->page, c->freelist);
+ c->page = NULL;
+ c->freelist = NULL;
goto new_slab;
}
@@ -2264,8 +2263,9 @@ new_slab:
if (!alloc_debug_processing(s, c->page, freelist, addr))
goto new_slab; /* Slab failed checks. Next slab needed */
- c->freelist = get_freepointer(s, freelist);
- deactivate_slab(s, c);
+ deactivate_slab(s, c->page, get_freepointer(s, freelist));
+ c->page = NULL;
+ c->freelist = NULL;
local_irq_restore(flags);
return freelist;
}
--
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next prev parent reply other threads:[~2012-01-23 20:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-23 20:16 [Slub cleanup 0/9] Slub: cleanups V1 Christoph Lameter
2012-01-23 20:16 ` [Slub cleanup 1/9] slub: Use freelist instead of "object" in __slab_alloc Christoph Lameter
2012-02-01 21:51 ` David Rientjes
2012-01-23 20:16 ` [Slub cleanup 2/9] slub: Add frozen check " Christoph Lameter
2012-02-01 21:54 ` David Rientjes
2012-01-23 20:16 ` [Slub cleanup 3/9] slub: Acquire_slab() avoid loop Christoph Lameter
2012-01-23 20:16 ` [Slub cleanup 4/9] slub: Simplify control flow in __slab_alloc() Christoph Lameter
2012-02-01 22:02 ` David Rientjes
2012-01-23 20:16 ` [Slub cleanup 6/9] slub: Get rid of the node field Christoph Lameter
2012-02-01 22:11 ` David Rientjes
2012-01-23 20:16 ` Christoph Lameter [this message]
2012-01-23 20:16 ` [Slub cleanup 8/9] slub: Use page variable instead of c->page Christoph Lameter
2012-01-23 20:16 ` [Slub cleanup 9/9] slub: pass page to node_match() instead of kmem_cache_cpu structure Christoph Lameter
[not found] ` <20120123201708.312262597@linux.com>
2012-02-01 22:05 ` [Slub cleanup 5/9] slub: new_slab_objects() can also get objects from partial list David Rientjes
-- strict thread matches above, loose matches on Subject: below --
2012-05-09 15:09 [Slub cleanup 0/9] Slub: cleanups V2 cl, Christoph Lameter
2012-05-09 15:09 ` [Slub cleanup 7/9] slub: Separate out kmem_cache_cpu processing from deactivate_slab cl, Christoph Lameter
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