From: Christoph Lameter <cl@linux.com>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: David Rientjes <rientjes@google.com>,
Andi Kleen <andi@firstfloor.org>,
tj@kernel.org, Metathronius Galabant <m.galabant@googlemail.com>,
Matt Mackall <mpm@selenic.com>,
Eric Dumazet <eric.dumazet@gmail.com>,
Adrian Drzewiecki <z@drze.net>,
linux-mm@kvack.org
Subject: [slub rfc1 08/12] slub: enable use of deactivate_slab with interrupts on
Date: Fri, 02 Sep 2011 15:47:05 -0500 [thread overview]
Message-ID: <20110902204743.792073929@linux.com> (raw)
In-Reply-To: 20110902204657.105194589@linux.com
[-- Attachment #1: allocate_slab_with_irq_enabled --]
[-- Type: text/plain, Size: 1970 bytes --]
Locking needs to change a bit.
Signed-off-by: Christoph Lameter <cl@linux.com>
---
mm/slub.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c 2011-09-02 08:21:28.931219055 -0500
+++ linux-2.6/mm/slub.c 2011-09-02 08:22:38.141218609 -0500
@@ -1781,6 +1781,7 @@ static void deactivate_slab(struct kmem_
int tail = 0;
struct page new;
struct page old;
+ unsigned long uninitialized_var(flags);
if (page->freelist) {
stat(s, DEACTIVATE_REMOTE_FREES);
@@ -1807,7 +1808,7 @@ static void deactivate_slab(struct kmem_
new.inuse--;
VM_BUG_ON(!new.frozen);
- } while (!__cmpxchg_double_slab(s, page,
+ } while (!cmpxchg_double_slab(s, page,
prior, counters,
freelist, new.counters,
"drain percpu freelist"));
@@ -1857,7 +1858,7 @@ redo:
* that acquire_slab() will see a slab page that
* is frozen
*/
- spin_lock(&n->list_lock);
+ spin_lock_irqsave(&n->list_lock, flags);
}
} else {
m = M_FULL;
@@ -1868,7 +1869,7 @@ redo:
* slabs from diagnostic functions will not see
* any frozen slabs.
*/
- spin_lock(&n->list_lock);
+ spin_lock_irqsave(&n->list_lock, flags);
}
}
@@ -1896,14 +1897,14 @@ redo:
}
l = m;
- if (!__cmpxchg_double_slab(s, page,
+ if (!cmpxchg_double_slab(s, page,
old.freelist, old.counters,
new.freelist, new.counters,
"unfreezing slab"))
goto redo;
if (lock)
- spin_unlock(&n->list_lock);
+ spin_unlock_irqrestore(&n->list_lock, flags);
if (m == M_FREE) {
stat(s, DEACTIVATE_EMPTY);
--
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next prev parent reply other threads:[~2011-09-02 20:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-02 20:46 [slub rfc1 00/12] slub: RFC lockless allocation paths V1 Christoph Lameter
2011-09-02 20:46 ` [slub rfc1 01/12] slub: free slabs without holding locks (V2) Christoph Lameter
2011-09-02 20:46 ` [slub rfc1 02/12] slub: Remove useless statements in __slab_alloc Christoph Lameter
2011-09-02 20:47 ` [slub rfc1 03/12] slub: Get rid of the node field Christoph Lameter
2011-09-02 20:47 ` [slub rfc1 04/12] slub: Separate out kmem_cache_cpu processing from deactivate_slab Christoph Lameter
2011-09-02 20:47 ` [slub rfc1 05/12] slub: Extract get_freelist from __slab_alloc Christoph Lameter
2011-09-02 20:47 ` [slub rfc1 06/12] slub: Use freelist instead of "object" in __slab_alloc Christoph Lameter
2011-09-02 20:47 ` [slub rfc1 07/12] slub: pass page to node_match() instead of kmem_cache_cpu structure Christoph Lameter
2011-09-02 20:47 ` Christoph Lameter [this message]
2011-09-02 20:47 ` [slub rfc1 09/12] slub: Run deactivate_slab with interrupts enabled Christoph Lameter
2011-09-02 20:47 ` [slub rfc1 10/12] slub: Enable use of get_partial " Christoph Lameter
2011-09-02 20:47 ` [slub rfc1 11/12] slub: Remove kmem_cache_cpu dependency from acquire slab Christoph Lameter
2011-09-02 20:47 ` [slub rfc1 12/12] slub: Drop page field from kmem_cache_cpu Christoph Lameter
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