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Message-ID: <Pine.LNX.4.64.0805090002250.28488@sbz-30.cs.Helsinki.FI>
Date: Fri, 9 May 2008 00:03:11 +0300 (EEST)
From: Pekka J Enberg <penberg@...helsinki.fi>
To: mingo@...e.hu
cc: clameter@....com, akpm@...ux-foundation.org,
vegard.nossum@...il.com, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] slab: move struct kmem_cache to headers
From: Pekka Enberg <penberg@...helsinki.fi>
Move the SLAB struct kmem_cache definition to <linux/slab_def.h> like with SLUB
so kmemcheck can access ->ctor and ->flags.
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Christoph Lameter <clameter@....com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Vegard Nossum <vegard.nossum@...il.com>
Signed-off-by: Pekka Enberg <penberg@...helsinki.fi>
---
include/linux/slab_def.h | 81 +++++++++++++++++++++++++++++++++++++++++++++++
mm/slab.c | 81 -----------------------------------------------
2 files changed, 81 insertions(+), 81 deletions(-)
Index: kmemcheck/include/linux/slab_def.h
===================================================================
--- kmemcheck.orig/include/linux/slab_def.h 2008-05-08 23:49:15.000000000 +0300
+++ kmemcheck/include/linux/slab_def.h 2008-05-08 23:50:45.000000000 +0300
@@ -15,6 +15,87 @@
#include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */
#include <linux/compiler.h>
+/*
+ * struct kmem_cache
+ *
+ * manages a cache.
+ */
+
+struct kmem_cache {
+/* 1) per-cpu data, touched during every alloc/free */
+ struct array_cache *array[NR_CPUS];
+/* 2) Cache tunables. Protected by cache_chain_mutex */
+ unsigned int batchcount;
+ unsigned int limit;
+ unsigned int shared;
+
+ unsigned int buffer_size;
+ u32 reciprocal_buffer_size;
+/* 3) touched by every alloc & free from the backend */
+
+ unsigned int flags; /* constant flags */
+ unsigned int num; /* # of objs per slab */
+
+/* 4) cache_grow/shrink */
+ /* order of pgs per slab (2^n) */
+ unsigned int gfporder;
+
+ /* force GFP flags, e.g. GFP_DMA */
+ gfp_t gfpflags;
+
+ size_t colour; /* cache colouring range */
+ unsigned int colour_off; /* colour offset */
+ struct kmem_cache *slabp_cache;
+ unsigned int slab_size;
+ unsigned int dflags; /* dynamic flags */
+
+ /* constructor func */
+ void (*ctor)(struct kmem_cache *, void *);
+
+/* 5) cache creation/removal */
+ const char *name;
+ struct list_head next;
+
+/* 6) statistics */
+#ifdef CONFIG_DEBUG_SLAB
+ unsigned long num_active;
+ unsigned long num_allocations;
+ unsigned long high_mark;
+ unsigned long grown;
+ unsigned long reaped;
+ unsigned long errors;
+ unsigned long max_freeable;
+ unsigned long node_allocs;
+ unsigned long node_frees;
+ unsigned long node_overflow;
+ atomic_t allochit;
+ atomic_t allocmiss;
+ atomic_t freehit;
+ atomic_t freemiss;
+
+ /*
+ * If debugging is enabled, then the allocator can add additional
+ * fields and/or padding to every object. buffer_size contains the total
+ * object size including these internal fields, the following two
+ * variables contain the offset to the user object and its size.
+ */
+ int obj_offset;
+ int obj_size;
+#endif /* CONFIG_DEBUG_SLAB */
+
+ /*
+ * We put nodelists[] at the end of kmem_cache, because we want to size
+ * this array to nr_node_ids slots instead of MAX_NUMNODES
+ * (see kmem_cache_init())
+ * We still use [MAX_NUMNODES] and not [1] or [0] because cache_cache
+ * is statically defined, so we reserve the max number of nodes.
+ */
+ struct kmem_list3 *nodelists[MAX_NUMNODES];
+ /*
+ * Do not add fields after nodelists[]
+ */
+};
+
/* Size description struct for general caches. */
struct cache_sizes {
size_t cs_size;
Index: kmemcheck/mm/slab.c
===================================================================
--- kmemcheck.orig/mm/slab.c 2008-05-08 23:49:15.000000000 +0300
+++ kmemcheck/mm/slab.c 2008-05-08 23:50:45.000000000 +0300
@@ -371,87 +371,6 @@
MAKE_LIST((cachep), (&(ptr)->slabs_free), slabs_free, nodeid); \
} while (0)
-/*
- * struct kmem_cache
- *
- * manages a cache.
- */
-
-struct kmem_cache {
-/* 1) per-cpu data, touched during every alloc/free */
- struct array_cache *array[NR_CPUS];
-/* 2) Cache tunables. Protected by cache_chain_mutex */
- unsigned int batchcount;
- unsigned int limit;
- unsigned int shared;
-
- unsigned int buffer_size;
- u32 reciprocal_buffer_size;
-/* 3) touched by every alloc & free from the backend */
-
- unsigned int flags; /* constant flags */
- unsigned int num; /* # of objs per slab */
-
-/* 4) cache_grow/shrink */
- /* order of pgs per slab (2^n) */
- unsigned int gfporder;
-
- /* force GFP flags, e.g. GFP_DMA */
- gfp_t gfpflags;
-
- size_t colour; /* cache colouring range */
- unsigned int colour_off; /* colour offset */
- struct kmem_cache *slabp_cache;
- unsigned int slab_size;
- unsigned int dflags; /* dynamic flags */
-
- /* constructor func */
- void (*ctor)(struct kmem_cache *, void *);
-
-/* 5) cache creation/removal */
- const char *name;
- struct list_head next;
-
-/* 6) statistics */
-#if STATS
- unsigned long num_active;
- unsigned long num_allocations;
- unsigned long high_mark;
- unsigned long grown;
- unsigned long reaped;
- unsigned long errors;
- unsigned long max_freeable;
- unsigned long node_allocs;
- unsigned long node_frees;
- unsigned long node_overflow;
- atomic_t allochit;
- atomic_t allocmiss;
- atomic_t freehit;
- atomic_t freemiss;
-#endif
-#if DEBUG
- /*
- * If debugging is enabled, then the allocator can add additional
- * fields and/or padding to every object. buffer_size contains the total
- * object size including these internal fields, the following two
- * variables contain the offset to the user object and its size.
- */
- int obj_offset;
- int obj_size;
-#endif
- /*
- * We put nodelists[] at the end of kmem_cache, because we want to size
- * this array to nr_node_ids slots instead of MAX_NUMNODES
- * (see kmem_cache_init())
- * We still use [MAX_NUMNODES] and not [1] or [0] because cache_cache
- * is statically defined, so we reserve the max number of nodes.
- */
- struct kmem_list3 *nodelists[MAX_NUMNODES];
- /*
- * Do not add fields after nodelists[]
- */
-};
-
#define CFLGS_OFF_SLAB (0x80000000UL)
#define OFF_SLAB(x) ((x)->flags & CFLGS_OFF_SLAB)
--
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