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authorNathan Scott <nathans@sgi.com>2006-03-14 13:18:19 +1100
committerNathan Scott <nathans@sgi.com>2006-03-14 13:18:19 +1100
commit8758280fcc6129be89503efe93bb59eaf2f85d28 (patch)
tree395246120b571385c1f3efad773b83a932d008da /fs/xfs/linux-2.6/kmem.h
parent8d280b98cfe3c0b69c37d355218975c1c0279bb0 (diff)
[XFS] Cleanup the use of zones/slabs, more consistent and allows flags to
be passed. SGI-PV: 949073 SGI-Modid: xfs-linux-melb:xfs-kern:25122a Signed-off-by: Nathan Scott <nathans@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6/kmem.h')
-rw-r--r--fs/xfs/linux-2.6/kmem.h91
1 files changed, 55 insertions, 36 deletions
diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
index c64a29cdfff3..f0268a84e6fd 100644
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -23,17 +23,8 @@
#include <linux/mm.h>
/*
- * memory management routines
+ * Process flags handling
*/
-#define KM_SLEEP 0x0001u
-#define KM_NOSLEEP 0x0002u
-#define KM_NOFS 0x0004u
-#define KM_MAYFAIL 0x0008u
-
-#define kmem_zone kmem_cache
-#define kmem_zone_t struct kmem_cache
-
-typedef unsigned long xfs_pflags_t;
#define PFLAGS_TEST_NOIO() (current->flags & PF_NOIO)
#define PFLAGS_TEST_FSTRANS() (current->flags & PF_FSTRANS)
@@ -67,74 +58,102 @@ typedef unsigned long xfs_pflags_t;
*(NSTATEP) = *(OSTATEP); \
} while (0)
-static __inline gfp_t kmem_flags_convert(unsigned int __nocast flags)
+/*
+ * General memory allocation interfaces
+ */
+
+#define KM_SLEEP 0x0001u
+#define KM_NOSLEEP 0x0002u
+#define KM_NOFS 0x0004u
+#define KM_MAYFAIL 0x0008u
+
+/*
+ * We use a special process flag to avoid recursive callbacks into
+ * the filesystem during transactions. We will also issue our own
+ * warnings, so we explicitly skip any generic ones (silly of us).
+ */
+static inline gfp_t
+kmem_flags_convert(unsigned int __nocast flags)
{
- gfp_t lflags = __GFP_NOWARN; /* we'll report problems, if need be */
+ gfp_t lflags;
-#ifdef DEBUG
- if (unlikely(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL))) {
- printk(KERN_WARNING
- "XFS: memory allocation with wrong flags (%x)\n", flags);
- BUG();
- }
-#endif
+ BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL));
if (flags & KM_NOSLEEP) {
- lflags |= GFP_ATOMIC;
+ lflags = GFP_ATOMIC | __GFP_NOWARN;
} else {
- lflags |= GFP_KERNEL;
-
- /* avoid recusive callbacks to filesystem during transactions */
+ lflags = GFP_KERNEL | __GFP_NOWARN;
if (PFLAGS_TEST_FSTRANS() || (flags & KM_NOFS))
lflags &= ~__GFP_FS;
}
-
- return lflags;
+ return lflags;
}
-static __inline kmem_zone_t *
+extern void *kmem_alloc(size_t, unsigned int __nocast);
+extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast);
+extern void *kmem_zalloc(size_t, unsigned int __nocast);
+extern void kmem_free(void *, size_t);
+
+/*
+ * Zone interfaces
+ */
+
+#define KM_ZONE_HWALIGN SLAB_HWCACHE_ALIGN
+#define KM_ZONE_RECLAIM SLAB_RECLAIM_ACCOUNT
+#define KM_ZONE_SPREAD 0
+
+#define kmem_zone kmem_cache
+#define kmem_zone_t struct kmem_cache
+
+static inline kmem_zone_t *
kmem_zone_init(int size, char *zone_name)
{
return kmem_cache_create(zone_name, size, 0, 0, NULL, NULL);
}
-static __inline void
+static inline kmem_zone_t *
+kmem_zone_init_flags(int size, char *zone_name, unsigned long flags,
+ void (*construct)(void *, kmem_zone_t *, unsigned long))
+{
+ return kmem_cache_create(zone_name, size, 0, flags, construct, NULL);
+}
+
+static inline void
kmem_zone_free(kmem_zone_t *zone, void *ptr)
{
kmem_cache_free(zone, ptr);
}
-static __inline void
+static inline void
kmem_zone_destroy(kmem_zone_t *zone)
{
if (zone && kmem_cache_destroy(zone))
BUG();
}
-extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast);
extern void *kmem_zone_alloc(kmem_zone_t *, unsigned int __nocast);
+extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast);
-extern void *kmem_alloc(size_t, unsigned int __nocast);
-extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast);
-extern void *kmem_zalloc(size_t, unsigned int __nocast);
-extern void kmem_free(void *, size_t);
+/*
+ * Low memory cache shrinkers
+ */
typedef struct shrinker *kmem_shaker_t;
typedef int (*kmem_shake_func_t)(int, gfp_t);
-static __inline kmem_shaker_t
+static inline kmem_shaker_t
kmem_shake_register(kmem_shake_func_t sfunc)
{
return set_shrinker(DEFAULT_SEEKS, sfunc);
}
-static __inline void
+static inline void
kmem_shake_deregister(kmem_shaker_t shrinker)
{
remove_shrinker(shrinker);
}
-static __inline int
+static inline int
kmem_shake_allow(gfp_t gfp_mask)
{
return (gfp_mask & __GFP_WAIT);