From 8758280fcc6129be89503efe93bb59eaf2f85d28 Mon Sep 17 00:00:00 2001 From: Nathan Scott Date: Tue, 14 Mar 2006 13:18:19 +1100 Subject: [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 --- fs/xfs/linux-2.6/kmem.h | 91 ++++++++++++++++++++++++++++++------------------- 1 file changed, 55 insertions(+), 36 deletions(-) (limited to 'fs/xfs/linux-2.6/kmem.h') diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h index c64a29cdfff..f0268a84e6f 100644 --- a/fs/xfs/linux-2.6/kmem.h +++ b/fs/xfs/linux-2.6/kmem.h @@ -23,17 +23,8 @@ #include /* - * 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); -- cgit v1.2.3