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6a585c61de
it should be dropped to one page but in the short term we should be able to easily live with 4 page allocations. Fix the nvlist bug, it turns out the user space side of things were packing the nvlists correctly as little endian, and the kernel space side of things due to a missing #define were unpacking them as big endian. git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@62 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
230 lines
9.1 KiB
C
230 lines
9.1 KiB
C
#ifndef _SPL_KMEM_H
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#define _SPL_KMEM_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define DEBUG_KMEM
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#undef DEBUG_KMEM_UNIMPLEMENTED
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/mm.h>
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#include <linux/spinlock.h>
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/*
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* Memory allocation interfaces
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*/
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#define KM_SLEEP GFP_KERNEL
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#define KM_NOSLEEP GFP_ATOMIC
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#undef KM_PANIC /* No linux analog */
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#define KM_PUSHPAGE (GFP_KERNEL | GFP_HIGH)
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#define KM_VMFLAGS GFP_LEVEL_MASK
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#define KM_FLAGS __GFP_BITS_MASK
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#ifdef DEBUG_KMEM
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extern atomic64_t kmem_alloc_used;
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extern unsigned long kmem_alloc_max;
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extern atomic64_t vmem_alloc_used;
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extern unsigned long vmem_alloc_max;
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extern int kmem_warning_flag;
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#define __kmem_alloc(size, flags, allocator) \
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({ void *_ptr_; \
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\
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/* Marked unlikely because we should never be doing this */ \
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if (unlikely((size) > (PAGE_SIZE * 4)) && kmem_warning_flag) \
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printk("spl: Warning kmem_alloc(%d, 0x%x) large alloc at %s:%d "\
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"(%ld/%ld)\n", (int)(size), (int)(flags), \
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__FILE__, __LINE__, \
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atomic64_read(&kmem_alloc_used), kmem_alloc_max); \
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\
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_ptr_ = (void *)allocator((size), (flags)); \
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if (_ptr_ == NULL) { \
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printk("spl: Warning kmem_alloc(%d, 0x%x) failed at %s:%d " \
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"(%ld/%ld)\n", (int)(size), (int)(flags), \
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__FILE__, __LINE__, \
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atomic64_read(&kmem_alloc_used), kmem_alloc_max); \
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} else { \
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atomic64_add((size), &kmem_alloc_used); \
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if (unlikely(atomic64_read(&kmem_alloc_used)>kmem_alloc_max)) \
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kmem_alloc_max = atomic64_read(&kmem_alloc_used); \
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} \
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\
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_ptr_; \
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})
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#define kmem_alloc(size, flags) __kmem_alloc((size), (flags), kmalloc)
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#define kmem_zalloc(size, flags) __kmem_alloc((size), (flags), kzalloc)
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#define kmem_free(ptr, size) \
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({ \
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BUG_ON(!(ptr) || (size) < 0); \
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atomic64_sub((size), &kmem_alloc_used); \
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memset(ptr, 0x5a, (size)); /* Poison */ \
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kfree(ptr); \
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})
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#define __vmem_alloc(size, flags) \
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({ void *_ptr_; \
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\
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BUG_ON(!(flags & KM_SLEEP)); \
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\
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_ptr_ = (void *)__vmalloc((size), ((flags) | \
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__GFP_HIGHMEM), PAGE_KERNEL); \
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if (_ptr_ == NULL) { \
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printk("spl: Warning vmem_alloc(%d, 0x%x) failed at %s:%d " \
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"(%ld/%ld)\n", (int)(size), (int)(flags), \
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__FILE__, __LINE__, \
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atomic64_read(&vmem_alloc_used), vmem_alloc_max); \
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} else { \
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atomic64_add((size), &vmem_alloc_used); \
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if (unlikely(atomic64_read(&vmem_alloc_used)>vmem_alloc_max)) \
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vmem_alloc_max = atomic64_read(&vmem_alloc_used); \
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} \
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\
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_ptr_; \
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})
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#define vmem_alloc(size, flags) __vmem_alloc((size), (flags))
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#define vmem_zalloc(size, flags) __vmem_alloc((size), ((flags) | \
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__GFP_ZERO))
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#define vmem_free(ptr, size) \
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({ \
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BUG_ON(!(ptr) || (size) < 0); \
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atomic64_sub((size), &vmem_alloc_used); \
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memset(ptr, 0x5a, (size)); /* Poison */ \
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vfree(ptr); \
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})
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#else
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#define kmem_alloc(size, flags) kmalloc((size), (flags))
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#define kmem_zalloc(size, flags) kzalloc((size), (flags))
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#define kmem_free(ptr, size) \
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({ \
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BUG_ON(!(ptr) || (size) < 0); \
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kfree(ptr); \
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})
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#define vmem_alloc(size, flags) __vmalloc((size), ((flags) | \
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__GFP_HIGHMEM), PAGE_KERNEL)
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#define vmem_zalloc(size, flags) __vmalloc((size), ((flags) | \
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__GFP_HIGHMEM | __GFP_ZERO) \
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PAGE_KERNEL)
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#define vmem_free(ptr, size) \
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({ \
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BUG_ON(!(ptr) || (size) < 0); \
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vfree(ptr); \
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})
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#endif /* DEBUG_KMEM */
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#ifdef DEBUG_KMEM_UNIMPLEMENTED
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static __inline__ void *
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kmem_alloc_tryhard(size_t size, size_t *alloc_size, int kmflags)
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{
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#error "kmem_alloc_tryhard() not implemented"
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}
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#endif /* DEBUG_KMEM_UNIMPLEMENTED */
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/*
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* Slab allocation interfaces
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*/
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#undef KMC_NOTOUCH /* No linux analog */
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#define KMC_NODEBUG 0x00000000 /* Default behavior */
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#define KMC_NOMAGAZINE /* No linux analog */
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#define KMC_NOHASH /* No linux analog */
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#define KMC_QCACHE /* No linux analog */
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#define KMC_REAP_CHUNK 256
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#define KMC_DEFAULT_SEEKS DEFAULT_SEEKS
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/* Defined by linux slab.h
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* typedef struct kmem_cache_s kmem_cache_t;
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*/
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/* No linux analog
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* extern int kmem_ready;
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* extern pgcnt_t kmem_reapahead;
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*/
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#ifdef DEBUG_KMEM_UNIMPLEMENTED
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static __inline__ void kmem_init(void) {
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#error "kmem_init() not implemented"
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}
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static __inline__ void kmem_thread_init(void) {
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#error "kmem_thread_init() not implemented"
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}
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static __inline__ void kmem_mp_init(void) {
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#error "kmem_mp_init() not implemented"
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}
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static __inline__ void kmem_reap_idspace(void) {
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#error "kmem_reap_idspace() not implemented"
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}
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static __inline__ size_t kmem_avail(void) {
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#error "kmem_avail() not implemented"
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}
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static __inline__ size_t kmem_maxavail(void) {
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#error "kmem_maxavail() not implemented"
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}
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static __inline__ uint64_t kmem_cache_stat(kmem_cache_t *cache) {
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#error "kmem_cache_stat() not implemented"
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}
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#endif /* DEBUG_KMEM_UNIMPLEMENTED */
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/* XXX - Used by arc.c to adjust its memory footprint. We may want
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* to use this hook in the future to adjust behavior based on
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* debug levels. For now it's safe to always return 0.
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*/
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static __inline__ int
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kmem_debugging(void)
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{
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return 0;
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}
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typedef int (*kmem_constructor_t)(void *, void *, int);
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typedef void (*kmem_destructor_t)(void *, void *);
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typedef void (*kmem_reclaim_t)(void *);
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extern int kmem_set_warning(int flag);
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extern kmem_cache_t *
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__kmem_cache_create(char *name, size_t size, size_t align,
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kmem_constructor_t constructor,
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kmem_destructor_t destructor,
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kmem_reclaim_t reclaim,
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void *priv, void *vmp, int flags);
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int
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extern __kmem_cache_destroy(kmem_cache_t *cache);
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void
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extern __kmem_reap(void);
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int kmem_init(void);
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void kmem_fini(void);
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#define kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags) \
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__kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags)
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#define kmem_cache_destroy(cache) __kmem_cache_destroy(cache)
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#define kmem_cache_alloc(cache, flags) kmem_cache_alloc(cache, flags)
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#define kmem_cache_free(cache, ptr) kmem_cache_free(cache, ptr)
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#define kmem_cache_reap_now(cache) kmem_cache_shrink(cache)
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#define kmem_reap() __kmem_reap()
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SPL_KMEM_H */
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