c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2025-03-27 22:16:21 +03:00
Code Issues Packages Projects Releases Wiki Activity
b2585b36d3
mirror_zfs/include/sys/kmem.h
behlendo cc7449ccd6 - Properly fix the debug support for all the ASSERT's, VERIFIES, etc can be 
compiled out when doing performance runs.
- Bite the bullet and fully autoconfize the debug options in the configure
  time parameters.  By default all the debug support is disable in the core
  SPL build, but available to modules which enable it when building against
  the SPL.  To enable particular SPL debug support use the follow configure
  options:

  --enable-debug		Internal ASSERTs
  --enable-debug-kmem		Detailed memory accounting
  --enable-debug-mutex		Detailed mutex tracking
  --enable-debug_kstat          Kstat info exported to /proc
  --enable-debug-callb		Additional callb debug



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@111 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
2008-05-19 02:49:12 +00:00

375 lines
18 KiB
C
Raw Blame History

#ifndef _SPL_KMEM_H
#define _SPL_KMEM_H
#ifdef __cplusplus
extern "C" {
#endif
#undef DEBUG_KMEM_UNIMPLEMENTED
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <linux/rwsem.h>
#include <linux/hash.h>
#include <linux/ctype.h>
#include <sys/debug.h>
/*
* Memory allocation interfaces
*/
#define KM_SLEEP GFP_KERNEL
#define KM_NOSLEEP GFP_ATOMIC
#undef KM_PANIC /* No linux analog */
#define KM_PUSHPAGE (GFP_KERNEL | __GFP_HIGH)
#define KM_VMFLAGS GFP_LEVEL_MASK
#define KM_FLAGS __GFP_BITS_MASK
#ifdef DEBUG_KMEM
extern atomic64_t kmem_alloc_used;
extern unsigned long kmem_alloc_max;
extern atomic64_t vmem_alloc_used;
extern unsigned long vmem_alloc_max;
extern int kmem_warning_flag;
extern atomic64_t kmem_cache_alloc_failed;
/* XXX - Not to surprisingly with debugging enabled the xmem_locks are very
* highly contended particularly on xfree(). If we want to run with this
* detailed debugging enabled for anything other than debugging we need to
* minimize the contention by moving to a lock per xmem_table entry model.
*/
#define KMEM_HASH_BITS 10
#define KMEM_TABLE_SIZE (1 << KMEM_HASH_BITS)
extern struct hlist_head kmem_table[KMEM_TABLE_SIZE];
extern struct list_head kmem_list;
extern spinlock_t kmem_lock;
#define VMEM_HASH_BITS 10
#define VMEM_TABLE_SIZE (1 << VMEM_HASH_BITS)
extern struct hlist_head vmem_table[VMEM_TABLE_SIZE];
extern struct list_head vmem_list;
extern spinlock_t vmem_lock;
typedef struct kmem_debug {
struct hlist_node kd_hlist; /* Hash node linkage */
struct list_head kd_list; /* List of all allocations */
void *kd_addr; /* Allocation pointer */
size_t kd_size; /* Allocation size */
const char *kd_func; /* Allocation function */
int kd_line; /* Allocation line */
} kmem_debug_t;
static __inline__ kmem_debug_t *
__kmem_del_init(spinlock_t *lock,struct hlist_head *table,int bits,void *addr)
{
struct hlist_head *head;
struct hlist_node *node;
struct kmem_debug *p;
unsigned long flags;
spin_lock_irqsave(lock, flags);
head = &table[hash_ptr(addr, bits)];
hlist_for_each_entry_rcu(p, node, head, kd_hlist) {
if (p->kd_addr == addr) {
hlist_del_init(&p->kd_hlist);
list_del_init(&p->kd_list);
spin_unlock_irqrestore(lock, flags);
return p;
}
}
spin_unlock_irqrestore(lock, flags);
return NULL;
}
#define __kmem_alloc(size, flags, allocator) \
({ void *_ptr_ = NULL; \
kmem_debug_t *_dptr_; \
unsigned long _flags_; \
\
_dptr_ = (kmem_debug_t *)kmalloc(sizeof(kmem_debug_t), (flags)); \
if (_dptr_ == NULL) { \
__CDEBUG_LIMIT(S_KMEM, D_WARNING, "Warning " \
"kmem_alloc(%d, 0x%x) debug failed\n", \
sizeof(kmem_debug_t), (int)(flags)); \
} else { \
/* Marked unlikely because we should never be doing this, */ \
/* we tolerate to up 2 pages but a single page is best. */ \
if (unlikely((size) > (PAGE_SIZE * 2)) && kmem_warning_flag) \
__CDEBUG_LIMIT(S_KMEM, D_WARNING, "Warning large " \
"kmem_alloc(%d, 0x%x) (%ld/%ld)\n", \
(int)(size), (int)(flags), \
atomic64_read(&kmem_alloc_used), \
kmem_alloc_max); \
\
_ptr_ = (void *)allocator((size), (flags)); \
if (_ptr_ == NULL) { \
kfree(_dptr_); \
__CDEBUG_LIMIT(S_KMEM, D_WARNING, "Warning " \
"kmem_alloc(%d, 0x%x) failed (%ld/" \
"%ld)\n", (int)(size), (int)(flags), \
atomic64_read(&kmem_alloc_used), \
kmem_alloc_max); \
} else { \
atomic64_add((size), &kmem_alloc_used); \
if (unlikely(atomic64_read(&kmem_alloc_used) > \
kmem_alloc_max)) \
kmem_alloc_max = \
atomic64_read(&kmem_alloc_used); \
\
INIT_HLIST_NODE(&_dptr_->kd_hlist); \
INIT_LIST_HEAD(&_dptr_->kd_list); \
_dptr_->kd_addr = _ptr_; \
_dptr_->kd_size = (size); \
_dptr_->kd_func = __FUNCTION__; \
_dptr_->kd_line = __LINE__; \
spin_lock_irqsave(&kmem_lock, _flags_); \
hlist_add_head_rcu(&_dptr_->kd_hlist, \
&kmem_table[hash_ptr(_ptr_, KMEM_HASH_BITS)]);\
list_add_tail(&_dptr_->kd_list, &kmem_list); \
spin_unlock_irqrestore(&kmem_lock, _flags_); \
\
__CDEBUG_LIMIT(S_KMEM, D_INFO, "kmem_alloc(" \
"%d, 0x%x) = %p (%ld/%ld)\n", \
(int)(size), (int)(flags), _ptr_, \
atomic64_read(&kmem_alloc_used), \
kmem_alloc_max); \
} \
} \
\
_ptr_; \
})
#define kmem_alloc(size, flags) __kmem_alloc((size), (flags), kmalloc)
#define kmem_zalloc(size, flags) __kmem_alloc((size), (flags), kzalloc)
#define kmem_free(ptr, size) \
({ \
kmem_debug_t *_dptr_; \
ASSERT((ptr) || (size > 0)); \
\
_dptr_ = __kmem_del_init(&kmem_lock, kmem_table, KMEM_HASH_BITS, ptr);\
ASSERT(_dptr_); /* Must exist in hash due to kmem_alloc() */ \
ASSERTF(_dptr_->kd_size == (size), "kd_size (%d) != size (%d), " \
"kd_func = %s, kd_line = %d\n", _dptr_->kd_size, (size), \
_dptr_->kd_func, _dptr_->kd_line); /* Size must match */ \
atomic64_sub((size), &kmem_alloc_used); \
__CDEBUG_LIMIT(S_KMEM, D_INFO, "kmem_free(%p, %d) (%ld/%ld)\n", \
(ptr), (int)(size), atomic64_read(&kmem_alloc_used), \
kmem_alloc_max); \
\
memset(_dptr_, 0x5a, sizeof(kmem_debug_t)); \
kfree(_dptr_); \
\
memset(ptr, 0x5a, (size)); \
kfree(ptr); \
})
#define __vmem_alloc(size, flags) \
({ void *_ptr_ = NULL; \
kmem_debug_t *_dptr_; \
unsigned long _flags_; \
\
ASSERT((flags) & KM_SLEEP); \
\
_dptr_ = (kmem_debug_t *)kmalloc(sizeof(kmem_debug_t), (flags)); \
if (_dptr_ == NULL) { \
__CDEBUG_LIMIT(S_KMEM, D_WARNING, "Warning " \
"vmem_alloc(%d, 0x%x) debug failed\n", \
sizeof(kmem_debug_t), (int)(flags)); \
} else { \
_ptr_ = (void *)__vmalloc((size), (((flags) | \
__GFP_HIGHMEM) & ~__GFP_ZERO), \
PAGE_KERNEL); \
if (_ptr_ == NULL) { \
kfree(_dptr_); \
__CDEBUG_LIMIT(S_KMEM, D_WARNING, "Warning " \
"vmem_alloc(%d, 0x%x) failed (%ld/" \
"%ld)\n", (int)(size), (int)(flags), \
atomic64_read(&vmem_alloc_used), \
vmem_alloc_max); \
} else { \
if (flags & __GFP_ZERO) \
memset(_ptr_, 0, (size)); \
\
atomic64_add((size), &vmem_alloc_used); \
if (unlikely(atomic64_read(&vmem_alloc_used) > \
vmem_alloc_max)) \
vmem_alloc_max = \
atomic64_read(&vmem_alloc_used); \
\
INIT_HLIST_NODE(&_dptr_->kd_hlist); \
INIT_LIST_HEAD(&_dptr_->kd_list); \
_dptr_->kd_addr = _ptr_; \
_dptr_->kd_size = (size); \
_dptr_->kd_func = __FUNCTION__; \
_dptr_->kd_line = __LINE__; \
spin_lock_irqsave(&vmem_lock, _flags_); \
hlist_add_head_rcu(&_dptr_->kd_hlist, \
&vmem_table[hash_ptr(_ptr_, VMEM_HASH_BITS)]);\
list_add_tail(&_dptr_->kd_list, &vmem_list); \
spin_unlock_irqrestore(&vmem_lock, _flags_); \
\
__CDEBUG_LIMIT(S_KMEM, D_INFO, "vmem_alloc(" \
"%d, 0x%x) = %p (%ld/%ld)\n", \
(int)(size), (int)(flags), _ptr_, \
atomic64_read(&vmem_alloc_used), \
vmem_alloc_max); \
} \
} \
\
_ptr_; \
})
#define vmem_alloc(size, flags) __vmem_alloc((size), (flags))
#define vmem_zalloc(size, flags) __vmem_alloc((size), ((flags) | \
__GFP_ZERO))
#define vmem_free(ptr, size) \
({ \
kmem_debug_t *_dptr_; \
ASSERT((ptr) || (size > 0)); \
\
_dptr_ = __kmem_del_init(&vmem_lock, vmem_table, VMEM_HASH_BITS, ptr);\
ASSERT(_dptr_); /* Must exist in hash due to vmem_alloc() */ \
ASSERTF(_dptr_->kd_size == (size), "kd_size (%d) != size (%d), " \
"kd_func = %s, kd_line = %d\n", _dptr_->kd_size, (size), \
_dptr_->kd_func, _dptr_->kd_line); /* Size must match */ \
atomic64_sub((size), &vmem_alloc_used); \
__CDEBUG_LIMIT(S_KMEM, D_INFO, "vmem_free(%p, %d) (%ld/%ld)\n", \
(ptr), (int)(size), atomic64_read(&vmem_alloc_used), \
vmem_alloc_max); \
\
memset(_dptr_, 0x5a, sizeof(kmem_debug_t)); \
kfree(_dptr_); \
\
memset(ptr, 0x5a, (size)); \
vfree(ptr); \
})
#else /* DEBUG_KMEM */
#define kmem_alloc(size, flags) kmalloc((size), (flags))
#define kmem_zalloc(size, flags) kzalloc((size), (flags))
#define kmem_free(ptr, size) kfree(ptr)
#define vmem_alloc(size, flags) __vmalloc((size), ((flags) | \
__GFP_HIGHMEM), PAGE_KERNEL)
#define vmem_zalloc(size, flags) \
({ \
void *_ptr_ = __vmalloc((size),((flags)|__GFP_HIGHMEM),PAGE_KERNEL); \
if (_ptr_) \
memset(_ptr_, 0, (size)); \
_ptr_; \
})
#define vmem_free(ptr, size) vfree(ptr)
#endif /* DEBUG_KMEM */
#ifdef DEBUG_KMEM_UNIMPLEMENTED
static __inline__ void *
kmem_alloc_tryhard(size_t size, size_t *alloc_size, int kmflags)
{
#error "kmem_alloc_tryhard() not implemented"
}
#endif /* DEBUG_KMEM_UNIMPLEMENTED */
/*
* Slab allocation interfaces
*/
#undef KMC_NOTOUCH /* No linux analog */
#define KMC_NODEBUG 0x00000000 /* Default behavior */
#define KMC_NOMAGAZINE /* No linux analog */
#define KMC_NOHASH /* No linux analog */
#define KMC_QCACHE /* No linux analog */
#define KMC_REAP_CHUNK 256
#define KMC_DEFAULT_SEEKS DEFAULT_SEEKS
/* Defined by linux slab.h
* typedef struct kmem_cache_s kmem_cache_t;
*/
/* No linux analog
* extern int kmem_ready;
* extern pgcnt_t kmem_reapahead;
*/
#ifdef DEBUG_KMEM_UNIMPLEMENTED
static __inline__ void kmem_init(void) {
#error "kmem_init() not implemented"
}
static __inline__ void kmem_thread_init(void) {
#error "kmem_thread_init() not implemented"
}
static __inline__ void kmem_mp_init(void) {
#error "kmem_mp_init() not implemented"
}
static __inline__ void kmem_reap_idspace(void) {
#error "kmem_reap_idspace() not implemented"
}
static __inline__ size_t kmem_avail(void) {
#error "kmem_avail() not implemented"
}
static __inline__ size_t kmem_maxavail(void) {
#error "kmem_maxavail() not implemented"
}
static __inline__ uint64_t kmem_cache_stat(kmem_cache_t *cache) {
#error "kmem_cache_stat() not implemented"
}
#endif /* DEBUG_KMEM_UNIMPLEMENTED */
/* XXX - Used by arc.c to adjust its memory footprint. We may want
* to use this hook in the future to adjust behavior based on
* debug levels. For now it's safe to always return 0.
*/
static __inline__ int
kmem_debugging(void)
{
return 0;
}
typedef int (*kmem_constructor_t)(void *, void *, int);
typedef void (*kmem_destructor_t)(void *, void *);
typedef void (*kmem_reclaim_t)(void *);
extern int kmem_set_warning(int flag);
extern kmem_cache_t *
__kmem_cache_create(char *name, size_t size, size_t align,
kmem_constructor_t constructor,
kmem_destructor_t destructor,
kmem_reclaim_t reclaim,
void *priv, void *vmp, int flags);
extern int __kmem_cache_destroy(kmem_cache_t *cache);
extern void *__kmem_cache_alloc(kmem_cache_t *cache, gfp_t flags);
extern void __kmem_reap(void);
int kmem_init(void);
void kmem_fini(void);
#define kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags) \
__kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags)
#define kmem_cache_destroy(cache) __kmem_cache_destroy(cache)
#define kmem_cache_alloc(cache, flags) __kmem_cache_alloc(cache, flags)
#define kmem_cache_free(cache, ptr) kmem_cache_free(cache, ptr)
#define kmem_cache_reap_now(cache) kmem_cache_shrink(cache)
#define kmem_reap() __kmem_reap()
#ifdef __cplusplus
}
#endif
#endif /* _SPL_KMEM_H */
Reference in New Issue View Git Blame Copy Permalink