diff options
Diffstat (limited to 'include/sys/vmsystm.h')
| -rw-r--r-- | include/sys/vmsystm.h | 65 |
1 files changed, 62 insertions, 3 deletions
diff --git a/include/sys/vmsystm.h b/include/sys/vmsystm.h index 75ae8a991..7876fc72b 100644 --- a/include/sys/vmsystm.h +++ b/include/sys/vmsystm.h @@ -58,12 +58,71 @@ extern vmem_t *heap_arena; /* primary kernel heap arena */ extern vmem_t *zio_alloc_arena; /* arena for zio caches */ extern vmem_t *zio_arena; /* arena for allocating zio memory */ -#define VMEM_ALLOC 0x01 -#define VMEM_FREE 0x02 - extern pgcnt_t spl_kmem_availrmem(void); extern size_t vmem_size(vmem_t *vmp, int typemask); +/* + * The following symbols are available for use within the kernel + * itself, and they used to be available in older kernels. But it + * looks like they have been removed perhaps due to lack of use. + * For our purposes we need them to access the global memory state + * of the system, which is even available to user space process + * in /proc/meminfo. It's odd to me that there is no kernel API + * to get the same information, minimally the proc handler for + * the above mentioned /proc/meminfo file would make use of it. + */ + +/* Source linux/fs/proc/mmu.c */ +#ifndef HAVE_GET_VMALLOC_INFO +#ifdef CONFIG_MMU + +struct vmalloc_info { + unsigned long used; + unsigned long largest_chunk; +}; + +typedef void (*get_vmalloc_info_t)(struct vmalloc_info *); +extern get_vmalloc_info_t get_vmalloc_info_fn; + +# define VMEM_ALLOC 0x01 +# define VMEM_FREE 0x02 +# define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START) +# define get_vmalloc_info(vmi) get_vmalloc_info_fn(vmi) +#else +# error "CONFIG_MMU must be defined" +#endif /* CONFIG_MMU */ +#endif /* HAVE_GET_VMALLOC_INFO */ + +/* Source linux/mm/mmzone.c */ +#ifndef HAVE_FIRST_ONLINE_PGDAT +typedef struct pglist_data *(*first_online_pgdat_t)(void); +extern first_online_pgdat_t first_online_pgdat_fn; +#define first_online_pgdat() first_online_pgdat_fn() +#endif /* HAVE_FIRST_ONLINE_PGDAT */ + +/* Source linux/mm/mmzone.c */ +#ifndef HAVE_NEXT_ONLINE_PGDAT +typedef struct pglist_data *(*next_online_pgdat_t)(struct pglist_data *); +extern next_online_pgdat_t next_online_pgdat_fn; +#define next_online_pgdat(pgd) next_online_pgdat_fn(pgd) +#endif /* HAVE_NEXT_ONLINE_PGDAT */ + +/* Source linux/mm/mmzone.c */ +#ifndef HAVE_NEXT_ZONE +typedef struct zone *(*next_zone_t)(struct zone *); +extern next_zone_t next_zone_fn; +#define next_zone(zone) next_zone_fn(zone) +#endif /* HAVE_NEXT_ZONE */ + +/* Source linux/mm/vmstat.c */ +#ifndef HAVE_GET_ZONE_COUNTS +typedef void (*get_zone_counts_t)(unsigned long *, unsigned long *, + unsigned long *); +extern get_zone_counts_t get_zone_counts_fn; +#define get_zone_counts(a,i,f) get_zone_counts_fn(a,i,f) +#endif /* HAVE_GET_ZONE_COUNTS */ + + #define xcopyin(from, to, size) copy_from_user(to, from, size) #define xcopyout(from, to, size) copy_to_user(to, from, size) |