- unsigned long flags;
- int prio; /* swap priority */
- int next; /* next entry on swap list */
- struct file *swap_file;
- struct block_device *bdev;
- struct list_head extent_list;
- struct swap_extent *curr_swap_extent;
- unsigned short *swap_map;
- unsigned int lowest_bit;
- unsigned int highest_bit;
+ unsigned long flags; /* SWP_USED etc: see above */
+ signed short prio; /* swap priority of this type */
+ signed char type; /* strange name for an index */
+ signed char next; /* next type on the swap list */
+ unsigned int max; /* extent of the swap_map */
+ unsigned char *swap_map; /* vmalloc'ed array of usage counts */
+ unsigned int lowest_bit; /* index of first free in swap_map */
+ unsigned int highest_bit; /* index of last free in swap_map */
+ unsigned int pages; /* total of usable pages of swap */
+ unsigned int inuse_pages; /* number of those currently in use */
+ unsigned int cluster_next; /* likely index for next allocation */
+ unsigned int cluster_nr; /* countdown to next cluster search */