EVOLUTION-MANAGER

Edit File: shrinker.h

#ifndef _LINUX_SHRINKER_H #define _LINUX_SHRINKER_H /* * This struct is used to pass information from page reclaim to the shrinkers. * We consolidate the values for easier extention later. */ struct shrink_control { gfp_t gfp_mask; /* How many slab objects shrinker() should scan and try to reclaim */ unsigned long nr_to_scan; }; /* * A callback you can register to apply pressure to ageable caches. * * 'sc' is passed shrink_control which includes a count 'nr_to_scan' * and a 'gfpmask'. It should look through the least-recently-used * 'nr_to_scan' entries and attempt to free them up. It should return * the number of objects which remain in the cache. If it returns -1, it means * it cannot do any scanning at this time (eg. there is a risk of deadlock). * * The 'gfpmask' refers to the allocation we are currently trying to * fulfil. * * Note that 'shrink' will be passed nr_to_scan == 0 when the VM is * querying the cache size, so a fastpath for that case is appropriate. */ struct shrinker { int (*shrink)(struct shrinker *, struct shrink_control *sc); int seeks; /* seeks to recreate an obj */ long batch; /* reclaim batch size, 0 = default */ /* These are for internal use */ struct list_head list; atomic_long_t nr_in_batch; /* objs pending delete */ }; #define DEFAULT_SEEKS 2 /* A good number if you don't know better. */ extern void register_shrinker(struct shrinker *); extern void unregister_shrinker(struct shrinker *); #endif