static LIST_HEAD(shrinker_list);
static DEFINE_MUTEX(shrinker_lock);
+void shrinker_free(struct shrinker *s)
+{
+ if (s->list.next) {
+ mutex_lock(&shrinker_lock);
+ list_del(&s->list);
+ mutex_unlock(&shrinker_lock);
+ }
+ free(s);
+}
+
struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...)
{
return calloc(sizeof(struct shrinker), 1);
return 0;
}
-void unregister_shrinker(struct shrinker *shrinker)
-{
- mutex_lock(&shrinker_lock);
- list_del(&shrinker->list);
- mutex_unlock(&shrinker_lock);
-}
-
-struct meminfo {
- u64 total;
- u64 available;
-};
-
-void si_meminfo(struct sysinfo *val)
-{
- long page_size = sysconf(_SC_PAGESIZE);
- memset(val, 0, sizeof(*val));
- val->mem_unit = 1;
-
- val->totalram = sysconf(_SC_PHYS_PAGES) * page_size;
- val->freeram = sysconf(_SC_AVPHYS_PAGES) * page_size;
-}
-
static void run_shrinkers_allocation_failed(gfp_t gfp_mask)
{
struct shrinker *shrinker;
{
struct shrinker *shrinker;
struct sysinfo info;
- struct mallinfo malloc_info = mallinfo();
s64 want_shrink;
if (!(gfp_mask & GFP_KERNEL))
si_meminfo(&info);
- if (info.totalram && info.totalram >> 4 < info.freeram) {
- /* freeram goes up when system swaps, use malloced data instead */
- want_shrink = -malloc_info.arena + (info.totalram / 10 * 8);
-
- if (want_shrink <= 0)
- return;
- } else {
- /* We want to play nice with other apps keep 6% avaliable, free 3% */
- want_shrink = (info.totalram >> 5);
- }
+ /* Aim for 6% of physical RAM free without anything in swap */
+ want_shrink = (info.totalram >> 4) - info.freeram
+ + info.totalswap - info.freeswap;
+ if (want_shrink <= 0)
+ return;
mutex_lock(&shrinker_lock);
list_for_each_entry(shrinker, &shrinker_list, list) {