BlueGreycalmElegant

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Compare Revisions

• This comparison shows the changes necessary to convert path

  → /drivers/video/drm/ttm/ttm_page_alloc.c @ 4111

  → /drivers/video/drm/ttm/ttm_page_alloc.c @ 4112

  ↔ Reverse comparison

• Compare Path:	Rev

  With Path:	Rev

Regard whitespace Rev 4111 → Rev 4112

/drivers/video/drm/ttm/ttm_page_alloc.c
383,22 → 383,19
return nr_free;
}
/* Get good estimation how many pages are free in pools */
static int ttm_pool_get_num_unused_pages(void)
{
unsigned i;
int total = 0;
for (i = 0; i < NUM_POOLS; ++i)
total += _manager->pools[i].npages;
return total;
}
/**
* Callback for mm to request pool to reduce number of page held.
*
* XXX: (dchinner) Deadlock warning!
*
* ttm_page_pool_free() does memory allocation using GFP_KERNEL. that means
* this can deadlock when called a sc->gfp_mask that is not equal to
* GFP_KERNEL.
*
* This code is crying out for a shrinker per pool....
*/
static int ttm_pool_mm_shrink(struct shrinker *shrink,
struct shrink_control *sc)
static unsigned long
ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
{
static atomic_t start_pool = ATOMIC_INIT(0);
unsigned i;
405,6 → 402,7
unsigned pool_offset = atomic_add_return(1, &start_pool);
struct ttm_page_pool *pool;
int shrink_pages = sc->nr_to_scan;
unsigned long freed = 0;
pool_offset = pool_offset % NUM_POOLS;
/* select start pool in round robin fashion */
414,14 → 412,28
break;
pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
shrink_pages = ttm_page_pool_free(pool, nr_free);
freed += nr_free - shrink_pages;
}
/* return estimated number of unused pages in pool */
return ttm_pool_get_num_unused_pages();
return freed;
}
static unsigned long
ttm_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
{
unsigned i;
unsigned long count = 0;
for (i = 0; i < NUM_POOLS; ++i)
count += _manager->pools[i].npages;
return count;
}
static void ttm_pool_mm_shrink_init(struct ttm_pool_manager *manager)
{
manager->mm_shrink.shrink = &ttm_pool_mm_shrink;
manager->mm_shrink.count_objects = ttm_pool_shrink_count;
manager->mm_shrink.scan_objects = ttm_pool_shrink_scan;
manager->mm_shrink.seeks = 1;
register_shrinker(&manager->mm_shrink);
}