On Wed, Jul 08, 2015 at 02:16:36PM -0400, j.glisse at gmail.com wrote:
> From: Jérôme Glisse <jglisse at redhat.com>
>
> Current code never allowed the page pool to actualy fill in anyway.
> This fix it, so that we only start freeing page from the pool when
> we go over the pool size.
>
> Signed-off-by: Jérôme Glisse <jglisse at redhat.com>
> Reviewed-by: Mario Kleiner <mario.kleiner.de at gmail.com>
> Tested-by: Michel Dänzer <michel at daenzer.net>
> Cc: Thomas Hellstrom <thellstrom at vmware.com>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
> ---
> drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 8 +-------
> 1 file changed, 1 insertion(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> index c96db43..0194a93 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> @@ -953,14 +953,8 @@ void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma,
> struct device *dev)
> } else {
> pool->npages_free += count;
> list_splice(&ttm_dma->pages_list, &pool->free_list);
> - npages = count;
> - if (pool->npages_free > _manager->options.max_size) {
> + if (pool->npages_free > _manager->options.max_size)
> npages = pool->npages_free - _manager->options.max_size;
> - /* free at least NUM_PAGES_TO_ALLOC number of pages
> - * to reduce calls to set_memory_wb */
> - if (npages < NUM_PAGES_TO_ALLOC)
> - npages = NUM_PAGES_TO_ALLOC;
> - }
> }
> spin_unlock_irqrestore(&pool->lock, irq_flags);
>
> --
> 1.8.3.1
>
