From a782fc8cc6bf6909daf3b65630079e2afec316ef Mon Sep 17 00:00:00 2001 From: Monk Liu Date: Fri, 1 Dec 2017 18:21:34 +0800 Subject: drm/ttm: fix incorrect calculate on shrink_pages MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit shrink_pages is in unit of Order after ttm_page_pool_free, but it is used by nr_free in next round so need change it into native page unit Signed-off-by: Monk Liu Reviewed-by: Roger He Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/ttm/ttm_page_alloc.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/gpu/drm/ttm/ttm_page_alloc.c') diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c index 44343a2bf55c..71945ccaf012 100644 --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c @@ -455,6 +455,7 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) freed += (nr_free_pool - shrink_pages) << pool->order; if (freed >= sc->nr_to_scan) break; + shrink_pages <<= pool->order; } mutex_unlock(&lock); return freed; -- cgit v1.2.3 From 13d3fc69a03721d972460fe2bff9b479f7999221 Mon Sep 17 00:00:00 2001 From: Monk Liu Date: Fri, 1 Dec 2017 18:23:56 +0800 Subject: drm/ttm: max_cpages is in unit of native page MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit fix calculation. Signed-off-by: Monk Liu Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/ttm/ttm_page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/ttm/ttm_page_alloc.c') diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c index 71945ccaf012..b5ba6441489f 100644 --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c @@ -544,7 +544,7 @@ static int ttm_alloc_new_pages(struct list_head *pages, gfp_t gfp_flags, int r = 0; unsigned i, j, cpages; unsigned npages = 1 << order; - unsigned max_cpages = min(count, (unsigned)NUM_PAGES_TO_ALLOC); + unsigned max_cpages = min(count << order, (unsigned)NUM_PAGES_TO_ALLOC); /* allocate array for page caching change */ caching_array = kmalloc(max_cpages*sizeof(struct page *), GFP_KERNEL); -- cgit v1.2.3 From 19d859a7205bc59ffc38303eb25ae394f61d21dc Mon Sep 17 00:00:00 2001 From: Xiongwei Song Date: Tue, 2 Jan 2018 21:24:55 +0800 Subject: drm/ttm: check the return value of kzalloc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In the function ttm_page_alloc_init, kzalloc call is made for variable _manager, we need to check its return value, it may return NULL. Signed-off-by: Xiongwei Song Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/ttm/ttm_page_alloc.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/ttm/ttm_page_alloc.c') diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c index b5ba6441489f..5d252fb27a82 100644 --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c @@ -1007,6 +1007,8 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages) pr_info("Initializing pool allocator\n"); _manager = kzalloc(sizeof(*_manager), GFP_KERNEL); + if (!_manager) + return -ENOMEM; ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc", 0); -- cgit v1.2.3