diff options
| author | Bas Nieuwenhuizen <basni@chromium.org> | 2018-07-25 23:29:50 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-07-27 23:00:22 +0300 |
| commit | 610b399f1ff269e4b9ec85cfdffb06f9befd0c41 (patch) | |
| tree | 82d0a336bef9ffb53db8142506cd0ee4253e12d0 /drivers/gpu/drm/ttm | |
| parent | d55f9b87428f4732472ec7e9ccb7b4135751996c (diff) | |
| download | linux-610b399f1ff269e4b9ec85cfdffb06f9befd0c41.tar.xz | |
drm/ttm: Merge hugepage attr changes in ttm_dma_page_put. (v2)
Every set_pages_array_wb call resulted in cross-core
interrupts and TLB flushes. Merge more of them for
less overhead.
This reduces the time needed to free a 1.6 GiB GTT WC
buffer as part of Vulkan CTS from ~2 sec to < 0.25 sec.
(Allocation still takes more than 2 sec though)
(v2): use set_pages_wb instead of set_memory_wb.
Signed-off-by: Bas Nieuwenhuizen <basni@chromium.org>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/ttm')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 11 |
1 files changed, 4 insertions, 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 f31148ad981c..8304917294a2 100644 --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c @@ -349,17 +349,14 @@ static void ttm_pool_update_free_locked(struct dma_pool *pool, static void ttm_dma_page_put(struct dma_pool *pool, struct dma_page *d_page) { struct page *page = d_page->p; - unsigned i, num_pages; + unsigned num_pages; /* Don't set WB on WB page pool. */ if (!(pool->type & IS_CACHED)) { num_pages = pool->size / PAGE_SIZE; - for (i = 0; i < num_pages; ++i, ++page) { - if (ttm_set_pages_array_wb(&page, 1)) { - pr_err("%s: Failed to set %d pages to wb!\n", - pool->dev_name, 1); - } - } + if (ttm_set_pages_wb(page, num_pages)) + pr_err("%s: Failed to set %d pages to wb!\n", + pool->dev_name, num_pages); } list_del(&d_page->page_list); |