From: Christian König christian.koenig@amd.com
Try to allocate huge pages when it makes sense.
v2: avoid compound pages for now
Signed-off-by: Christian König christian.koenig@amd.com Acked-by: Felix Kuehling Felix.Kuehling@amd.com Acked-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/ttm/ttm_page_alloc.c | 50 ++++++++++++++++++++++++++++++------ 1 file changed, 42 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c index 6c852e8..1bc6053 100644 --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c @@ -685,12 +685,24 @@ static void ttm_put_pages(struct page **pages, unsigned npages, int flags,
if (pool == NULL) { /* No pool for this memory type so free the pages */ - for (i = 0; i < npages; i++) { - if (pages[i]) { - if (page_count(pages[i]) != 1) - pr_err("Erroneous page count. Leaking pages.\n"); - __free_page(pages[i]); - pages[i] = NULL; + i = 0; + while (i < npages) { + unsigned order; + + if (!pages[i]) { + ++i; + continue; + } + + if (page_count(pages[i]) != 1) + pr_err("Erroneous page count. Leaking pages.\n"); + order = compound_order(pages[i]); + __free_pages(pages[i], order); + + order = 1 << order; + while (order) { + pages[i++] = NULL; + --order; } } return; @@ -740,12 +752,33 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
/* No pool for cached pages */ if (pool == NULL) { + unsigned i, j; + if (flags & TTM_PAGE_FLAG_DMA32) gfp_flags |= GFP_DMA32; else gfp_flags |= GFP_HIGHUSER;
- for (r = 0; r < npages; ++r) { + i = 0; +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + while (npages >= HPAGE_PMD_NR) { + gfp_t huge_flags = gfp_flags; + + huge_flags |= GFP_TRANSHUGE; + huge_flags &= ~__GFP_MOVABLE; + huge_flags &= ~__GFP_COMP; + p = alloc_pages(huge_flags, HPAGE_PMD_ORDER); + if (!p) + break; + + for (j = 0; j < HPAGE_PMD_NR; ++j) + pages[i++] = p++; + + npages -= HPAGE_PMD_NR; + } +#endif + + while (npages) { p = alloc_page(gfp_flags); if (!p) {
@@ -753,7 +786,8 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags, return -ENOMEM; }
- pages[r] = p; + pages[i++] = p; + --npages; } return 0; }