diff options
| author | Michel Dänzer <michel.daenzer@amd.com> | 2018-04-25 18:32:10 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-05-15 21:44:17 +0300 |
| commit | 00862edba135c30d65b9af863163fdfa1f502c61 (patch) | |
| tree | d5b65af53514cbfacbcfc9caffaf49f936a2a9bd /drivers/gpu/drm/ttm | |
| parent | 87ac8fb08bc7c69a39842c73f3a9d06eb73f02cc (diff) | |
| download | linux-00862edba135c30d65b9af863163fdfa1f502c61.tar.xz | |
drm/ttm: Use GFP_TRANSHUGE_LIGHT for allocating huge pages
GFP_TRANSHUGE tries very hard to allocate huge pages, which can result
in long delays with high memory pressure. I have observed firefox
freezing for up to around a minute due to this while restic was taking
a full system backup.
Since we don't really need huge pages, use GFP_TRANSHUGE_LIGHT |
__GFP_NORETRY instead, in order to fail quickly when there are no huge
pages available.
Set __GFP_KSWAPD_RECLAIM as well, in order for huge pages to be freed
up in the background if necessary.
With these changes, I'm no longer seeing freezes during a restic backup.
Cc: stable@vger.kernel.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@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.c | 11 | ||||
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 3 |
2 files changed, 10 insertions, 4 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c index f0481b7b60c5..06c94e3a5f15 100644 --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c @@ -910,7 +910,8 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags, while (npages >= HPAGE_PMD_NR) { gfp_t huge_flags = gfp_flags; - huge_flags |= GFP_TRANSHUGE; + huge_flags |= GFP_TRANSHUGE_LIGHT | __GFP_NORETRY | + __GFP_KSWAPD_RECLAIM; huge_flags &= ~__GFP_MOVABLE; huge_flags &= ~__GFP_COMP; p = alloc_pages(huge_flags, HPAGE_PMD_ORDER); @@ -1027,11 +1028,15 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages) GFP_USER | GFP_DMA32, "uc dma", 0); ttm_page_pool_init_locked(&_manager->wc_pool_huge, - GFP_TRANSHUGE & ~(__GFP_MOVABLE | __GFP_COMP), + (GFP_TRANSHUGE_LIGHT | __GFP_NORETRY | + __GFP_KSWAPD_RECLAIM) & + ~(__GFP_MOVABLE | __GFP_COMP), "wc huge", order); ttm_page_pool_init_locked(&_manager->uc_pool_huge, - GFP_TRANSHUGE & ~(__GFP_MOVABLE | __GFP_COMP) + (GFP_TRANSHUGE_LIGHT | __GFP_NORETRY | + __GFP_KSWAPD_RECLAIM) & + ~(__GFP_MOVABLE | __GFP_COMP) , "uc huge", order); _manager->options.max_size = max_pages; diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c index 8a25d1974385..f63d99c302e4 100644 --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c @@ -910,7 +910,8 @@ static gfp_t ttm_dma_pool_gfp_flags(struct ttm_dma_tt *ttm_dma, bool huge) gfp_flags |= __GFP_ZERO; if (huge) { - gfp_flags |= GFP_TRANSHUGE; + gfp_flags |= GFP_TRANSHUGE_LIGHT | __GFP_NORETRY | + __GFP_KSWAPD_RECLAIM; gfp_flags &= ~__GFP_MOVABLE; gfp_flags &= ~__GFP_COMP; } |