]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
drm/ttm: Use GFP_TRANSHUGE_LIGHT for allocating huge pages
authorMichel Dänzer <michel.daenzer@amd.com>
Wed, 25 Apr 2018 15:32:10 +0000 (17:32 +0200)
committerAlex Deucher <alexander.deucher@amd.com>
Wed, 9 May 2018 20:16:30 +0000 (15:16 -0500)
commitda291320baec914f0bb4e65a9dccb86bd6c728f2
tree52ee6d36e6a3bc4f684dfe54841fd9aa0971ffee
parentbd4caed47a19f25fe8674344ea06d469c27ac314
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>
drivers/gpu/drm/ttm/ttm_page_alloc.c
drivers/gpu/drm/ttm/ttm_page_alloc_dma.c