diff options
| author | Kuo-Hsin Yang <vovoy@chromium.org> | 2018-11-06 13:23:24 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-11-07 15:28:32 +0000 |
| commit | 64e3d12f769d60eaee6d2e53a9b7f0b3814f32ed (patch) | |
| tree | 7038d1180a6a6bd19db14e92336c602686a3e7df /include/linux/swap.h | |
| parent | f45a7977d1140c11f334e01a9f77177ed68e3bfa (diff) | |
mm, drm/i915: mark pinned shmemfs pages as unevictable
The i915 driver uses shmemfs to allocate backing storage for gem
objects. These shmemfs pages can be pinned (increased ref count) by
shmem_read_mapping_page_gfp(). When a lot of pages are pinned, vmscan
wastes a lot of time scanning these pinned pages. In some extreme case,
all pages in the inactive anon lru are pinned, and only the inactive
anon lru is scanned due to inactive_ratio, the system cannot swap and
invokes the oom-killer. Mark these pinned pages as unevictable to speed
up vmscan.
Export pagevec API check_move_unevictable_pages().
This patch was inspired by Chris Wilson's change [1].
[1]: https://patchwork.kernel.org/patch/9768741/
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Kuo-Hsin Yang <vovoy@chromium.org>
Acked-by: Michal Hocko <mhocko@suse.com> # mm part
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20181106132324.17390-1-chris@chris-wilson.co.uk
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'include/linux/swap.h')
| -rw-r--r-- | include/linux/swap.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index 8e2c11e692ba..6c95df96c9aa 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -18,6 +18,8 @@ struct notifier_block; struct bio; +struct pagevec; + #define SWAP_FLAG_PREFER 0x8000 /* set if swap priority specified */ #define SWAP_FLAG_PRIO_MASK 0x7fff #define SWAP_FLAG_PRIO_SHIFT 0 @@ -373,7 +375,7 @@ static inline int node_reclaim(struct pglist_data *pgdat, gfp_t mask, #endif extern int page_evictable(struct page *page); -extern void check_move_unevictable_pages(struct page **, int nr_pages); +extern void check_move_unevictable_pages(struct pagevec *pvec); extern int kswapd_run(int nid); extern void kswapd_stop(int nid); |