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| author | Johannes Weiner <hannes@cmpxchg.org> | 2017-05-03 14:52:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-03 15:52:08 -0700 |
| commit | c822f6223d03c2c5b026a21da09c6b6d523258cd (patch) | |
| tree | ac2fdb0a28b2be80c1c1fd407d8a96b6155530e6 /mm/internal.h | |
| parent | 688035f729dcd9a98152c827338805a061f5c6fa (diff) | |
| download | lwn-c822f6223d03c2c5b026a21da09c6b6d523258cd.tar.gz lwn-c822f6223d03c2c5b026a21da09c6b6d523258cd.zip | |
mm: delete NR_PAGES_SCANNED and pgdat_reclaimable()
NR_PAGES_SCANNED counts number of pages scanned since the last page free
event in the allocator. This was used primarily to measure the
reclaimability of zones and nodes, and determine when reclaim should
give up on them. In that role, it has been replaced in the preceding
patches by a different mechanism.
Being implemented as an efficient vmstat counter, it was automatically
exported to userspace as well. It's however unlikely that anyone
outside the kernel is using this counter in any meaningful way.
Remove the counter and the unused pgdat_reclaimable().
Link: http://lkml.kernel.org/r/20170228214007.5621-8-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Jia He <hejianet@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/mm/internal.h b/mm/internal.h index e5a0e0ec2177..a36719572eb9 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -91,7 +91,6 @@ extern unsigned long highest_memmap_pfn; */ extern int isolate_lru_page(struct page *page); extern void putback_lru_page(struct page *page); -extern bool pgdat_reclaimable(struct pglist_data *pgdat); /* * in mm/rmap.c: |