mm: vmscan: simplify lruvec_lru_size()

Browse source

Patch series "mm: vmscan: cgroup-related cleanups".

Here are 8 patches that clean up the reclaim code's interaction with
cgroups a bit. They're not supposed to change any behavior, just make
the implementation easier to understand and work with.

This patch (of 8):

This function currently takes the node or lruvec size and subtracts the
zones that are excluded by the classzone index of the allocation.  It uses
four different types of counters to do this.

Just add up the eligible zones.

[cai@lca.pw: fix an undefined behavior for zone id]
  Link: http://lkml.kernel.org/r/20191108204407.1435-1-cai@lca.pw
[akpm@linux-foundation.org: deal with the MAX_NR_ZONES special case. per Qian Cai]
  Link: http://lkml.kernel.org/r/64E60F6F-7582-427B-8DD5-EF97B1656F5A@lca.pw
Link: http://lkml.kernel.org/r/20191022144803.302233-2-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

...

This commit is contained in:

Johannes Weiner 2019-11-30 17:55:31 -08:00 • committed by Linus Torvalds

parent cb16556d91

commit de3b01506e

1 changed files with 5 additions and 16 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

21

mm/vmscan.c

View file