]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
mm/memcontrol.c: make the walk_page_range() limit obvious
authorJames Morse <james.morse@arm.com>
Sat, 8 Oct 2016 00:00:12 +0000 (17:00 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 8 Oct 2016 01:46:28 +0000 (18:46 -0700)
commit0247f3f4d78a475cd3181dc9fc162fdef773aaaa
tree2e7c179bbed1aa445b8305071dcbf44ce7d299a3
parent6fcb52a56ff60d240f06296b12827e7f20d45f63
mm/memcontrol.c: make the walk_page_range() limit obvious

mem_cgroup_count_precharge() and mem_cgroup_move_charge() both call
walk_page_range() on the range 0 to ~0UL, neither provide a pte_hole
callback, which causes the current implementation to skip non-vma
regions.  This is all fine but follow up changes would like to make
walk_page_range more generic so it is better to be explicit about which
range to traverse so let's use highest_vm_end to explicitly traverse
only user mmaped memory.

[mhocko@kernel.org: rewrote changelog]
Link: http://lkml.kernel.org/r/1472655897-22532-1-git-send-email-james.morse@arm.com
Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memcontrol.c