mm: fix NUMA accounting in numastat.txt
In Documentation/numastat.txt, it confused me. For example, there are
nodes [0,1] in system.
barrios:~$ cat /proc/zoneinfo | egrep 'numa|zone'
Node 0, zone DMA
numa_hit 33226
numa_miss 1739
numa_foreign 27978
..
..
Node 1, zone DMA
numa_hit 307
numa_miss 46900
numa_foreign 0
1) In node 0, NUMA_MISS means it wanted to allocate page
in node 1 but ended up with page in node 0
2) In node 0, NUMA_FOREIGN means it wanted to allocate page
in node 0 but ended up with page from Node 1.
But now, numastat explains it oppositely about (MISS, FOREIGN).
Let's fix up with viewpoint of zone.
Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/numastat.txt b/Documentation/numastat.txt
index 80133ac..9fcc9a6 100644
--- a/Documentation/numastat.txt
+++ b/Documentation/numastat.txt
@@ -7,10 +7,10 @@
numa_hit A process wanted to allocate memory from this node,
and succeeded.
-numa_miss A process wanted to allocate memory from this node,
- but ended up with memory from another.
-numa_foreign A process wanted to allocate on another node,
- but ended up with memory from this one.
+numa_miss A process wanted to allocate memory from another node,
+ but ended up with memory from this node.
+numa_foreign A process wanted to allocate on this node,
+ but ended up with memory from another one.
local_node A process ran on this node and got memory from it.
other_node A process ran on this node and got memory from another node.
interleave_hit Interleaving wanted to allocate from this node