mm: numa: Change page last {nid,pid} into {cpu,pid}

Change the per page last fault tracking to use cpu,pid instead of
nid,pid. This will allow us to try and lookup the alternate task more
easily. Note that even though it is the cpu that is store in the page
flags that the mpol_misplaced decision is still based on the node.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1381141781-10992-43-git-send-email-mgorman@suse.de
[ Fixed build failure on 32-bit systems. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 9 insertions, 9 deletions

diff --git a/mm/mm_init.c b/mm/mm_init.c
index 467de579784b..68562e92d50c 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -71,26 +71,26 @@ void __init mminit_verify_pageflags_layout(void)
         unsigned long or_mask, add_mask;
 
         shift = 8 * sizeof(unsigned long);
-        width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH - LAST_NIDPID_SHIFT;
+        width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH - LAST_CPUPID_SHIFT;
         mminit_dprintk(MMINIT_TRACE, "pageflags_layout_widths",
-                "Section %d Node %d Zone %d Lastnidpid %d Flags %d\n",
+                "Section %d Node %d Zone %d Lastcpupid %d Flags %d\n",
                 SECTIONS_WIDTH,
                 NODES_WIDTH,
                 ZONES_WIDTH,
-                LAST_NIDPID_WIDTH,
+                LAST_CPUPID_WIDTH,
                 NR_PAGEFLAGS);
         mminit_dprintk(MMINIT_TRACE, "pageflags_layout_shifts",
-                "Section %d Node %d Zone %d Lastnidpid %d\n",
+                "Section %d Node %d Zone %d Lastcpupid %d\n",
                 SECTIONS_SHIFT,
                 NODES_SHIFT,
                 ZONES_SHIFT,
-                LAST_NIDPID_SHIFT);
+                LAST_CPUPID_SHIFT);
         mminit_dprintk(MMINIT_TRACE, "pageflags_layout_pgshifts",
-                "Section %lu Node %lu Zone %lu Lastnidpid %lu\n",
+                "Section %lu Node %lu Zone %lu Lastcpupid %lu\n",
                 (unsigned long)SECTIONS_PGSHIFT,
                 (unsigned long)NODES_PGSHIFT,
                 (unsigned long)ZONES_PGSHIFT,
-                (unsigned long)LAST_NIDPID_PGSHIFT);
+                (unsigned long)LAST_CPUPID_PGSHIFT);
         mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodezoneid",
                 "Node/Zone ID: %lu -> %lu\n",
                 (unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT),
@@ -102,9 +102,9 @@ void __init mminit_verify_pageflags_layout(void)
         mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags",
                 "Node not in page flags");
 #endif
-#ifdef LAST_NIDPID_NOT_IN_PAGE_FLAGS
+#ifdef LAST_CPUPID_NOT_IN_PAGE_FLAGS
         mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags",
-                "Last nidpid not in page flags");
+                "Last cpupid not in page flags");
 #endif
 
         if (SECTIONS_WIDTH) {