The patch titled
Subject: mm: be more verbose about zonelist initialization
has been added to the -mm tree. Its filename is
mm-be-more-verbose-about-zonelist-initialization.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-be-more-verbose-about-zonelist-initialization.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-be-more-verbose-about-zonelist-initialization.patch
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------------------------------------------------------
From: Michal Hocko <mhocko@xxxxxxxx>
Subject: mm: be more verbose about zonelist initialization
We have seen several bugs where zonelists have not been initialized
properly and it is not really straightforward to track those bugs down.
One way to help a bit at least is to dump zonelists of each node when they
are (re)initialized.
Link: http://lkml.kernel.org/r/20190213094315.3504-1-mhocko@xxxxxxxxxx
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Reviewed-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Reviewed-by: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Pingfan Liu <kernelfans@xxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/mm/page_alloc.c~mm-be-more-verbose-about-zonelist-initialization
+++ a/mm/page_alloc.c
@@ -5530,6 +5530,8 @@ static void build_zonelists(pg_data_t *p
int node, load, nr_nodes = 0;
nodemask_t used_mask;
int local_node, prev_node;
+ struct zone *zone;
+ struct zoneref *z;
/* NUMA-aware ordering of nodes */
local_node = pgdat->node_id;
@@ -5555,6 +5557,11 @@ static void build_zonelists(pg_data_t *p
build_zonelists_in_node_order(pgdat, node_order, nr_nodes);
build_thisnode_zonelists(pgdat);
+
+ pr_info("node[%d] zonelist: ", pgdat->node_id);
+ for_each_zone_zonelist(zone, z, &pgdat->node_zonelists[ZONELIST_FALLBACK], MAX_NR_ZONES-1)
+ pr_cont("%d:%s ", zone_to_nid(zone), zone->name);
+ pr_cont("\n");
}
#ifdef CONFIG_HAVE_MEMORYLESS_NODES
_
Patches currently in -mm which might be from mhocko@xxxxxxxx are
mm-memory_hotplug-cleanup-memory-offline-path.patch
mm-memory_hotplug-provide-a-more-generic-restrictions-for-memory-hotplug.patch
x86-numa-always-initialize-all-possible-nodes.patch
mm-be-more-verbose-about-zonelist-initialization.patch
