From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Hocko Date: Tue, 12 Feb 2019 09:53:43 +0000 Subject: [PATCH 2/2] mm: be more verbose about zonelist initialization Message-Id: <20190212095343.23315-3-mhocko@kernel.org> List-Id: References: <20190212095343.23315-1-mhocko@kernel.org> In-Reply-To: <20190212095343.23315-1-mhocko@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-mm@kvack.org Cc: Pingfan Liu , Dave Hansen , Peter Zijlstra , x86@kernel.org, Benjamin Herrenschmidt , Michael Ellerman , Tony Luck , linuxppc-dev@lists.ozlabs.org, linux-ia64@vger.kernel.org, LKML , Ingo Molnar , Michal Hocko From: Michal Hocko 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. Signed-off-by: Michal Hocko --- mm/page_alloc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 2e097f336126..c30d59f803fb 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5259,6 +5259,11 @@ static void build_zonelists(pg_data_t *pgdat) 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 -- 2.20.1