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Date:   Tue, 24 Jan 2017 11:27:23 +0000
From:   Mel Gorman <>
To:     Andrew Morton <>
Cc:     Linux Kernel <>,
        Linux-MM <>,
        Hillf Danton <>,
        Vlastimil Babka <>,
        Jesper Dangaard Brouer <>
Subject: [PATCH] mm, page_alloc: Split buffered_rmqueue -fix

Vlastimil Babka pointed out that a failed per-cpu refill on a kernel with
CONFIG_DEBUG_VM may blow up on a VM_BUG_ON_PAGE. This patch is a fix
to the mmotm patch mm-page_alloc-split-buffered_rmqueue.patch

Signed-off-by: Mel Gorman <>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index c075831c3a1a..5a04636ccc05 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2697,7 +2697,7 @@ struct page *rmqueue(struct zone *preferred_zone,
-	VM_BUG_ON_PAGE(bad_range(zone, page), page);
+	VM_BUG_ON_PAGE(page && bad_range(zone, page), page);
 	return page;

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