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Date: Mon, 17 Jul 2006 22:09:05 -0600
From: Dave Kleikamp <shaggy@austin.ibm.com>
Message-Id: <20060718040903.11926.75564.sendpatchset@kleikamp.austin.ibm.com>
In-Reply-To: <20060718040804.11926.76333.sendpatchset@kleikamp.austin.ibm.com>
References: <20060718040804.11926.76333.sendpatchset@kleikamp.austin.ibm.com>
Subject: [RFC:PATCH 007/008] Make sure tail page is freed correctly
Sender: owner-linux-mm@kvack.org
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To: linux-mm <linux-mm@kvack.org>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>, Dave McCracken <dmccr@us.ibm.com>, Badari Pulavarty <pbadari@us.ibm.com>
List-ID: <linux-mm.kvack.org>

Make sure tail page is freed correctly

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
---
diff -Nurp linux006/mm/page_alloc.c linux007/mm/page_alloc.c
--- linux006/mm/page_alloc.c	2006-06-17 20:49:35.000000000 -0500
+++ linux007/mm/page_alloc.c	2006-07-17 23:04:38.000000000 -0500
@@ -37,6 +37,7 @@
 #include <linux/nodemask.h>
 #include <linux/vmalloc.h>
 #include <linux/mempolicy.h>
+#include <linux/file_tail.h>
 
 #include <asm/tlbflush.h>
 #include <asm/div64.h>
@@ -733,6 +734,13 @@ static void fastcall free_hot_cold_page(
 	struct per_cpu_pages *pcp;
 	unsigned long flags;
 
+#ifdef CONFIG_FILE_TAILS
+	if (PageTail(page)) {
+		/* Not a real page */
+		page_cache_free_tail(page);
+		return;
+	}
+#endif
 	arch_free_page(page, 0);
 
 	if (PageAnon(page))

-- 
David Kleikamp
IBM Linux Technology Center

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