From 70e6ed92abbca575f03f5a28402ef1eb9a6b97b8 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 21 Jul 2014 16:15:24 +0100
Subject: linux: Flush page/buffer cache before querying available memory

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 lib/intel_os.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'lib/intel_os.c')

diff --git a/lib/intel_os.c b/lib/intel_os.c
index 2a29cc02..0d4f43da 100644
--- a/lib/intel_os.c
+++ b/lib/intel_os.c
@@ -98,7 +98,14 @@ intel_get_avail_ram_mb(void)
 
 #ifdef HAVE_STRUCT_SYSINFO_TOTALRAM /* Linux */
 	struct sysinfo sysinf;
-	int ret;
+	int fd, ret;
+
+	fd = open("/proc/sys/vm/drop_caches", O_RDWR);
+	if (fd != -1) {
+		ret = write(fd, "3", 2);
+		close(fd);
+		(void)ret;
+	}
 
 	ret = sysinfo(&sysinf);
 	assert(ret == 0);
-- 
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