From: Florian Forster <octo@collectd.org>
Date: Wed, 17 Sep 2014 05:41:38 +0000 (+0200)
Subject: swap plugin: Make "cached" optional under Linux.
X-Git-Tag: collectd-5.3.2~33
X-Git-Url: https://git.tokkee.org/?a=commitdiff_plain;h=1a146775d4;p=collectd.git

swap plugin: Make "cached" optional under Linux.

This is the smallest possible fix for OpenVZ, where cached is not available.
master has a more complete fix which should be used going forward.

Fixes: #733
---

diff --git a/src/swap.c b/src/swap.c
index 46d3534f..1621f7af 100644
--- a/src/swap.c
+++ b/src/swap.c
@@ -339,7 +339,7 @@ static int swap_read_combined (void) /* {{{ */
 
 	fclose (fh);
 
-	if (have_data != 0x07)
+	if ((have_data & 0x03) != 0x03)
 		return (ENOENT);
 
 	if (isnan (swap_total)
@@ -351,7 +351,8 @@ static int swap_read_combined (void) /* {{{ */
 
 	swap_submit_gauge (NULL, "used",   1024.0 * swap_used);
 	swap_submit_gauge (NULL, "free",   1024.0 * swap_free);
-	swap_submit_gauge (NULL, "cached", 1024.0 * swap_cached);
+	if (have_data & 0x04)
+		swap_submit_gauge (NULL, "cached", 1024.0 * swap_cached);
 
 	return (0);
 } /* }}} int swap_read_combined */