From 0942680f85a3fb0a03bc8c211fcc9d286572c242 Mon Sep 17 00:00:00 2001
From: Adrien Mahieux <adrien.mahieux@gmail.com>
Date: Wed, 18 Sep 2019 14:13:32 +0200
Subject: Collector slabinfo (#6800)

### Summary

Provide new collector parsing `/proc/slabinfo` to provide details on kernel slab structures.

Asked by issue #13 (very happy for the oldest issue in backlog)

##### Component Name

collectors/slabinfo.plugin

##### Additional Information

This slabinfo details allows to have clues on actions done on your system.
In the following screenshot, you can clearly see a `find` done on a ext4 filesystem (the number of `ext4_inode_cache` & `dentry` are rising fast), and a few seconds later, an admin issued a `echo 3 > /proc/sys/vm/drop_cached` as their count dropped.
---
 Makefile.am | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'Makefile.am')

diff --git a/Makefile.am b/Makefile.am
index 0e515db8d3..35d9712cb0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -236,6 +236,11 @@ NFACCT_PLUGIN_FILES = \
     $(LIBNETDATA_FILES) \
     $(NULL)
 
+SLABINFO_PLUGIN_FILES = \
+	collectors/slabinfo.plugin/slabinfo.c \
+	$(LIBNETDATA_FILES)
+	$(NULL)
+
 XENSTAT_PLUGIN_FILES = \
     collectors/xenstat.plugin/xenstat_plugin.c \
     $(LIBNETDATA_FILES) \
@@ -600,6 +605,14 @@ if ENABLE_PLUGIN_PERF
         $(NULL)
 endif
 
+if ENABLE_PLUGIN_SLABINFO
+    plugins_PROGRAMS += slabinfo.plugin
+    slabinfo_plugin_SOURCES = $(SLABINFO_PLUGIN_FILES)
+    slabinfo_plugin_LDADD = \
+        $(NETDATA_COMMON_LIBS) \
+        $(NULL)
+endif
+
 if ENABLE_BACKEND_KINESIS
     netdata_SOURCES += $(KINESIS_BACKEND_FILES)
     netdata_LDADD += $(OPTIONAL_KINESIS_LIBS)
-- 
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