+if node[:kernel] && node[:kernel][:modules]
+ raidmods = node[:kernel][:modules].keys & %w[cciss hpsa mptsas mpt2sas mpt3sas megaraid_mm megaraid_sas aacraid]
+
+ default[:apt][:sources] |= ["hwraid"] unless raidmods.empty?
+end
+
+if node[:kernel][:modules].include?("ipmi_si")
+ default[:hardware][:modules] |= ["ipmi_devintf"]
+end
+
+if File.exist?("/proc/xen")
+ default[:hardware][:watchdog] = "xen_wdt"
+elsif node[:kernel][:modules].include?("i6300esb")
+ default[:hardware][:watchdog] = "none"
+end
+
+if File.exist?("/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor") &&
+ File.read("/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor").chomp == "ondemand"
+ default[:sysfs][:cpufreq_ondemand][:comment] = "Tune the ondemand CPU frequency governor"
+ default[:sysfs][:cpufreq_ondemand][:parameters][:"devices/system/cpu/cpufreq/ondemand/up_threshold"] = "25"
+ default[:sysfs][:cpufreq_ondemand][:parameters][:"devices/system/cpu/cpufreq/ondemand/sampling_down_factor"] = "100"