tools/power turbostat: modprobe msr, if needed
Some distros (Ubuntu) ship the msr driver as a module.
If turbosat is run as root on those systems, and discovers
that there is no /dev/cpu/cpu0/msr, it will now "modprobe msr"
for the user.
If not root, the modprobe attempt will fail, and turbostat will exit as before:
turbostat: no /dev/cpu/0/msr, Try "# modprobe msr" : No such file or directory
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index f05a3f7..50341a3 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -1528,7 +1528,8 @@
struct stat sb;
if (stat("/dev/cpu/0/msr", &sb))
- err(-5, "no /dev/cpu/0/msr, Try \"# modprobe msr\" ");
+ if (system("/sbin/modprobe msr > /dev/null 2>&1"))
+ err(-5, "no /dev/cpu/0/msr, Try \"# modprobe msr\" ");
}
void check_permissions()
@@ -2713,7 +2714,7 @@
}
void print_version() {
- fprintf(stderr, "turbostat version 4.2 23 Mar, 2015"
+ fprintf(stderr, "turbostat version 4.3 24 Mar, 2015"
" - Len Brown <lenb@kernel.org>\n");
}