Add proc entry to display cache info

1 files changed, 22 insertions, 1 deletions

diff --git a/litmus/color_proc.c b/litmus/color_proc.c
index adf38a80f93a..1d46496542c9 100644
--- a/litmus/color_proc.c
+++ b/litmus/color_proc.c
@@ -28,6 +28,9 @@ static struct color_cpu_server color_cpu_servers[NR_CPUS];
 /* the + 1 is for the sentinel element */
 static struct ctl_table color_cpu_tables[NR_CPUS + 1];
 
+#define INFO_BUFFER_SIZE 100
+static char info_buffer[100];
+
 #define NR_PAGES_INDEX 0 /* location of nr_pages in the table below */
 static struct ctl_table color_table[] =
 {
@@ -53,6 +56,13 @@ static struct ctl_table color_table[] =
                 .extra1         = &zero,
                 .extra2         = &one,
         },
+        {
+                .procname       = "cache_info",
+                .mode           = 0444,
+                .proc_handler   = proc_dostring,
+                .data           = info_buffer,
+                .maxlen         = INFO_BUFFER_SIZE,
+        },
         { }
 };
 
@@ -69,7 +79,7 @@ static struct ctl_table litmus_table[] =
 static struct ctl_table litmus_dir_table[] = {
         {
                 .procname       = "litmus",
-                .mode           = 0555,
+                .mode           = 0555,
                 .child          = litmus_table,
         },
         { }
@@ -182,6 +192,17 @@ static int __init litmus_sysctl_init(void)
         ret = init_server_entries();
         if (ret)
                 goto out;
+
+        snprintf(info_buffer, INFO_BUFFER_SIZE,
+                 "Cache size\t: %lu B\n"
+                 "Line size\t: %lu B\n"
+                 "Ways\t\t: %lu\n"
+                 "Sets\t\t: %lu\n"
+                 "Colors\t\t: %lu",
+                 color_cache_info.size, color_cache_info.line_size,
+                 color_cache_info.ways, color_cache_info.sets,
+                 color_cache_info.nr_colors);
+
 out:
         return ret;
 }