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authorJim Cromie <jim.cromie@gmail.com>2012-04-27 14:30:39 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-04-30 16:25:39 -0400
commit4107692760db8160a65347f7bb2fa7fa7bf9b0d1 (patch)
tree7e729fc32c723bc8fa77e852f3bf9308822fa653 /lib
parentaf442399fcf378a21ffe924b182f6d9ee70001ca (diff)
downloadlinux-4107692760db8160a65347f7bb2fa7fa7bf9b0d1.tar.gz
dynamic_debug: print ram usage by ddebug tables if verbose
Print ram usage of dynamic-debug tables and verbose section so user knows cost of enabling CONFIG_DYNAMIC_DEBUG. This only counts the size of the _ddebug tables for builtins and the __verbose section that they refer to, not those used in loadable modules. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Acked-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/dynamic_debug.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 66e0ec4d21f..76da6aa66ce 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -970,7 +970,8 @@ static int __init dynamic_debug_init(void)
const char *modname = NULL;
char *cmdline;
int ret = 0;
- int n = 0;
+ int n = 0, entries = 0, modct = 0;
+ int verbose_bytes = 0;
if (__start___verbose == __stop___verbose) {
pr_warn("_ddebug table is empty in a "
@@ -981,7 +982,12 @@ static int __init dynamic_debug_init(void)
modname = iter->modname;
iter_start = iter;
for (; iter < __stop___verbose; iter++) {
+ entries++;
+ verbose_bytes += strlen(iter->modname) + strlen(iter->function)
+ + strlen(iter->filename) + strlen(iter->format);
+
if (strcmp(modname, iter->modname)) {
+ modct++;
ret = ddebug_add_module(iter_start, n, modname);
if (ret)
goto out_err;
@@ -996,6 +1002,10 @@ static int __init dynamic_debug_init(void)
goto out_err;
ddebug_init_success = 1;
+ vpr_info("%d modules, %d entries and %d bytes in ddebug tables,"
+ " %d bytes in (readonly) verbose section\n",
+ modct, entries, (int)( modct * sizeof(struct ddebug_table)),
+ verbose_bytes + (int)(__stop___verbose - __start___verbose));
/* apply ddebug_query boot param, dont unload tables on err */
if (ddebug_setup_string[0] != '\0') {