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| author | Jim Cromie <jim.cromie@gmail.com> | 2012-04-27 14:30:39 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-30 16:25:39 -0400 |
| commit | 4107692760db8160a65347f7bb2fa7fa7bf9b0d1 (patch) | |
| tree | 7e729fc32c723bc8fa77e852f3bf9308822fa653 /lib/dynamic_debug.c | |
| parent | af442399fcf378a21ffe924b182f6d9ee70001ca (diff) | |
| download | lwn-4107692760db8160a65347f7bb2fa7fa7bf9b0d1.tar.gz lwn-4107692760db8160a65347f7bb2fa7fa7bf9b0d1.zip | |
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/dynamic_debug.c')
| -rw-r--r-- | lib/dynamic_debug.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 66e0ec4d21f7..76da6aa66ce7 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') { |