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Subject[PATCH] checkstack: pirnt module names
From: Randy Dunlap <rdunlap@xenotime.net>

Finding "init_module" high stack usage problems is challenging
when there are over 1600 "init_module" functions in the kernel tree,
so make checkstack.pl print out the filename where the stack usage
occurs. This is useful for code built as loadable modules.

For built-in code, it just prints the kernel image file name,
like "vmlinux". Examples:

(before patch:)
0x0000000d callback: 1928
0xffffffff81678c09 huft_build: 1560
0x0018 init_module: 1512
(after patch:)
0x0000000d callback [divacapi]: 1928
0xffffffff81678c09 huft_build [vmlinux]: 1560
0x0018 init_module [hdaps]: 1512
Also change one if-series to use elsif to cut down on
unneeded tests.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
---
scripts/checkstack.pl | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
--- linux-2617-rc5mm3.orig/scripts/checkstack.pl
+++ linux-2617-rc5mm3/scripts/checkstack.pl
@@ -89,11 +89,21 @@ sub bysize($) {
#
my $funcre = qr/^$x* <(.*)>:$/;
my $func;
+my $file, $lastslash;
+
while (my $line = <STDIN>) {
if ($line =~ m/$funcre/) {
$func = $1;
}
- if ($line =~ m/$re/) {
+ elsif ($line =~ m/(.*):\s*file format/) {
+ $file = $1;
+ $file =~ s/\.ko//;
+ $lastslash = rindex($file, "/");
+ if ($lastslash != -1) {
+ $file = substr($file, $lastslash + 1);
+ }
+ }
+ elsif ($line =~ m/$re/) {
my $size = $1;
$size = hex($size) if ($size =~ /^0x/);

@@ -109,7 +119,7 @@ while (my $line = <STDIN>) {
$addr =~ s/ /0/g;
$addr = "0x$addr";

- my $intro = "$addr $func:";
+ my $intro = "$addr $func [$file]:";
my $padlen = 56 - length($intro);
while ($padlen > 0) {
$intro .= ' ';

---
-
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