Commit 8ad2914d authored Jun 25, 2006 by Randy Dunlap Committed by Linus Torvalds Jun 25, 2006

[PATCH] checkstack: print module names



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>
Acked-by: Joern Engel <joern@wh.fh-wedel.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 5ec3e4b7

scripts/checkstack.pl

+12 −2

Original line number	Diff line number	Diff line
		@@ -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/(.):\sfile 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 .= ' ';