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[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>
This commit is contained in:
Randy Dunlap 2006-06-25 05:48:29 -07:00 committed by Linus Torvalds
parent 5ec3e4b7ae
commit 8ad2914d9c
1 changed files with 12 additions and 2 deletions
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14
scripts/checkstack.pl
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@ -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 .= ' ';