The patch titled
Subject: checkstack: sort output by size and function name
has been added to the -mm mm-nonmm-unstable branch. Its filename is
checkstack-sort-output-by-size-and-function-name.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/checkstack-sort-output-by-size-and-function-name.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Heiko Carstens <hca@xxxxxxxxxxxxx>
Subject: checkstack: sort output by size and function name
Date: Mon, 20 Nov 2023 19:37:18 +0100
Sort output by size and in addition by function name. This increases
readability for cases where there are many functions with the same stack
usage.
Link: https://lkml.kernel.org/r/20231120183719.2188479-3-hca@xxxxxxxxxxxxx
Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: Maninder Singh <maninder1.s@xxxxxxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: Vaneet Narang <v.narang@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/checkstack.pl | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
--- a/scripts/checkstack.pl~checkstack-sort-output-by-size-and-function-name
+++ a/scripts/checkstack.pl
@@ -190,5 +190,20 @@ if ($total_size > $min_stack) {
push @stack, "$intro$total_size\n";
}
-# Sort output by size (last field)
-print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;
+# Sort output by size (last field) and function name if size is the same
+sub sort_lines {
+ my ($a, $b) = @_;
+
+ my $num_a = $1 if $a =~ /:\t*(\d+)$/;
+ my $num_b = $1 if $b =~ /:\t*(\d+)$/;
+ my $func_a = $1 if $a =~ / (.*):/;
+ my $func_b = $1 if $b =~ / (.*):/;
+
+ if ($num_a != $num_b) {
+ return $num_b <=> $num_a;
+ } else {
+ return $func_a cmp $func_b;
+ }
+}
+
+print sort { sort_lines($a, $b) } @stack;
_
Patches currently in -mm which might be from hca@xxxxxxxxxxxxx are
checkstack-fix-printed-address.patch
arch-remove-arch_thread_stack_allocator.patch
arch-remove-arch_task_struct_allocator.patch
arch-remove-arch_task_struct_on_stack.patch
checkstack-sort-output-by-size-and-function-name.patch
checkstack-allow-to-pass-minstacksize-parameter.patch
