Re: [PATCH] scripts/decode_stacktrace: Accept dash/underscore in modules

[Konstantin Khlebnikov]

On 31.05.2019 23:59, Evan Green wrote:
> The manpage for modprobe mentions that dashes and underscores are
> treated interchangeably in module names. The stack trace dumps seem
> to print module names with underscores. Use bash to replace _ with
> the pattern [-_] so that file names with dashes or underscores can be
> found.
>
> For example, this line:
> [   27.919759]  hda_widget_sysfs_init+0x2b8/0x3a5 [snd_hda_core]
>
> should find a module named snd-hda-core.ko.
>
> Signed-off-by: Evan Green <evgreen@xxxxxxxxxxxx>

Acked-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>

> ---
>
> Note: This should apply atop linux-next.
>
> Thanks to Doug for showing me the bash string substitution magic.
>
> ---
>   scripts/decode_stacktrace.sh | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
> index fa704f17275e..13e5fbafdf2f 100755
> --- a/scripts/decode_stacktrace.sh
> +++ b/scripts/decode_stacktrace.sh
> @@ -28,7 +28,7 @@ parse_symbol() {
>   		local objfile=${modcache[$module]}
>   	else
>   		[[ $modpath == "" ]] && return
> -		local objfile=$(find "$modpath" -name "$module.ko*" -print -quit)
> +		local objfile=$(find "$modpath" -name "${module//_/[-_]}.ko*" -print -quit)
>   		[[ $objfile == "" ]] && return
>   		modcache[$module]=$objfile
>   	fi