linux-kernel - string_selftest_init needs 636 ms to run

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Message-ID: <26ba21d8-c11f-4042-8f04-56f9bd582fd8@molgen.mpg.de>
Date:   Mon, 12 Mar 2018 14:45:38 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Matthew Wilcox <mawilcox@...rosoft.com>,
        Shuah Khan <shuah@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: string_selftest_init needs 636 ms to run

Dear Geert,

Sorry for writing you directory, but I saw you created the module 
*string_selftest* in commit d6b28e09 (lib: add module support to string 
tests).

I believe, I only did `make olddefconfig`, and the option is selected.

```
$ grep STRING_SELFTEST .config
CONFIG_STRING_SELFTEST=y
```

But booting with `initcall_debug` and looking at the systemd-bootchart 
output in `/run/log`, doing this lasts 600 ms on my ASRock E350M1 with 
Linux 4.16-rc5 (probably since the 4.15 cycle).

 > string_selftest_init 636.2ms

If I didn’t do anything incorrectly, should the module be disable by 
default?

Kind regards,

Paul

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