From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Petr Mladek <pmladek@suse.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.com>,
Steven Rostedt <rostedt@goodmis.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] kconfig: Add kernel config option for fuzz testing.
Date: Tue, 17 Dec 2019 17:24:49 +0900 [thread overview]
Message-ID: <20191217082449.GC54407@google.com> (raw)
In-Reply-To: <CACT4Y+ZV_syKQt6hDwf3WH5-LpFo==rsVsQY7+YCMfpUCtzj_A@mail.gmail.com>
On (19/12/17 08:54), Dmitry Vyukov wrote:
> On Tue, Dec 17, 2019 at 6:12 AM Sergey Senozhatsky
> <sergey.senozhatsky.work@gmail.com> wrote:
> >
> > On (19/12/16 18:59), Tetsuo Handa wrote:
> >
> > Can you fuzz test with `ignore_loglevel'?
>
> We can set ignore_loglevel in syzbot configs, but won't it then print
> everything including verbose debug output?
What would be the most active source of debug output?
dev_dbg(), which is dev_printk(KERN_DEBUG), can be compiled out, if I'm
not mistaken. It probably depends on CONFIG_DEBUG or something similar,
unlike dev_printk(), which depends on CONFIG_PRINTK. It seems that we have
significantly more dev_dbg() users, than direct dev_printk(KERN_DEBUG).
Does fuzz tester hit pr_debug() often? File systems? Some of them
have ways to compile out debugging output as well. E.g. jbd_debug,
_debug, ext4_debug, and so on.
-ss
next prev parent reply other threads:[~2019-12-17 8:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-16 9:59 [PATCH] kconfig: Add kernel config option for fuzz testing Tetsuo Handa
2019-12-16 11:46 ` Greg Kroah-Hartman
2019-12-16 15:35 ` Tetsuo Handa
2019-12-16 16:31 ` Greg Kroah-Hartman
2019-12-16 20:18 ` Theodore Y. Ts'o
2019-12-16 21:06 ` Tetsuo Handa
2019-12-17 8:36 ` Dmitry Vyukov
2019-12-17 8:53 ` Dmitry Vyukov
2020-01-02 19:57 ` Matthew Garrett
2020-02-18 10:54 ` Tetsuo Handa
2020-02-27 22:10 ` Tetsuo Handa
2020-02-27 22:15 ` Matthew Garrett
2019-12-17 15:52 ` Theodore Y. Ts'o
2019-12-19 17:43 ` Dmitry Vyukov
2019-12-19 21:18 ` Theodore Y. Ts'o
2019-12-18 10:29 ` Tetsuo Handa
2019-12-19 17:21 ` Dmitry Vyukov
2019-12-16 18:34 ` Andi Kleen
2019-12-16 18:47 ` Greg Kroah-Hartman
2019-12-17 5:12 ` Sergey Senozhatsky
2019-12-17 7:54 ` Dmitry Vyukov
2019-12-17 8:24 ` Sergey Senozhatsky [this message]
2019-12-17 8:38 ` Dmitry Vyukov
2019-12-17 5:42 ` Masahiro Yamada
2019-12-17 8:41 ` Dmitry Vyukov
2019-12-17 12:54 ` Tetsuo Handa
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