From: Peter Zijlstra <peterz@infradead.org>
To: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>,
Steven Rostedt <rostedt@goodmis.org>,
Borislav Petkov <bp@alien8.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Subject: Re: [RFC][PATCH] printk: increase devkmsg write() ratelimit
Date: Tue, 18 Dec 2018 11:48:12 +0100 [thread overview]
Message-ID: <20181218104812.GC15430@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20181218091842.4996-1-sergey.senozhatsky@gmail.com>
On Tue, Dec 18, 2018 at 06:18:42PM +0900, Sergey Senozhatsky wrote:
> Hello,
>
> RFC
>
> A painful subject:
>
> I just noticed that stock systemd (no systemd debugging enabled) on my
> x86 box write()-s during shutdown to devkmsg more than before, so old
> devkmsg ratelimits do not apply:
>
> $ sudo journalctl -n 40000 -f | grep "kernel: printk: systemd-shutdow"
> kernel: printk: systemd-shutdow: 35 output lines suppressed due to ratelimiting
> kernel: printk: systemd-shutdow: 31 output lines suppressed due to ratelimiting
> kernel: printk: systemd-shutdow: 35 output lines suppressed due to ratelimiting
> kernel: printk: systemd-shutdow: 36 output lines suppressed due to ratelimiting
> kernel: printk: systemd-shutdow: 36 output lines suppressed due to ratelimiting
> kernel: printk: systemd-shutdow: 36 output lines suppressed due to ratelimiting
> kernel: printk: systemd-shutdow: 36 output lines suppressed due to ratelimiting
> kernel: printk: systemd-shutdow: 35 output lines suppressed due to ratelimiting
>
> I know that there is a "kernel.printk_devkmsg" interface; do we
> expect every systemd-enabled distro to find that out and to tweak
> kernel.printk_devkmsg or shall we change the default devkmsg
> ratelimit instead?
How about we complain to systemd instead?
next prev parent reply other threads:[~2018-12-18 10:48 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-18 9:18 [RFC][PATCH] printk: increase devkmsg write() ratelimit Sergey Senozhatsky
2018-12-18 10:48 ` Peter Zijlstra [this message]
2018-12-18 11:17 ` Sergey Senozhatsky
2018-12-18 11:29 ` Peter Zijlstra
2018-12-18 13:09 ` Sergey Senozhatsky
2018-12-18 11:47 ` Borislav Petkov
2018-12-18 13:07 ` Sergey Senozhatsky
2018-12-18 14:26 ` Borislav Petkov
2018-12-18 14:55 ` Sergey Senozhatsky
2018-12-18 15:03 ` Borislav Petkov
2018-12-18 15:14 ` Sergey Senozhatsky
2018-12-18 15:24 ` Borislav Petkov
2018-12-18 16:52 ` Sergey Senozhatsky
2018-12-18 17:21 ` Peter Zijlstra
2018-12-18 17:37 ` Steven Rostedt
2018-12-19 8:50 ` Petr Mladek
2018-12-20 11:35 ` Sergey Senozhatsky
2018-12-20 13:58 ` Steven Rostedt
2018-12-21 7:32 ` Sergey Senozhatsky
2018-12-18 17:47 ` Borislav Petkov
2018-12-19 1:46 ` Sergey Senozhatsky
2018-12-18 14:02 ` Sergey Senozhatsky
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