linux-kernel - Re: [RESEND PATCH 0/5] perf core: Support overwrite ring buffer

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Message-ID: <20160308183138.GA15747@gmail.com>
Date:	Tue, 8 Mar 2016 19:31:38 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Dmitry Vyukov <dvyukov@...gle.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Wang Nan <wangnan0@...wei.com>, Ingo Molnar <mingo@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	He Kuang <hekuang@...wei.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Brendan Gregg <brendan.d.gregg@...il.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Zefan Li <lizefan@...wei.com>, pi3orama@....com
Subject: Re: [RESEND PATCH 0/5] perf core: Support overwrite ring buffer


* Ingo Molnar <mingo@...nel.org> wrote:

> so it's eating about 10% of system overhead despite doing nothing (!).
> 
> The workaround for that systemd bug is a brutal:
> 
>  [root@...alhaut ~]# mv /usr/lib/systemd/systemd-journald /usr/lib/systemd/systemd-journald.dontuse
>  [root@...alhaut ~]# 

Except that if I do that, systemd stops working altogether - for example:

 [root@...alhaut ~]# systemctl disable audit
 Failed to execute operation: Connection timed out

only reinstating the binary and re-starting journald fixes that.

systemd is the most passive-agressive utility I've ever seen.

So it's not possible to disable journald. Does anyone know any solution for that, 
which does not involve reinstalling a whole distro?

Thanks,

	Ingo