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From: Richard Weinberger <richard.weinberger@gmail.com>
To: Marcin Niesluchowski <m.niesluchow@samsung.com>
Cc: "linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	"open list:ABI/API" <linux-api@vger.kernel.org>,
	Jonathan Corbet <corbet@lwn.net>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Petr Mladek <pmladek@suse.cz>, Tejun Heo <tj@kernel.org>,
	Kay Sievers <kay@vrfy.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Joe Perches <joe@perches.com>,
	Karol Lewandowski <k.lewandowsk@samsung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Subject: Re: [RFC 0/8] Additional kmsg devices
Date: Fri, 3 Jul 2015 13:21:43 +0200	[thread overview]
Message-ID: <CAFLxGvxvaePEyCpLrB1cjNn4bvnCwt-_HE3zcT-6diMYNOraBw@mail.gmail.com> (raw)
In-Reply-To: <1435920595-30879-1-git-send-email-m.niesluchow@samsung.com>

On Fri, Jul 3, 2015 at 12:49 PM, Marcin Niesluchowski
<m.niesluchow@samsung.com> wrote:
> Dear All,
>
> This series of patches extends kmsg interface with ability to dynamicaly
> create (and destroy) kmsg-like devices which can be used by user space
> for logging. Logging to kernel has number of benefits, including but not
> limited to - always available, requiring no userspace, automatically
> rotating and low overhead.
>
> User-space logging to kernel cyclic buffers was already successfully used
> in android logger concept but it had certain flaws that this commits try
> to address:
> * drops hardcoded number of devices and static paths in favor for dynamic
>   configuration by ioctl interface in userspace
> * extends existing driver instead of creating completely new one

So, now we start moving syslogd into kernel land because userspace is
too broken to provide
decent logging?

I can understand the systemd is using kmsg if no other logging service
is available
but I really don't think we should encourage other programs to do so.

Why can't you just make sure that your target has a working
syslogd/rsyslogd/journald/whatever?
All can be done perfectly fine in userspace.

Just my two cents.

-- 
Thanks,
//richard

  parent reply	other threads:[~2015-07-03 11:21 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-03 10:49 [RFC 0/8] Additional kmsg devices Marcin Niesluchowski
2015-07-03 10:49 ` [RFC 3/8] kmsg: introduce additional kmsg devices support Marcin Niesluchowski
2015-07-08 11:10   ` Petr Mladek
2015-07-03 10:49 ` [RFC 4/8] kmsg: add function for adding and deleting additional buffers Marcin Niesluchowski
2015-07-03 10:49 ` [RFC 5/8] kmsg: device support in mem class Marcin Niesluchowski
     [not found]   ` <1435920595-30879-6-git-send-email-m.niesluchow-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2015-07-03 15:39     ` Greg Kroah-Hartman
2015-07-03 10:49 ` [RFC 6/8] kmsg: add predefined _PID, _TID, _COMM keywords to kmsg* log dict Marcin Niesluchowski
     [not found] ` <1435920595-30879-1-git-send-email-m.niesluchow-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2015-07-03 10:49   ` [RFC 1/8] printk: move code regarding log message storing format Marcin Niesluchowski
2015-07-03 10:49   ` [RFC 2/8] printk: add one function for storing log in proper format Marcin Niesluchowski
2015-07-03 10:49   ` [RFC 7/8] kmsg: add ioctl for adding and deleting kmsg* devices Marcin Niesluchowski
2015-07-03 10:49   ` [RFC 8/8] kmsg: add ioctl for kmsg* devices operating on buffers Marcin Niesluchowski
2015-07-03 11:21 ` Richard Weinberger [this message]
     [not found]   ` <CAFLxGvxvaePEyCpLrB1cjNn4bvnCwt-_HE3zcT-6diMYNOraBw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-07-03 15:09     ` [RFC 0/8] Additional kmsg devices Marcin Niesluchowski
     [not found]       ` <5596A58F.7090208-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2015-07-03 16:57         ` Andy Lutomirski
2015-07-07 13:11       ` Petr Mladek
2015-07-07 17:10         ` Karol Lewandowski
2015-07-08 10:45           ` Petr Mladek
     [not found]       ` <5596A80D.5040109@nod.at>
2015-07-08  8:30         ` Marcin Niesluchowski
     [not found]           ` <559CE110.70503@nod.at>
2015-07-08 11:17             ` Bartlomiej Zolnierkiewicz

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