From: David Miller <davem@davemloft.net>
To: tj@kernel.org
Cc: penguin-kernel@I-love.SAKURA.ne.jp, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCHSET] printk, netconsole: implement reliable netconsole
Date: Fri, 17 Apr 2015 13:17:12 -0400 (EDT) [thread overview]
Message-ID: <20150417.131712.1245246947203158168.davem@davemloft.net> (raw)
In-Reply-To: <20150417162826.GB16743@htj.duckdns.org>
From: Tejun Heo <tj@kernel.org>
Date: Fri, 17 Apr 2015 12:28:26 -0400
> On Sat, Apr 18, 2015 at 12:35:06AM +0900, Tetsuo Handa wrote:
>> If the sender side can wait for retransmission, why can't we use
>> userspace programs (e.g. rsyslogd)?
>
> Because the system may be oopsing, ooming or threshing excessively
> rendering the userland inoperable and that's exactly when we want
> those log messages to be transmitted out of the system.
If userland cannot run properly, it is almost certain that neither will
your complex reliability layer logic.
I tend to agree with Tetsuo, that in-kernel netconsole should remain
as simple as possible and once it starts to have any smarts and less
trivial logic the job belongs in userspace.
next prev parent reply other threads:[~2015-04-17 17:17 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-16 23:03 [PATCHSET] printk, netconsole: implement reliable netconsole Tejun Heo
2015-04-16 23:03 ` [PATCH 01/16] printk: guard the amount written per line by devkmsg_read() Tejun Heo
2015-04-20 12:11 ` Petr Mladek
2015-04-20 12:33 ` Petr Mladek
2015-04-16 23:03 ` [PATCH 02/16] printk: factor out message formatting from devkmsg_read() Tejun Heo
2015-04-20 12:30 ` Petr Mladek
2015-04-16 23:03 ` [PATCH 03/16] printk: move LOG_NOCONS skipping into call_console_drivers() Tejun Heo
2015-04-20 12:50 ` Petr Mladek
2015-04-16 23:03 ` [PATCH 04/16] printk: implement support for extended console drivers Tejun Heo
2015-04-20 15:43 ` Petr Mladek
2015-04-21 10:03 ` Petr Mladek
2015-04-27 21:09 ` Tejun Heo
2015-04-28 9:42 ` Petr Mladek
2015-04-28 14:10 ` Tejun Heo
2015-04-28 14:24 ` Petr Mladek
2015-04-16 23:03 ` [PATCH 05/16] printk: implement log_seq_range() and ext_log_from_seq() Tejun Heo
2015-04-16 23:03 ` [PATCH 06/16] netconsole: make netconsole_target->enabled a bool Tejun Heo
2015-04-16 23:03 ` [PATCH 07/16] netconsole: factor out alloc_netconsole_target() Tejun Heo
2015-04-16 23:03 ` [PATCH 08/16] netconsole: punt disabling to workqueue from netdevice_notifier Tejun Heo
2015-04-16 23:03 ` [PATCH 09/16] netconsole: replace target_list_lock with console_lock Tejun Heo
2015-04-16 23:03 ` [PATCH 10/16] netconsole: introduce netconsole_mutex Tejun Heo
2015-04-16 23:03 ` [PATCH 11/16] netconsole: consolidate enable/disable and create/destroy paths Tejun Heo
2015-04-16 23:03 ` [PATCH 12/16] netconsole: implement extended console support Tejun Heo
2015-04-16 23:03 ` [PATCH 13/16] netconsole: implement retransmission support for extended consoles Tejun Heo
2015-04-16 23:03 ` [PATCH 14/16] netconsole: implement ack handling and emergency transmission Tejun Heo
2015-04-16 23:03 ` [PATCH 15/16] netconsole: implement netconsole receiver library Tejun Heo
2015-04-16 23:03 ` [PATCH 16/16] netconsole: update documentation for extended netconsole Tejun Heo
2015-04-17 15:35 ` [PATCHSET] printk, netconsole: implement reliable netconsole Tetsuo Handa
2015-04-17 16:28 ` Tejun Heo
2015-04-17 17:17 ` David Miller [this message]
2015-04-17 17:37 ` Tejun Heo
2015-04-17 17:43 ` Tetsuo Handa
2015-04-17 17:45 ` Tejun Heo
2015-04-17 18:03 ` Tetsuo Handa
2015-04-17 18:07 ` Tejun Heo
2015-04-17 18:20 ` Tetsuo Handa
2015-04-17 18:26 ` Tejun Heo
2015-04-18 13:09 ` Tetsuo Handa
2015-04-17 18:04 ` Tejun Heo
2015-04-17 18:55 ` David Miller
2015-04-17 19:52 ` Tejun Heo
2015-04-17 20:06 ` David Miller
2015-04-21 21:51 ` Stephen Hemminger
2015-04-19 7:25 ` Rob Landley
2015-04-20 12:00 ` David Laight
2015-04-20 14:33 ` Tejun Heo
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