Re: [PATCH -v4 2/2] printk: Add kernel parameter to control writes to /dev/kmsg
From: Borislav Petkov
Date: Mon Jul 18 2016 - 00:44:16 EST
On Mon, Jul 18, 2016 at 10:18:09AM +0800, Dave Young wrote:
> I would say avoiding ratelimit during boot make no much sense. Userspace can not
> write to /dev/kmsg when system_state == SYSTEM_BOOTING because init process
> has not run yet.
You're right - kernel_init() sets SYSTEM_RUNNING before running the init
process. I probably should kill all that logic in the second patch.
> I means to set printk.devkmsg=off by default, userspace can set it to
> on by sysctl.
That can't happen: DEVKMSG_LOG_MASK_LOCK.
ECO tip #101: Trim your mails when you reply.