linux-kernel - Re: [PATCH 2/2] printk: make sure to print log on console.

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Message-ID: <20180531105215.GF477@jagdpanzerIV>
Date:   Thu, 31 May 2018 19:52:15 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Maninder Singh <maninder1.s@...sung.com>
Cc:     pmladek@...e.com, sergey.senozhatsky@...il.com,
        rostedt@...dmis.org, linux-kernel@...r.kernel.org,
        a.sahrawat@...sung.com, pankaj.m@...sung.com, v.narang@...sung.com
Subject: Re: [PATCH 2/2] printk: make sure to print log on console.

On (05/31/18 15:49), Maninder Singh wrote:
> 
> This patch make sure printing of log if loglevel at time of storing
> log is greater than current console loglevel.
> 
> @why
> In case of async printk, printk thread can miss logs because it checks
> current log level at time of console_unlock.

Upstream printk has no printing kthread. And we also run
printk()->console_unlock() with disabled preemption.

	-ss