linux-kernel - Re: [PATCH] printk: add KERN_NOTIME to skip the timestamp

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Message-ID: <20190214012612.GA25915@jagdpanzerIV>
Date:   Thu, 14 Feb 2019 10:26:12 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     xiang xiao <xiaoxiang781216@...il.com>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        linux-kernel@...r.kernel.org, Xiang Xiao <xiaoxiang@...omi.com>
Subject: Re: [PATCH] printk: add KERN_NOTIME to skip the timestamp

On (02/13/19 09:31), Steven Rostedt wrote:
> > Without this patch:
> > [   10.991426] virtio_rpmsg_bus virtio1: rpmsg host is online
> > [   10.991443] remoteproc remoteproc1: registered virtio1 (type 7)
> > [   10.991450] remoteproc remoteproc1: remote processor
> > f9210000.toppwr:sen-rproc is now up
> > [   10.993715] virtio_rpmsg_bus virtio1: creating channel
> > rpmsg-ttySENSOR addr 0x1
> > [   10.994606] virtio_rpmsg_bus virtio1: creating channel rpmsg-ttyGPS addr 0x2
> > [   10.995236] virtio_rpmsg_bus virtio1: creating channel rpmsg-clk addr 0x3
> > [   10.995702] virtio_rpmsg_bus virtio1: creating channel rpmsg-syslog addr 0x4
> > [   10.996197] virtio_rpmsg_bus virtio1: creating channel rpmsg-rtc addr 0x5
> > [   10.997297] virtio_rpmsg_bus virtio1: creating channel rpmsg-hostfs addr 0x6
> > [   10.999842] virtio_rpmsg_bus virtio1: creating channel rpmsg-usrsock addr 0x7
> > [   11.105345][     0.007680] sensor: NuttX sensor 7.28 e3c2ecb Feb 12
> > 2019 16:53:49 arm song/banks
> > ^^^^^^^^^^^^^^^^^^^^^^^^^^
> > [   11.918177] random: crng init done
> > [   12.567362] e2fsck: e2fsck 1.42.9 (28-Dec-2013)
> > 
> > Which one do you think better?
> 
> Honestly, the one without the patch.

+1

> Seriously, it also makes it easy to see where that message happened
> with respect to the other printks. With your patch, we would have no
> idea, and if I was a normal user, unaware of this patch, I would
> probably submit a bug report claiming that something is wrong with the
> timestamps.

+1

	-ss