From: Thomas Gleixner <tglx@linutronix.de>
To: Prarit Bhargava <prarit@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, Mark Salyzyn <salyzyn@android.com>,
Jonathan Corbet <corbet@lwn.net>, Petr Mladek <pmladek@suse.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
John Stultz <john.stultz@linaro.org>,
Stephen Boyd <sboyd@codeaurora.org>,
Andrew Morton <akpm@linux-foundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Christoffer Dall <cdall@linaro.org>,
Deepa Dinamani <deepa.kernel@gmail.com>,
Ingo Molnar <mingo@kernel.org>,
Joel Fernandes <joelaf@google.com>,
Kees Cook <keescook@chromium.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
"Luis R. Rodriguez" <mcgrof@kernel.org>,
Nicholas Piggin <npiggin@gmail.com>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
Olof Johansson <olof@lixom.net>, "Theodore Ts'o" <tytso@mit.edu>,
Josh Poimboeuf <jpoimboe@redhat.com>,
linux-doc@vger.kernel.org
Subject: Re: [PATCH 2/2] printk: Add boottime and real timestamps
Date: Fri, 28 Jul 2017 18:28:13 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.1707281826440.1828@nanos> (raw)
In-Reply-To: <b1bc6a0d-8f9a-387e-6c8e-46d3871f1ab4@redhat.com>
On Fri, 28 Jul 2017, Prarit Bhargava wrote:
> On 07/25/2017 09:00 AM, Peter Zijlstra wrote:
> Thanks for the above change. I can see that makes the code simpler.
>
> > Although I must strongly discourage using REALTIME, DST will make
> > untangling your logs an absolute nightmare. I would simply not provide
> > it.
>
> I understand your concern, however, I've been in situations where REALTIME
> stamping has pointed me in the direction of where a bug was. Even with the
> complicated logs I think it is worthwhile.
As Mark pointed out. ktime_get_real() and the fast variant return UTC. The
timezone mess plus the DST nonsense are done in user space.
Thanks,
tglx
next prev parent reply other threads:[~2017-07-28 16:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-25 12:17 [PATCH 0/2] printk: allow different timestamps for printk.time Prarit Bhargava
2017-07-25 12:17 ` [PATCH 1/2] printk: Make CONFIG_PRINTK_TIME an int Prarit Bhargava
2017-07-25 12:55 ` Luis R. Rodriguez
2017-07-31 17:11 ` Prarit Bhargava
2017-07-25 12:17 ` [PATCH 2/2] printk: Add boottime and real timestamps Prarit Bhargava
2017-07-25 13:00 ` Peter Zijlstra
2017-07-25 22:39 ` Mark Salyzyn
2017-07-28 15:01 ` Prarit Bhargava
2017-07-28 16:28 ` Thomas Gleixner [this message]
2017-07-27 3:02 ` kbuild test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=alpine.DEB.2.20.1707281826440.1828@nanos \
--to=tglx@linutronix.de \
--cc=Jason@zx2c4.com \
--cc=akpm@linux-foundation.org \
--cc=cdall@linaro.org \
--cc=corbet@lwn.net \
--cc=deepa.kernel@gmail.com \
--cc=geert+renesas@glider.be \
--cc=gregkh@linuxfoundation.org \
--cc=joelaf@google.com \
--cc=john.stultz@linaro.org \
--cc=jpoimboe@redhat.com \
--cc=keescook@chromium.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mcgrof@kernel.org \
--cc=mingo@kernel.org \
--cc=npiggin@gmail.com \
--cc=olof@lixom.net \
--cc=paulmck@linux.vnet.ibm.com \
--cc=peterz@infradead.org \
--cc=pmladek@suse.com \
--cc=prarit@redhat.com \
--cc=rostedt@goodmis.org \
--cc=salyzyn@android.com \
--cc=sboyd@codeaurora.org \
--cc=sergey.senozhatsky@gmail.com \
--cc=tytso@mit.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®