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From: Greg KH <gregkh@linuxfoundation.org>
To: "J. Avila" <elavila@google.com>
Cc: rostedt@goodmis.org, mingo@redhat.com, john.stultz@linaro.org,
	linux-kernel@vger.kernel.org, kernel-team@android.com
Subject: Re: Potential Issue in Tracing Ring Buffer
Date: Thu, 26 Nov 2020 06:52:45 +0100	[thread overview]
Message-ID: <X79CrSX1rnpnbqPd@kroah.com> (raw)
In-Reply-To: <20201124223917.795844-1-elavila@google.com>

On Tue, Nov 24, 2020 at 10:39:17PM +0000, J. Avila wrote:
> Hello,
> 
> In the ftrace logs we've collected internally, we have found that there are
> situations where time seems to go backwards; this breaks userspace tools which
> expect time to always go forward in these logs. For example, in this snippet
> from a db845c running a 5.10-rc4 kernel[1] (thanks for getting us the trace,
> John!), we see:

Does the patch at:
	https://lore.kernel.org/r/20201125225654.1618966-1-minchan@kernel.org

resolve this issue for you?

thanks,

greg kh-

  parent reply	other threads:[~2020-11-26  5:58 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-24 22:39 Potential Issue in Tracing Ring Buffer J. Avila
2020-11-25  0:56 ` Steven Rostedt
2020-11-26  5:52 ` Greg KH [this message]
2020-11-26 18:26   ` Steven Rostedt
2020-11-30 14:48     ` Steven Rostedt
2020-11-30 18:13       ` William Mcvicker
2020-12-08 19:37         ` J. Avila
2020-12-08 20:00           ` Steven Rostedt

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