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Date:   Thu, 26 Nov 2020 06:52:45 +0100
From:   Greg KH <>
To:     "J. Avila" <>
Subject: Re: Potential Issue in Tracing Ring Buffer

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:

resolve this issue for you?


greg kh-

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