linux-kernel - Re: [PATCH v2] trace/hwlat: prevent false sharing in get

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Message-ID: <20260206095309.2fe4f4d3@gandalf.local.home>
Date: Fri, 6 Feb 2026 09:53:09 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: "Colin Lord" <clord@...olab.com>
Cc: <linux-kernel@...r.kernel.org>, <linux-trace-kernel@...r.kernel.org>,
 "Masami Hiramatsu" <mhiramat@...nel.org>, "Mathieu Desnoyers"
 <mathieu.desnoyers@...icios.com>
Subject: Re: [PATCH v2] trace/hwlat: prevent false sharing in get_sample()

On Fri, 06 Feb 2026 00:09:49 -0800
"Colin Lord" <clord@...olab.com> wrote:

> >   tracing: Fix get_sample() in hwlat from ...  
> 
> Got it, I can make that adjustment and resend. Would you also like me to
> modify the commit message with any of the above clarifications?

Yes please. Mention the cache sharing issues and that you saw
missed/duplicate seqnums too.

Not everyone knows what "false sharing" is (I forgot what it was ;). You
can use the term, but also explain it in terms of cache like you did in
this email.

Thanks,

-- Steve