linux-kernel - Re: [PATCH v2 4/7] platform/x86/intel/ifs: Implement Array BIST test

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Date:   Wed, 22 Feb 2023 17:36:54 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     "Joseph, Jithu" <jithu.joseph@...el.com>, hdegoede@...hat.com,
        markgross@...nel.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
        hpa@...or.com, gregkh@...uxfoundation.org, ashok.raj@...el.com,
        tony.luck@...el.com, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, patches@...ts.linux.dev,
        ravi.v.shankar@...el.com, thiago.macieira@...el.com,
        athenas.jimenez.gonzalez@...el.com, sohil.mehta@...el.com
Subject: Re: [PATCH v2 4/7] platform/x86/intel/ifs: Implement Array BIST
 test

On Wed, 22 Feb 2023 14:28:55 -0800
Dave Hansen <dave.hansen@...el.com> wrote:

> On 2/22/23 14:07, Joseph, Jithu wrote:
> > Since the trace has to be explicitly enabled (I thought it is okay to
> > add a more convenient custom one only to be enabled for detailed
> > analysis when required).  
> 
> 	man perf-script

Or do it in C with tracefs :-)

  https://www.trace-cmd.org/Documentation/libtracefs/

-- Steve


> 
> You should be able to write one to do exactly what you need in about 10
> minutes.  No new tracepoints, no new kernel code to maintain.  Knock
> yourself out with whatever conveniences you want.  Just do it in userspace.
> 
> I still think this patch should go away.