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Bug#964036: marked as done (linux: Please set CONFIG_HWLAT_TRACER=y)

Your message dated Fri, 23 Apr 2021 13:17:30 +0200
with message-id <[🔎] YIKsyje2ETaO46v0@eldamar.lan>
and subject line Re: Bug#964036: linux: Please set CONFIG_HWLAT_TRACER=y
has caused the Debian Bug report #964036,
regarding linux: Please set CONFIG_HWLAT_TRACER=y
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
964036: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=964036
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Source: linux
Severity: wishlist

Dear Maintainer,

Setting CONFIG_HWLAT_TRACER=y enables a tracer to detect hardware latencies
with no overhead when not used. It is not designed to be run on a production
system, but is a useful tracer to use in embedded systems.

Other distros enable this configuration option, I see no security issues or
performance issues for users since this is by-default turned off so has to be
enabled at runtime.

Thanks,
Chris

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.7.0-1-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8),
LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

--- End Message ---
--- Begin Message --- 
Control: tags -1 + moreinfo

On Tue, Jun 30, 2020 at 08:52:26PM +0100, Christopher Obbard wrote:
> Source: linux
> Severity: wishlist
> 
> Dear Maintainer,
> 
> Setting CONFIG_HWLAT_TRACER=y enables a tracer to detect hardware latencies
> with no overhead when not used. It is not designed to be run on a production
> system, but is a useful tracer to use in embedded systems.
> 
> Other distros enable this configuration option, I see no security issues or
> performance issues for users since this is by-default turned off so has to be
> enabled at runtime.

This is enabled in the RT featureset enabled kernels, and from a
previous commit from Ben Hutchings:

commit 52e8d9f36fbe727523eef4950f0fa3afb25787cd
Author: Ben Hutchings <ben@decadent.org.uk>
Date:   Tue May 2 04:48:15 2017 +0100

    [rt] tracing: Enable HWLAT_TRACER

    This is in mainline but not that useful without PREEMPT_RT.
    HWLAT_DETECTOR no longer exists but I didn't notice because
    kconfigeditor2 only looks at the mainline Kconfig files.

So I guess we can close this bugreport.

Regards,
Salvatore

--- End Message ---
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