linux-kernel - Re: [RFCv1 4/6] misc/page_detective: Introduce Page Detective

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Message-ID: <87cyiukehs.fsf@trenco.lwn.net>
Date: Sat, 16 Nov 2024 15:20:15 -0700
From: Jonathan Corbet <corbet@....net>
To: Pasha Tatashin <pasha.tatashin@...een.com>, pasha.tatashin@...een.com,
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Subject: Re: [RFCv1 4/6] misc/page_detective: Introduce Page Detective

Pasha Tatashin <pasha.tatashin@...een.com> writes:

> Page Detective is a kernel debugging tool that provides detailed
> information about the usage and mapping of physical memory pages.
>
> It operates through the Linux debugfs interface, providing access
> to both virtual and physical address inquiries. The output, presented
> via kernel log messages (accessible with dmesg), will help
> administrators and developers understand how specific pages are
> utilized by the system.
>
> This tool can be used to investigate various memory-related issues,
> such as checksum failures during live migration, filesystem journal
> failures, general segfaults, or other corruptions.
>
> Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>
> ---
>  Documentation/misc-devices/index.rst          |   1 +
>  Documentation/misc-devices/page_detective.rst |  78 ++

This seems like a strange place to bury this document - who will look
for it here?  Even if it is truly implemented as a misc device (I didn't
look), the documentation would belong either in the admin guide or with
the MM docs, it seems to me...?

Thanks,

jon