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

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Message-ID: <CA+CK2bCFNPpzKr8wfpTwFAMnO-e5-AbC4siU4b+ESu2GVeMuyw@mail.gmail.com>
Date: Mon, 18 Nov 2024 15:43:09 -0500
From: Pasha Tatashin <pasha.tatashin@...een.com>
To: Jonathan Corbet <corbet@....net>
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Subject: Re: [RFCv1 4/6] misc/page_detective: Introduce Page Detective

On Sat, Nov 16, 2024 at 5:20 PM Jonathan Corbet <corbet@....net> wrote:
>
> 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...?

I will put it under MM docs in the next version, as I will also
convert Page Detective to be part of core mm.

Thank you,
Pasha