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    SubjectRe: [RFC][PATCH] proc: export more page flags in /proc/kpageflags
    > That's pretty good separations. I guess it would be convenient to make the
    > extra kernel flags available under CONFIG_DEBUG_KERNEL?

    Yes.

    BTW an alternative would be just someone implementing a suitable
    command/macro in crash(1) and tell the kernel hackers to run that on
    /proc/kcore. That would have the advantage to not require code.

    > > > > > > - PG_compound
    > >
    > > I would combine these three into a pseudo "large page" flag.
    >
    > Very neat idea! Patch updated accordingly.
    >
    > However - one pity I observed:
    >
    > # ./page-areas 0x008000
    > offset len KB
    > 3088 4 16KB
    >
    > We can no longer tell if the above line means one 4-page hugepage, or two
    > 2-page hugepages... Adding PG_COMPOUND_TAIL into the CONFIG_DEBUG_KERNEL block

    There's only a single size (2 or 4MB), at worst two.

    > >
    > > PG_poison is also useful to export. But since it depends on my
    > > patchkit I will pull a patch for that into the HWPOISON series.
    >
    > That's not a problem - since the PG_poison line is be protected by
    > #ifdef CONFIG_MEMORY_FAILURE :-)

    Good point. I added a patch to only add it to my pile,
    but I can drop that again.

    -Andi


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