linux-kernel - Re: [RFC PATCH 05/12] fs/proc/task_mmu: refactor pagemap_pmd

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Message-ID: <6bd01af0-c4c1-4988-a80a-f0b40388d083@lucifer.local>
Date: Mon, 27 Oct 2025 15:26:18 +0000
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Gregory Price <gourry@...rry.net>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
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        Sven Schnelle <svens@...ux.ibm.com>, Zi Yan <ziy@...dia.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
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Subject: Re: [RFC PATCH 05/12] fs/proc/task_mmu: refactor pagemap_pmd_range()

On Fri, Oct 24, 2025 at 04:37:18PM -0400, Gregory Price wrote:
> On Fri, Oct 24, 2025 at 09:15:59PM +0100, Lorenzo Stoakes wrote:
> > On Fri, Oct 24, 2025 at 03:12:08PM -0400, Gregory Price wrote:
> >
> > So maybe actually that isn't too bad of an idea...
> >
> > Could also be
> >
> > nonpresent_or_swap_t but that's kinda icky...
>
> clearly we need:
>
> union {
> 	swp_entry_t swap;
> 	nonpresent_entry_t np;
> 	pony_entry_t pony;
> 	plum_emtry_t beer;
> } leaf_entry_t;
>
> with
>
> leaf_type whats_that_pte(leaf_entry_t);
>
> with 20 more new functions about how to manage leaf_entries ;]

:))))

Hm well the union is an amusing thought but more seriously leaf_entry_t
seems pretty good name-wise actually :)

>
> no not seriously, please have a good weekend!

Thanks :) Hope you had a good one too!

>
> and thanks again for doing this!

Thanks again :)

> ~Gregory

Cheers, Lorenzo