linux-kernel - Re: [PATCH v2 03/14] arm64, hibernate: add trans

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Date:   Tue, 20 Aug 2019 07:41:55 -0400
From:   Pavel Tatashin <pasha.tatashin@...een.com>
To:     Mark Rutland <mark.rutland@....com>
Cc:     James Morris <jmorris@...ei.org>, Sasha Levin <sashal@...nel.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        kexec mailing list <kexec@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        Catalin Marinas <catalin.marinas@....com>, will@...nel.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Marc Zyngier <marc.zyngier@....com>,
        James Morse <james.morse@....com>,
        Vladimir Murzin <vladimir.murzin@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Bhupesh Sharma <bhsharma@...hat.com>,
        linux-mm <linux-mm@...ck.org>
Subject: Re: [PATCH v2 03/14] arm64, hibernate: add trans_table public functions

> > > While the architecture uses the term 'translation table', in the kernel
> > > we generally use 'pgdir' or 'pgd' to refer to the tables, so please keep
> > > to that naming scheme.
> >
> > The idea is to have a unique name space for new subsystem of page
> > tables that are used between kernels:
> > between stage 1 and stage 2 kexec kernel, and similarly between
> > kernels during hibernate boot process.
> >
> > I picked: "trans_table" that stands for transitional page table:
> > meaning they are used only during transition between worlds.
> >
> > All public functions in this subsystem will have trans_table_* prefix,
> > and page directory will be named: "trans_table". If this is confusing,
> > I can either use a different prefix, or describe what "trans_table"
> > stand for in trans_table.h/.c
>
> Ok.
>
> I think that "trans_table" is unfortunately confusing, as it clashes
> with the architecture terminology, and differs from what we have
> elsewhere.
>
> I think that "trans_pgd" would be better, as that better aligns with
> what we have elsewhere, and avoids the ambiguity.
>

Sounds good. I will rename trans_table* with trans_pgd*, and will also
add a note to the comments explaining what it stands for.

Thank you,
Pasha