linux-kernel - Re: [PATCH v5 3/4] x86/vmemmap: Handle unpopulated sub-pmd ranges

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Message-ID: <YElA+cMxS4NZHFAV@localhost.localdomain>
Date:   Wed, 10 Mar 2021 22:58:17 +0100
From:   Oscar Salvador <osalvador@...e.de>
To:     David Hildenbrand <david@...hat.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H . Peter Anvin" <hpa@...or.com>,
        Michal Hocko <mhocko@...nel.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 3/4] x86/vmemmap: Handle unpopulated sub-pmd ranges

On Wed, Mar 10, 2021 at 06:58:26PM +0100, David Hildenbrand wrote:
> Thinking again, I guess it might be a good idea to factor out the core
> functions into common code. For the optimization part, it might make sense
> too pass some "state" structure that contains e.g., "unused_pmd_start".

Yeah, that really sounds like a good thing to do.

> 
> Then we don't have diverging implementations of essentially the same thing.
> 
> Of course, we can do that on top of this series - unifying both
> implementations.

I would rather do it on top of this series, not because I am lazy, but
rather fairly busy and I will not be able to spend much time on it
anytime soon.

Once this series gets merged, I commit to have a look into that.

Thanks!


-- 
Oscar Salvador
SUSE L3