linux-kernel - Re: [PATCH v1 0/6] mm / virtio: Provide support for paravirtual waste page treatment

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Message-ID: <8fea71ba-2464-ead8-3802-2241805283cc@intel.com>
Date:   Tue, 25 Jun 2019 07:10:53 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     David Hildenbrand <david@...hat.com>,
        Alexander Duyck <alexander.duyck@...il.com>, nitesh@...hat.com,
        kvm@...r.kernel.org, mst@...hat.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, akpm@...ux-foundation.org
Cc:     yang.zhang.wz@...il.com, pagupta@...hat.com, riel@...riel.com,
        konrad.wilk@...cle.com, lcapitulino@...hat.com,
        wei.w.wang@...el.com, aarcange@...hat.com, pbonzini@...hat.com,
        dan.j.williams@...el.com, alexander.h.duyck@...ux.intel.com
Subject: Re: [PATCH v1 0/6] mm / virtio: Provide support for paravirtual waste
 page treatment

On 6/25/19 12:42 AM, David Hildenbrand wrote:
> On 20.06.19 00:32, Alexander Duyck wrote:
> I still *detest* the terminology, sorry. Can't you come up with a
> simpler terminology that makes more sense in the context of operating
> systems and pages we want to hint to the hypervisor? (that is the only
> use case you are using it for so far)

It's a wee bit too cute for my taste as well.  I could probably live
with it in the data structures, but having it show up out in places like
Kconfig and filenames goes too far.

For instance, someone seeing memory_aeration.c will have no concept
what's in the file.  Could we call it something like memory_paravirt.c?
 Or even mm/paravirt.c.

Could you talk for a minute about why the straightforward naming like
"hinted/unhinted" wasn't used?  Is there something else we could ever
use this infrastructure for that is not related to paravirtualized free
page hinting?