Re: [PATCH v2 0/9] Add support for shared PTEs across processes

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To: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
Subject: Re: [PATCH v2 0/9] Add support for shared PTEs across processes
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 1 Jul 2022 21:24:03 -0700
Cc: willy@xxxxxxxxxxxxx, aneesh.kumar@xxxxxxxxxxxxx, arnd@xxxxxxxx, 21cnbao@xxxxxxxxx, corbet@xxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, david@xxxxxxxxxx, ebiederm@xxxxxxxxxxxx, hagen@xxxxxxxx, jack@xxxxxxx, keescook@xxxxxxxxxxxx, kirill@xxxxxxxxxxxxx, kucharsk@xxxxxxxxx, linkinjeon@xxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, longpeng2@xxxxxxxxxx, luto@xxxxxxxxxx, markhemm@xxxxxxxxxxxxxx, pcc@xxxxxxxxxx, rppt@xxxxxxxxxx, sieberf@xxxxxxxxxx, sjpark@xxxxxxxxx, surenb@xxxxxxxxxx, tst@xxxxxxxxxxxxxxxxxx, yzaikin@xxxxxxxxxx
In-reply-to: <cover.1656531090.git.khalid.aziz@oracle.com>
References: <cover.1656531090.git.khalid.aziz@oracle.com>

On Wed, 29 Jun 2022 16:53:51 -0600 Khalid Aziz <khalid.aziz@xxxxxxxxxx> wrote:

> This patch series implements a mechanism in kernel to allow
> userspace processes to opt into sharing PTEs. It adds a new
> in-memory filesystem - msharefs. 

Dumb question: why do we need a new filesystem for this?  Is it not
feasible to permit PTE sharing for mmaps of tmpfs/xfs/ext4/etc files?

Follow-Ups:
- Re: [PATCH v2 0/9] Add support for shared PTEs across processes
  - From: David Hildenbrand
- Re: [PATCH v2 0/9] Add support for shared PTEs across processes
  - From: Khalid Aziz

References:
- [PATCH v2 0/9] Add support for shared PTEs across processes
  - From: Khalid Aziz

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