Re: [PATCH v3 06/22] mm/mshare: Add a vma flag to indicate an mshare region

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To: Anthony Yznaga <anthony.yznaga@xxxxxxxxxx>, linux-mm@xxxxxxxxx
Subject: Re: [PATCH v3 06/22] mm/mshare: Add a vma flag to indicate an mshare region
From: David Hildenbrand <david@xxxxxxxxxx>
Date: Mon, 8 Sep 2025 20:45:28 +0200
Cc: akpm@xxxxxxxxxxxxxxxxxxxx, andreyknvl@xxxxxxxxx, arnd@xxxxxxxx, bp@xxxxxxxxx, brauner@xxxxxxxxxx, bsegall@xxxxxxxxxx, corbet@xxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, dietmar.eggemann@xxxxxxx, ebiederm@xxxxxxxxxxxx, hpa@xxxxxxxxx, jakub.wartak@xxxxxxxxxxx, jannh@xxxxxxxxxx, juri.lelli@xxxxxxxxxx, khalid@xxxxxxxxxx, liam.howlett@xxxxxxxxxx, linyongting@xxxxxxxxxxxxx, lorenzo.stoakes@xxxxxxxxxx, luto@xxxxxxxxxx, markhemm@xxxxxxxxxxxxxx, maz@xxxxxxxxxx, mhiramat@xxxxxxxxxx, mgorman@xxxxxxx, mhocko@xxxxxxxx, mingo@xxxxxxxxxx, muchun.song@xxxxxxxxx, neilb@xxxxxxx, osalvador@xxxxxxx, pcc@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, pfalcato@xxxxxxx, rostedt@xxxxxxxxxxx, rppt@xxxxxxxxxx, shakeel.butt@xxxxxxxxx, surenb@xxxxxxxxxx, tglx@xxxxxxxxxxxxx, vasily.averin@xxxxxxxxx, vbabka@xxxxxxx, vincent.guittot@xxxxxxxxxx, viro@xxxxxxxxxxxxxxxxxx, vschneid@xxxxxxxxxx, willy@xxxxxxxxxxxxx, x86@xxxxxxxxxx, xhao@xxxxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx
In-reply-to: <20250820010415.699353-7-anthony.yznaga@oracle.com>
References: <20250820010415.699353-1-anthony.yznaga@oracle.com> <20250820010415.699353-7-anthony.yznaga@oracle.com>
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On 20.08.25 03:03, Anthony Yznaga wrote:

From: Khalid Aziz <khalid@xxxxxxxxxx>

An mshare region contains zero or more actual vmas that map objects
in the mshare range with shared page tables.

Signed-off-by: Khalid Aziz <khalid@xxxxxxxxxx>
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Anthony Yznaga <anthony.yznaga@xxxxxxxxxx>
---


Why can't we query the mapping instead?

--
Cheers

David / dhildenb

Follow-Ups:
- Re: [PATCH v3 06/22] mm/mshare: Add a vma flag to indicate an mshare region
  - From: Anthony Yznaga

References:
- [PATCH v3 00/22] Add support for shared PTEs across processes
  - From: Anthony Yznaga
- [PATCH v3 06/22] mm/mshare: Add a vma flag to indicate an mshare region
  - From: Anthony Yznaga

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