linux-kernel - Re: [PATCH v2 4/7] mm: rename mm_struct::map_count to vma

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Message-ID: <2t6asetuopq2wtj7cki6qf24i5j5slhi3palturmf62db2qddg@zfdbh6nivya5>
Date: Thu, 18 Sep 2025 12:46:34 +0100
From: Pedro Falcato <pfalcato@...e.de>
To: Kalesh Singh <kaleshsingh@...gle.com>
Cc: akpm@...ux-foundation.org, minchan@...nel.org, 
	lorenzo.stoakes@...cle.com, david@...hat.com, Liam.Howlett@...cle.com, rppt@...nel.org, 
	kernel-team@...roid.com, android-mm@...gle.com, Alexander Viro <viro@...iv.linux.org.uk>, 
	Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>, Kees Cook <kees@...nel.org>, 
	Vlastimil Babka <vbabka@...e.cz>, Suren Baghdasaryan <surenb@...gle.com>, 
	Michal Hocko <mhocko@...e.com>, Steven Rostedt <rostedt@...dmis.org>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, 
	Juri Lelli <juri.lelli@...hat.com>, Vincent Guittot <vincent.guittot@...aro.org>, 
	Dietmar Eggemann <dietmar.eggemann@....com>, Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>, 
	Valentin Schneider <vschneid@...hat.com>, Jann Horn <jannh@...gle.com>, Shuah Khan <shuah@...nel.org>, 
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, 
	linux-trace-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v2 4/7] mm: rename mm_struct::map_count to vma_count

On Mon, Sep 15, 2025 at 09:36:35AM -0700, Kalesh Singh wrote:
> A mechanical rename of the mm_struct->map_count field to
> vma_count; no functional change is intended.
> 
> The name "map_count" is ambiguous within the memory management subsystem,
> as it can be confused with the folio/page->_mapcount field, which tracks
> PTE references.
> 
> The new name, vma_count, is more precise as this field has always
> counted the number of vm_area_structs associated with an mm_struct.
> 
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: David Hildenbrand <david@...hat.com>
> Cc: "Liam R. Howlett" <Liam.Howlett@...cle.com>
> Cc: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
> Cc: Mike Rapoport <rppt@...nel.org>
> Cc: Minchan Kim <minchan@...nel.org>
> Cc: Pedro Falcato <pfalcato@...e.de>
> Signed-off-by: Kalesh Singh <kaleshsingh@...gle.com>

Reviewed-by: Pedro Falcato <pfalcato@...e.de>

-- 
Pedro