linux-kernel - Re: [PATCH v2 3/7] mm: move vma_shrink(), vma

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Message-ID: <yp2uorqma3gyt2uwfjmjcifhqgslit3c4x32662sba4spn5y2e@iya75ryl2eek>
Date: Tue, 9 Jul 2024 09:09:54 -0400
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Vlastimil Babka <vbabka@...e.cz>, Matthew Wilcox <willy@...radead.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
        Eric Biederman <ebiederm@...ssion.com>, Kees Cook <kees@...nel.org>,
        Suren Baghdasaryan <surenb@...gle.com>, SeongJae Park <sj@...nel.org>,
        Shuah Khan <shuah@...nel.org>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        David Gow <davidgow@...gle.com>, Rae Moar <rmoar@...gle.com>
Subject: Re: [PATCH v2 3/7] mm: move vma_shrink(), vma_expand() to internal
 header

* Lorenzo Stoakes <lorenzo.stoakes@...cle.com> [240704 15:28]:
> The vma_shrink() and vma_expand() functions are internal VMA manipulation
> functions which we ought to abstract for use outside of memory management
> code.
> 
> To achieve this, we replace shift_arg_pages() in fs/exec.c with an
> invocation of a new relocate_vma_down() function implemented in mm/mmap.c,
> which enables us to also move move_page_tables() and vma_iter_prev_range()
> to internal.h.
> 
> The purpose of doing this is to isolate key VMA manipulation functions in
> order that we can both abstract them and later render them easily testable.
> 
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>

Reviewed-by: Liam R. Howlett <Liam.Howlett@...cle.com>