linux-kernel - Re: [PATCH 1/2] [PATCH 1/2] mm: refactor of vma

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Message-Id: <20220602111341.6674e4d862d6d925b0eebcb3@linux-foundation.org>
Date:   Thu, 2 Jun 2022 11:13:41 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Jakub Matěna <matenajakub@...il.com>
Cc:     linux-mm@...ck.org, patches@...ts.linux.dev,
        linux-kernel@...r.kernel.org, vbabka@...e.cz, mhocko@...nel.org,
        mgorman@...hsingularity.net, willy@...radead.org,
        liam.howlett@...cle.com, hughd@...gle.com, kirill@...temov.name,
        riel@...riel.com, rostedt@...dmis.org, peterz@...radead.org
Subject: Re: [PATCH 1/2] [PATCH 1/2] mm: refactor of vma_merge()

On Thu,  2 Jun 2022 16:56:41 +0200 Jakub Matěna <matenajakub@...il.com> wrote:

> Refactor vma_merge() to make it shorter and more understandable.
> Main change is the elimination of code duplicity in the case of
> merge next check. This is done by first doing checks and caching
> the results before executing the merge itself. The variable 'area' is
> divided into 'mid' and 'res' as previously it was used for two purposes,
> as the middle VMA between prev and next and also as the result of the
> merge itself. Exit paths are also unified.
> 

Thanks, but unfortunately the code you're working on here has changed
greatly in Liam's mapletree patchset.  Could you please take a look at
the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and decide if you
want to tackle it?