linux-kernel - Re: [PATCH] mm: /proc/pid/smaps_rollup: avoid skipping vma after getting mmap

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Message-ID: <CA+AMecHUo-sPy5wDszWgX5BWPAqMwrXqCWO1jGE5uMRq2U=BVw@mail.gmail.com>
Date: Thu, 23 May 2024 12:16:57 -0700
From: Yuanyuan Zhong <yzhong@...estorage.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: David Hildenbrand <david@...hat.com>, Matthew Wilcox <willy@...radead.org>, linux-kernel@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, Mohamed Khalfella <mkhalfella@...estorage.com>
Subject: Re: [PATCH] mm: /proc/pid/smaps_rollup: avoid skipping vma after
 getting mmap_lock again

On Thu, May 23, 2024 at 11:56 AM Andrew Morton
<akpm@...ux-foundation.org> wrote:
>
> Please describe the userspace-visible runtime effects of this bug.
> This aids others in deciding which kernel version(s) need the patch.
>
Otherwise, with some VMAs skipped, userspace observed memory consumption
from /proc/pid/smaps_rollup will be smaller than the sum of the
corresponding fields from /proc/pid/smaps.

Please let me know if separate v2 is needed. Thanks