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

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Date: Thu, 23 May 2024 11:56:24 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Yuanyuan Zhong <yzhong@...estorage.com>
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, 23 May 2024 12:35:31 -0600 Yuanyuan Zhong <yzhong@...estorage.com> wrote:

> After switching smaps_rollup to use VMA iterator, searching for next
> entry is part of the condition expression of the do-while loop. So the
> current VMA needs to be addressed before the continue statement.

Please describe the userspace-visible runtime effects of this bug. 
This aids others in deciding which kernel version(s) need the patch.

Thanks.