linux-kernel - Re: [PATCH 2/2] mm: mmap: map MAP_STACK to VM

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Message-Id: <20240116133159.f92cbfebd792d85a498c23fa@linux-foundation.org>
Date: Tue, 16 Jan 2024 13:31:59 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Yang Shi <shy828301@...il.com>
Cc: "Zach O'Keefe" <zokeefe@...gle.com>, Yin Fengwei
 <fengwei.yin@...el.com>, oliver.sang@...el.com, riel@...riel.com,
 willy@...radead.org, cl@...ux.com, ying.huang@...el.com,
 linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 2/2] mm: mmap: map MAP_STACK to VM_NOHUGEPAGE

On Tue, 16 Jan 2024 12:57:41 -0800 Yang Shi <shy828301@...il.com> wrote:

> > Should this be marked for stable? Given how easily it is for pthreads
> > to allocate hugepages w/o this change, it can easily cause memory
> > bloat on larger systems and/or users with high thread counts. I don't
> > think that will be welcomed, and seems odd that just 6.7 should suffer
> > this.
> 
> Thanks for the suggestion, fine to me.
>

Thanks, added, along with

Fixes: efa7df3e3bb5 ("mm: align larger anonymous mappings on THP boundaries")