linux-kernel - Re: [PATCH v4 0/2] fix MADV_COLLAPSE issue if THP settings are disabled

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Message-ID: <37add58c-d395-b83a-fa1e-2d7ca799b4f0@google.com>
Date: Wed, 25 Jun 2025 20:49:27 -0700 (PDT)
From: Hugh Dickins <hughd@...gle.com>
To: David Hildenbrand <david@...hat.com>
cc: Usama Arif <usamaarif642@...il.com>, 
    Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, 
    Hugh Dickins <hughd@...gle.com>, 
    Baolin Wang <baolin.wang@...ux.alibaba.com>, akpm@...ux-foundation.org, 
    ziy@...dia.com, Liam.Howlett@...cle.com, npache@...hat.com, 
    ryan.roberts@....com, dev.jain@....com, baohua@...nel.org, 
    zokeefe@...gle.com, shy828301@...il.com, linux-mm@...ck.org, 
    linux-kernel@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH v4 0/2] fix MADV_COLLAPSE issue if THP settings are
 disabled

On Wed, 25 Jun 2025, David Hildenbrand wrote:
> On 25.06.25 13:03, Usama Arif wrote:
> > 
> > So I just wanted to throw another bad idea in the mix, what if we introduce
> > another sysfs file
> > (I hate introducing sysfs :)), something like /sys/kernel/mm/thp_allowed (or
> > some other alternate name)
> > which is default 1.
> 
> Let's rather not :)

:)

Thank you all, I've read through and agreed with much and pondered, I wish
wish wish I had something useful to add but do not, so shall just go quiet
again ...

... but there seems to be no need for rush to decide on any change at all.

Hugh