linux-kernel - Re: [PATCH] mm/huge_memory: add TRANSPARENT_HUGEPAGE

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Message-ID: <4a78abbc-4c07-2208-1072-af6d342c3f1a@google.com>
Date:   Fri, 2 Dec 2022 09:57:19 -0800 (PST)
From:   David Rientjes <rientjes@...gle.com>
To:     Matthew Wilcox <willy@...radead.org>
cc:     ye.xingchen@....com.cn, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/huge_memory: add TRANSPARENT_HUGEPAGE_NEVER for THP

On Thu, 1 Dec 2022, Matthew Wilcox wrote:

> On Wed, Nov 30, 2022 at 04:51:46PM +0800, ye.xingchen@....com.cn wrote:
> > From: ye xingchen <ye.xingchen@....com.cn>
> > 
> > Sometimes we may need the /sys/kernel/mm/transparent_hugepage/enabled to
> > default as [never] at the first time.
> 
> What is going wrong with THP enabled that you need to disable it?
> 

That would be useful to know in addition to why this needs to be part of 
.config and not simply using the kernel command line option.