linux-kernel - Re: [PATCH] Revert "hugetlb: make hugetlb depends on SYSFS or SYSCTL"

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Message-Id: <20250826203552.b4340b12b16a374396f49343@linux-foundation.org>
Date: Tue, 26 Aug 2025 20:35:52 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Miaohe Lin <linmiaohe@...wei.com>
Cc: <muchun.song@...ux.dev>, <osalvador@...e.de>, <david@...hat.com>,
 <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Revert
 "hugetlb: make hugetlb depends on SYSFS or SYSCTL"

On Tue, 26 Aug 2025 11:09:55 +0800 Miaohe Lin <linmiaohe@...wei.com> wrote:

> Commit f8142cf94d47 ("hugetlb: make hugetlb depends on SYSFS or SYSCTL")
> added dependency on SYSFS or SYSCTL but hugetlb can be used without SYSFS
> or SYSCTL. So this dependency is wrong and should be removed.
> 
> This reverts commit f8142cf94d4737ea0c3baffb3b9bad8addcb9b6b.

f8142cf94d47 said:

    If CONFIG_SYSFS and CONFIG_SYSCTL are both undefined, hugetlb
    doesn't work now as there's no way to set max huge pages.  Make
    sure at least one of the above configs is defined to make hugetlb
    works as expected.

So there is now a way to set max huge pages?  A reference tot he
commit which made f8142cf94d47 unneeded might be helpful?