linux-kernel - RE: Re: [PATCH] mm/hugetlb: two-phase hugepage allocation when reservation is high

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Message-ID: <5516a0e446294c158492c410100f4bc9@baidu.com>
Date: Mon, 25 Aug 2025 02:27:58 +0000
From: "Li,Rongqing" <lirongqing@...du.com>
To: Giorgi Tchankvetadze <giorgitchankvetadze1997@...il.com>
CC: "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"david@...hat.com" <david@...hat.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>,
	"muchun.song@...ux.dev" <muchun.song@...ux.dev>, "osalvador@...e.de"
	<osalvador@...e.de>, "Xu,Wenjie(ACG CCN)" <xuwenjie04@...du.com>
Subject: RE:  Re: [PATCH] mm/hugetlb: two-phase hugepage allocation when
 reservation is high

> 
> Hi there. The 90% split is solid. Would it make sense to (a) log a one-time
> warning if the second pass is triggered, so operators know why boot slowed,

Ok

> and (b) make the 90% cap a Kconfig default ratio, so distros can lower it
> without patching? Both are low-risk and don’t change the ABI
>

I think it is better to add a cmdline option

-Li