linux-kernel - Re: [linus:master] [mm] c0bff412e6: stress-ng.clone.ops_per

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Message-ID: <99a5e8b5-6040-4de7-a185-7a39c16ae0fa@intel.com>
Date: Thu, 1 Aug 2024 15:44:13 +0800
From: "Yin, Fengwei" <fengwei.yin@...el.com>
To: David Hildenbrand <david@...hat.com>, kernel test robot
	<oliver.sang@...el.com>, Peter Xu <peterx@...hat.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>, Huacai Chen
	<chenhuacai@...nel.org>, Jason Gunthorpe <jgg@...dia.com>, Matthew Wilcox
	<willy@...radead.org>, Nathan Chancellor <nathan@...nel.org>, Ryan Roberts
	<ryan.roberts@....com>, WANG Xuerui <kernel@...0n.name>,
	<linux-mm@...ck.org>, <ying.huang@...el.com>, <feng.tang@...el.com>
Subject: Re: [linus:master] [mm] c0bff412e6: stress-ng.clone.ops_per_sec -2.9%
 regression

Hi David,

On 8/1/2024 2:49 PM, David Hildenbrand wrote:
> We now have to do a page_folio(page) and then test for hugetlb.
> 
>      return folio_test_hugetlb(page_folio(page));
> 
> Nowadays, folio_test_hugetlb() will be faster than at c0bff412e6 times, 
> so maybe at least part of the overhead is gone.
This is great. We will check the trend to know whether it's recovered
in some level.


Regards
Yin, Fengwei