linux-kernel - Re: [PATCH v4 13/13] mm/gup: Handle hugetlb in the generic follow_page

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Date: Tue, 2 Apr 2024 13:58:12 -0400
From: Peter Xu <peterx@...hat.com>
To: Ryan Roberts <ryan.roberts@....com>
Cc: David Hildenbrand <david@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Yang Shi <shy828301@...il.com>,
	"Kirill A . Shutemov" <kirill@...temov.name>,
	Mike Kravetz <mike.kravetz@...cle.com>,
	John Hubbard <jhubbard@...dia.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Andrew Jones <andrew.jones@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>,
	linux-riscv@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	Lorenzo Stoakes <lstoakes@...il.com>,
	Matthew Wilcox <willy@...radead.org>,
	Rik van Riel <riel@...riel.com>,
	linux-arm-kernel@...ts.infradead.org,
	Andrea Arcangeli <aarcange@...hat.com>,
	"Aneesh Kumar K . V" <aneesh.kumar@...nel.org>,
	Vlastimil Babka <vbabka@...e.cz>,
	James Houghton <jthoughton@...gle.com>,
	Jason Gunthorpe <jgg@...dia.com>, Mike Rapoport <rppt@...nel.org>,
	Axel Rasmussen <axelrasmussen@...gle.com>
Subject: Re: [PATCH v4 13/13] mm/gup: Handle hugetlb in the generic
 follow_page_mask code

On Tue, Apr 02, 2024 at 05:46:57PM +0100, Ryan Roberts wrote:
> I'll leave you to do the testing on this, if that's ok.

Definitely.  I'll test and send formal patches.

> 
> Just to make my config explicit, I have this kernel command line, which reserves
> hugetlbs of all sizes for the tests:
> 
> "transparent_hugepage=madvise earlycon root=/dev/vda2 secretmem.enable
> hugepagesz=1G hugepages=0:2,1:2 hugepagesz=32M hugepages=0:2,1:2
> default_hugepagesz=2M hugepages=0:64,1:64 hugepagesz=64K hugepages=0:2,1:2"

This helps, thanks.

-- 
Peter Xu