From: Zi Yan <ziy@nvidia.com>
To: Kiryl Shutsemau <kas@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Muchun Song <muchun.song@linux.dev>,
David Hildenbrand <david@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
Usama Arif <usamaarif642@gmail.com>,
Frank van der Linden <fvdl@google.com>,
Oscar Salvador <osalvador@suse.de>,
Mike Rapoport <rppt@kernel.org>, Vlastimil Babka <vbabka@suse.cz>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Baoquan He <bhe@redhat.com>, Michal Hocko <mhocko@suse.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Jonathan Corbet <corbet@lwn.net>,
kernel-team@meta.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
Subject: Re: [PATCHv4 06/14] mm: Make page_zonenum() use head page
Date: Wed, 21 Jan 2026 11:28:48 -0500 [thread overview]
Message-ID: <05053F70-2885-494D-91E6-C447EC1A1676@nvidia.com> (raw)
In-Reply-To: <20260121162253.2216580-7-kas@kernel.org>
On 21 Jan 2026, at 11:22, Kiryl Shutsemau wrote:
> With the upcoming changes to HVO, a single page of tail struct pages
> will be shared across all huge pages of the same order on a node. Since
> huge pages on the same node may belong to different zones, the zone
> information stored in shared tail page flags would be incorrect.
>
> Always fetch zone information from the head page, which has unique and
> correct zone flags for each compound page.
>
> Signed-off-by: Kiryl Shutsemau <kas@kernel.org>
> ---
> include/linux/mmzone.h | 1 +
> 1 file changed, 1 insertion(+)
>
Make sense.
Acked-by: Zi Yan <ziy@nvidia.com>
Best Regards,
Yan, Zi
next prev parent reply other threads:[~2026-01-21 16:29 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-21 16:22 [PATCHv4 00/14] mm: Eliminate fake head pages from vmemmap optimization Kiryl Shutsemau
2026-01-21 16:22 ` [PATCHv4 01/14] mm: Move MAX_FOLIO_ORDER definition to mmzone.h Kiryl Shutsemau
2026-01-21 16:29 ` Zi Yan
2026-01-22 2:24 ` Muchun Song
2026-01-21 16:22 ` [PATCHv4 02/14] mm: Change the interface of prep_compound_tail() Kiryl Shutsemau
2026-01-21 16:32 ` Zi Yan
2026-01-21 16:22 ` [PATCHv4 03/14] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info' Kiryl Shutsemau
2026-01-21 16:34 ` Zi Yan
2026-01-21 16:22 ` [PATCHv4 04/14] mm: Move set/clear_compound_head() next to compound_head() Kiryl Shutsemau
2026-01-21 16:35 ` Zi Yan
2026-01-21 16:22 ` [PATCHv4 05/14] mm: Rework compound_head() for power-of-2 sizeof(struct page) Kiryl Shutsemau
2026-01-21 17:12 ` Zi Yan
2026-01-22 11:29 ` Kiryl Shutsemau
2026-01-22 11:52 ` Muchun Song
2026-01-21 16:22 ` [PATCHv4 06/14] mm: Make page_zonenum() use head page Kiryl Shutsemau
2026-01-21 16:28 ` Zi Yan [this message]
2026-01-21 16:22 ` [PATCHv4 07/14] mm/sparse: Check memmap alignment for compound_info_has_mask() Kiryl Shutsemau
2026-01-21 17:58 ` Zi Yan
2026-01-22 11:22 ` Kiryl Shutsemau
2026-01-22 3:10 ` Muchun Song
2026-01-22 11:28 ` Kiryl Shutsemau
2026-01-22 11:33 ` Muchun Song
2026-01-22 11:42 ` Muchun Song
2026-01-22 12:42 ` Kiryl Shutsemau
2026-01-22 14:02 ` Muchun Song
2026-01-22 17:59 ` Kiryl Shutsemau
2026-01-23 2:32 ` Muchun Song
2026-01-23 12:07 ` Kiryl Shutsemau
2026-01-21 16:22 ` [PATCHv4 08/14] mm/hugetlb: Refactor code around vmemmap_walk Kiryl Shutsemau
2026-01-22 8:08 ` Muchun Song
2026-01-21 16:22 ` [PATCHv4 09/14] mm/hugetlb: Remove fake head pages Kiryl Shutsemau
2026-01-22 7:00 ` Muchun Song
2026-01-27 14:51 ` Kiryl Shutsemau
2026-01-28 2:43 ` Muchun Song
2026-01-28 12:59 ` Kiryl Shutsemau
2026-01-29 3:04 ` Muchun Song
2026-01-21 16:22 ` [PATCHv4 10/14] mm: Drop fake head checks Kiryl Shutsemau
2026-01-21 18:16 ` Zi Yan
2026-01-22 12:48 ` Kiryl Shutsemau
2026-01-21 16:22 ` [PATCHv4 11/14] hugetlb: Remove VMEMMAP_SYNCHRONIZE_RCU Kiryl Shutsemau
2026-01-21 16:22 ` [PATCHv4 12/14] mm/hugetlb: Remove hugetlb_optimize_vmemmap_key static key Kiryl Shutsemau
2026-01-21 16:22 ` [PATCHv4 13/14] mm: Remove the branch from compound_head() Kiryl Shutsemau
2026-01-21 18:21 ` Zi Yan
2026-01-21 16:22 ` [PATCHv4 14/14] hugetlb: Update vmemmap_dedup.rst Kiryl Shutsemau
2026-01-22 2:22 ` Muchun Song
2026-01-21 18:44 ` [PATCHv4 00/14] mm: Eliminate fake head pages from vmemmap optimization Vlastimil Babka
2026-01-21 20:31 ` Zi Yan
2026-01-22 11:21 ` Kiryl Shutsemau
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