From: Mike Rapoport <rppt@kernel.org>
To: Muchun Song <songmuchun@bytedance.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <djbw@kernel.org>,
David Hildenbrand <david@kernel.org>,
linux-mm@kvack.org, nvdimm@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-cxl@vger.kernel.org,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Alison Schofield <alison.schofield@intel.com>,
Oscar Salvador <osalvador@suse.de>, Ira Weiny <iweiny@kernel.org>,
Jan Kara <jack@suse.cz>, Matthew Wilcox <willy@infradead.org>,
Lorenzo Stoakes <ljs@kernel.org>,
Vlastimil Babka <vbabka@kernel.org>,
Michal Hocko <mhocko@suse.com>, Qi Zheng <qi.zheng@linux.dev>,
muchun.song@linux.dev
Subject: Re: [PATCH 1/4] mm: generalize vmemmap remap architecture support
Date: Thu, 29 Oct 2026 09:03:39 +0200 [thread overview]
Message-ID: <auLvy-8djFBRadho@kernel.org> (raw)
In-Reply-To: <20260903122128.12264-2-songmuchun@bytedance.com>
On Thu, Sep 03, 2026 at 08:21:24PM +0800, Muchun Song wrote:
> ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP is named after its first user, but
> the underlying requirement is not HugeTLB-specific. Generic MM only needs
> to know whether an architecture can safely remap populated vmemmap PTEs at
> run time.
>
> Rename the architecture opt-in to ARCH_SUPPORTS_VMEMMAP_REMAP and make
> HugeTLB vmemmap optimization depend on that generic capability. This also
> prepares for FS-DAX vmemmap optimization, which relies on the same runtime
> remap support.
>
> Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> ---
> arch/loongarch/Kconfig | 2 +-
> arch/riscv/Kconfig | 2 +-
> arch/x86/Kconfig | 2 +-
> fs/Kconfig | 2 +-
> mm/Kconfig | 6 ++++--
> 5 files changed, 8 insertions(+), 6 deletions(-)
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2026-10-29 7:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-03 12:21 [PATCH 0/4] mm: Reduce struct page overhead for FS-DAX pmem Muchun Song
2026-09-03 12:21 ` [PATCH 1/4] mm: generalize vmemmap remap architecture support Muchun Song
2026-09-21 12:25 ` Oscar Salvador (SUSE)
2026-10-29 7:03 ` Mike Rapoport [this message]
2026-09-03 12:21 ` [PATCH 2/4] nvdimm/pmem: avoid HWPoison flag updates for clean pages Muchun Song
2026-09-03 12:41 ` sashiko-bot
2026-09-21 7:33 ` Gupta, Pankaj
2026-09-21 12:53 ` Oscar Salvador (SUSE)
2026-09-22 2:33 ` Muchun Song
2026-09-03 12:21 ` [PATCH 3/4] mm: add shared read-only vmemmap support for FS-DAX Muchun Song
2026-09-21 6:42 ` Gupta, Pankaj
2026-09-21 9:33 ` Muchun Song
2026-09-21 11:05 ` Gupta, Pankaj
2026-09-21 13:09 ` Oscar Salvador (SUSE)
2026-09-22 3:17 ` Muchun Song
2026-10-27 6:57 ` Yilei Zheng
2026-10-28 9:15 ` Muchun Song
2026-10-29 3:05 ` Yilei Zheng
2026-10-29 5:35 ` Muchun Song
2026-10-29 6:45 ` Yilei Zheng
2026-10-29 7:12 ` Yilei Zheng
2026-10-29 7:31 ` Muchun Song
2026-09-03 12:21 ` [PATCH 4/4] fsdax: materialize pmem vmemmap metadata on faults Muchun Song
2026-09-03 12:53 ` sashiko-bot
2026-09-05 3:26 ` Muchun Song
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