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b=GtSBY9jioJZOYjv99tRc0FiQ2/d+P6gJIYgpG61yl1vGps8M7mGNuQJjjXZ7eup3p HKxlT0MN7/G+PCl3o6ewuu+IqohhlCD5Qn/AtGiLYHgtJ/4b3M24GlEvWp3Rq3gH7H qEAznsBN6hj6Mz9TQa0F12tGhWK52if4nyxMcB9Y= Date: Wed, 1 Oct 2025 13:31:55 -0700 From: Andrew Morton To: David Hildenbrand Cc: Wei Yang , lorenzo.stoakes@oracle.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, Liam.Howlett@oracle.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, linux-mm@kvack.org Subject: Re: [PATCH] mm/huge_memory: add pmd folio to ds_queue in do_huge_zero_wp_pmd() Message-Id: <20251001133155.e0fa0553030055f8745a6991@linux-foundation.org> In-Reply-To: <660dc0e8-a23a-4cc8-a9df-bef07b2322da@redhat.com> References: <20251001142823.4050-1-richard.weiyang@gmail.com> <660dc0e8-a23a-4cc8-a9df-bef07b2322da@redhat.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 6BD1980011 X-Stat-Signature: y8igmtnbmimznf4nbpcyhqbs7zizefgn X-HE-Tag: 1759350718-466848 X-HE-Meta: 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 qhz/gy31 6aJ0n0KYrPwnBHtAgMBUvrptj3s4GfKIXYsLvs9j/+C9Ms2jKRit1Tm+rqDs6VgPNsbW5x2fkrX3Tj+CgruoEGsgf5T8eUS+sdtGpfjOOz+/d9vjAz1qXu7a7GrgjeeTrZ2VNIv/icSuNqQYfWoNGcVfakoS1l5wa0i3In74KhZWPaNmVFL+sJZ3svLaoTCIh4HohVGAqBVXngSVaZbrwsV+vYOpokxuEooJFbyZzXx68k7ltgHdjWzKEx2ApVWakHBOXP/CyG0unt6UBJs8tTYUojz3822LhCILDpblVZ3Pl2f+zMpiyzJXjx2HLUQWCWqWq65Jl4FdabKVnfntpZPwmS+5bgK2R6vn3+ESO45fsBT4fzvlvcSxsvu7jgSGKH6PFkzpjyz1Kgx1J3kz3lxeGF+btA+DAkfQa22Rm0n3s9JMelTtb0qRDMpIIuKxBBJsDFT8RNI021p6IMGvx9wru/+Tbz3+504aw X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 1 Oct 2025 16:34:45 +0200 David Hildenbrand wrote: > On 01.10.25 16:28, Wei Yang wrote: > > We add pmd folio into ds_queue on the first page fault in > > __do_huge_pmd_anonymous_page(), so that we can split it in case of > > memory pressure. This should be the same for a pmd folio during wp > > page fault. > > > > Add it as expected. > > > > Signed-off-by: Wei Yang > > Cc: David Hildenbrand > > Cc: Lance Yang > > Cc: Dev Jain > > Fixes: please, and I think we want CC stable. And a reason for Fixes: and Cc:stable, please. ie, a description of the userspace visible runtime effects. Cheers, akpmbot.