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[109.81.80.123]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48e908cb62dsm42830055e9.10.2026.05.12.00.46.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 May 2026 00:46:10 -0700 (PDT) Date: Tue, 12 May 2026 09:46:09 +0200 From: Michal Hocko To: "David Hildenbrand (Arm)" Cc: "David S. Miller" , Andreas Larsson , Mike Rapoport , Andrew Morton , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH 0/8] mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 1) Message-ID: References: <20260511-bootmem_info_prep-v1-0-3fb0be6fc688@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260511-bootmem_info_prep-v1-0-3fb0be6fc688@kernel.org> X-Rspam-User: X-Rspamd-Queue-Id: 32A5AC0005 X-Rspamd-Server: rspam06 X-Stat-Signature: ftuiznosa8qdgs13qajwjwq34jdbten1 X-HE-Tag: 1778571971-826805 X-HE-Meta: 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 +GguT6Th Uc+8qK0QxkrCAkVXLWQtiOV+9OTjJXo7K7C078sVS1QwKq+Fq4yJUzMQyopXPYysIEfPPebKlkzWJMh+ITZcFh4HbtSYxGE1q0bZbrp6IH4fflpIPU0ZV6UfmNYuCI5rY7CLvw6H57R6Au1521ZtxHRW8yJovIWK3Nb6r1BVpl40qfE/7qTgdJY7v4nHWopo3sXtQvxpMzF70M/NYohE94Q44o2pVXg5AuhNH6Q2rtUN3YVpB9sYXZFy2xcgM6ADAgnYrpP4qJWXrZncenKf+KZU5CXFV6VSaLJTqYK/jTJOqhoLkyIhT9/6kfR3uwsKJ1YrenNitacf1UT/tCmxHE7lBV5T+AnSJSVc8Oif8MTzcAcc3GGifCQ1xw+7cjanxwnObSIdUMkRoUxbVZz09y4wDFFmWbgttWK+4kU01e9V0YHeGmQu504G747hFrVkkL337tqanWwhT/O1sOVQ4Ps/5u7rwxjZgoK8G7tOSkydT5sw= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon 11-05-26 16:05:28, David Hildenbrand wrote: > We want to remove CONFIG_HAVE_BOOTMEM_INFO_NODE. As a first step, > let's limit the remaining harm to x86 and core code, removing > sparc, ppc and s390 leftovers, starting the stepwise removal by removing > and simplifying some code. > > Once a related x86 vmemmap fix [1] is in, we can merge part 2 that will > remove CONFIG_HAVE_BOOTMEM_INFO_NODE entirely. > > Tested on x86-64 with hugetlb vmemmap optimization in combination with > KMEMLEAK, making sure that the problem reported in dd0ff4d12dd2 ("bootmem: > remove the vmemmap pages from kmemleak in put_page_bootmem") does not > reappear -- hoping I managed to trigger the original problem. > > Heavily cross-compiled, but let's let build bots run on it for a bit. > > [1] https://lore.kernel.org/r/20260429-vmemmap-v2-1-8dfcacffd877@kernel.org > > Signed-off-by: David Hildenbrand (Arm) > --- > David Hildenbrand (Arm) (8): > sparc/mm: remove register_page_bootmem_info() > mm/bootmem_info: drop initialization of page->lru > mm/bootmem_info: stop using PG_private > mm/bootmem_info: remove call to kmemleak_free_part_phys() > mm/bootmem_info: stop marking the pgdat as NODE_INFO > mm/bootmem_info: stop marking mem_section_usage as MIX_SECTION_INFO > s390/mm: use free_reserved_page() in vmem_free_pages() > powerpc/mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE > > arch/powerpc/mm/init_64.c | 8 -------- > arch/s390/mm/vmem.c | 3 +-- > arch/sparc/mm/init_64.c | 20 -------------------- > include/linux/bootmem_info.h | 1 - > mm/Kconfig | 2 +- > mm/bootmem_info.c | 25 ++----------------------- > 6 files changed, 4 insertions(+), 55 deletions(-) Good clean up. Feel free to add Acked-by: Michal Hocko to all patches but kmemleak one which I do not feel qualified to judge. Thanks! -- Michal Hocko SUSE Labs