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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> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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> 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