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bh=TaIF8uOFvFJGyXMEdrAO+/oj2U/AdR6oWCeZo8P3C/k=; b=vr5BSHqhwc/y6Qh5FDRBzpguk0i4apuBlQFHiwsHUH107WRH29mZoiF1cWmjNhjG329SRQ LZNjsUrE/twIVCAA== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 39BE113691; Tue, 8 Apr 2025 08:42:11 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id RglWC2Ph9Gd6VgAAD6G6ig (envelope-from ); Tue, 08 Apr 2025 08:42:11 +0000 From: Oscar Salvador To: Andrew Morton Cc: David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vlastimil Babka , Harry Yoo , Jonathan Cameron , linux-cxl@vger.kernel.org, Oscar Salvador Subject: [PATCH v2 0/3] Implement numa node notifier Date: Tue, 8 Apr 2025 10:41:50 +0200 Message-ID: <20250408084153.255762-1-osalvador@suse.de> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 X-Rspamd-Action: no action X-Rspamd-Queue-Id: 8ECDD100007 X-Stat-Signature: zqinryze8pkfmgwan96mafse6hdct9jy X-Rspam-User: X-Rspamd-Server: rspam12 X-HE-Tag: 1744101733-480962 X-HE-Meta: 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 FTSfDSNk oyPZ9vWmce/PPEco0a3990g/PEgwpMJ51UzlOsm/KcV+Erbh38DhUcCM6u78A8IZtvkV3ZKUKu7HgKpu89m0zXaP8AhzLaUgYbamy3N8CkKAvp6MDHfYiukIUsEee7uDH4bVFbN+kKwmb7Y48EjU9WtPB9lZRjGzXiSqaiAOOyjfIEOb/PQ/ms843g3jo9thLBQTgNmoSXHpHVn5xmjldH3mgOk7tXvc/kT75L99h90VjMugso1ZMAl5WZwEa5Mg32dDm 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: v1 -> v2: - Remove status_change_nid_normal and the code that deals with it (David & Vlastimil) - Remove slab_mem_offline_callback (David & Vlastimil) - Change the order of canceling the notifiers in {online,offline}_pages (Vlastimil) - Fix up a couple of whitespaces (Jonathan Cameron) - Add RBs-by Memory notifier is a tool that allow consumers to get notified whenever memory gets onlined or offlined in the system. Currently, there are 10 consumers of that, but 5 out of those 10 consumers are only interested in getting notifications when a numa node changes its memory state. That means going from memoryless to memory-aware of vice versa. Which means that for every {online,offline}_pages operation they get notified even though the numa node might not have changed its state. While we are doing this, remove status_change_nid_normal, as the only current user (slub) does not really need it. This allows us to further simplify and clean up the code. The first patch gets rid of status_change_nid_normal in slub. The second patch implements a numa node notifier that does just that, and have those consumers register in there, so they get notified only when they are interested. The third patch replaces 'status_change_nid{_normal}' fields within memory_notify with a 'nid', as that is only what we need for memory notifer and update the only user of it (page_ext). Consumers that are only interested in numa node states change are: - memory-tier - slub - cpuset - hmat - cxl Oscar Salvador (3): mm,slub: Do not special case N_NORMAL nodes for slab_nodes mm,memory_hotplug: Implement numa node notifier mm,memory_hotplug: Rename status_change_nid parameter in memory_notify drivers/acpi/numa/hmat.c | 6 +- drivers/base/node.c | 19 +++++++ drivers/cxl/core/region.c | 14 ++--- drivers/cxl/cxl.h | 4 +- include/linux/memory.h | 38 ++++++++++++- kernel/cgroup/cpuset.c | 2 +- mm/memory-tiers.c | 8 +-- mm/memory_hotplug.c | 117 +++++++++++++++++++++----------------- mm/page_ext.c | 12 +--- mm/slub.c | 41 ++----------- 10 files changed, 145 insertions(+), 116 deletions(-)