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Fri, 2 May 2025 08:36:44 +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 Hm4tMRyEFGhVSwAAD6G6ig (envelope-from ); Fri, 02 May 2025 08:36:44 +0000 From: Oscar Salvador To: Andrew Morton Cc: David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vlastimil Babka , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Jonathan Cameron , Rakie Kim , Oscar Salvador Subject: [PATCH v3 0/3] Implement numa node notifier Date: Fri, 2 May 2025 10:36:21 +0200 Message-ID: <20250502083624.49849-1-osalvador@suse.de> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 6C3291F792 X-Spam-Score: -1.51 X-Rspamd-Action: no action X-Spamd-Result: default: False [-1.51 / 50.00]; BAYES_HAM(-3.00)[100.00%]; SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; MIME_TRACE(0.00)[0:+]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; ARC_NA(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; FREEMAIL_CC(0.00)[redhat.com,kvack.org,vger.kernel.org,suse.cz,gmail.com,huawei.com,sk.com,suse.de]; DKIM_TRACE(0.00)[suse.de:+]; TO_DN_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:dkim]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:104:10:150:64:97:from,2a07:de40:b281:106:10:150:64:167:received]; TAGGED_RCPT(0.00)[]; RCPT_COUNT_SEVEN(0.00)[9]; ASN(0.00)[asn:25478, ipnet:::/0, country:RU]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO X-Spam-Level: v2 -> v3: - Add Suggested-by (David) - Replace last N_NORMAL_MEMORY mention in slub (David) - Replace the notifier for autoweitght-mempolicy - Fix build on !CONFIG_MEMORY_HOTPLUG 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 - autoweight-mempolicy 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 | 21 +++++++ 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/mempolicy.c | 8 +-- mm/page_ext.c | 12 +--- mm/slub.c | 45 +++------------ 11 files changed, 153 insertions(+), 122 deletions(-) -- 2.49.0