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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Subject: Re: [PATCH 3/6] mm/folio, mm/mlock: Don't batch folios in per-CPU LRU caches on isolated CPUs Message-ID: <202611032053.I3Ud8d11-lkp@intel.com> References: <20261103075940.110308-4-matthew.ruffell@canonical.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261103075940.110308-4-matthew.ruffell@canonical.com> X-Stat-Signature: 7cpbmg37k8xd71tke1fnnf4n3a86egmb X-Rspam-User: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: ACB13140006 X-HE-Tag: 1793710454-489932 X-HE-Meta: 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 f4qzyfXu Lstwi8vFINefaTA7i22ygSU+zzSOvvNuhKNTVgUT26YZhf5a58w6cqk0ZfQNn0rl+InmQt3UhYDxeiw+KHHrB++UeVmoIMU/6ydUVlXFg2wrCmGBOy2JI+87JWgFQOuxANtEU7b4YVqxHcHMVSQgZbQ3IqUZv1G54IEqBCWJj4j/owU0MoogGqRd6eOPXoFpH6ZSblrZppANy4QxlFCveZKD2cDvvVxx3+q6LQCb9+ImPWtJRdUMFZeEGujpu5R/+hEIU9u4a6VRm7AqkAz4KkBsy85v7Gn8Kt0FzxerrOCxwFcxjBOwAsp8ywKD9qhxr4PgflyM/qwY6OYODaujNp3wt7qb5vf1uUEYtjv3mRXhbKacqasysIQOLvjwWRz9XEPsvgDmXy3xupGs= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Hi Matthew, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Matthew-Ruffell/sched-isolation-Consider-nohz_full-CPUs-isolated-in-cpu_is_isolated-again/20261103-205935 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20261103075940.110308-4-matthew.ruffell%40canonical.com patch subject: [PATCH 3/6] mm/folio, mm/mlock: Don't batch folios in per-CPU LRU caches on isolated CPUs config: um-allnoconfig (https://download.01.org/0day-ci/archive/20261103/202611032053.I3Ud8d11-lkp@intel.com/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261103/202611032053.I3Ud8d11-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202611032053.I3Ud8d11-lkp@intel.com/ All errors (new ones prefixed by >>): >> mm/folio.c:293:6: error: call to undeclared function 'lru_batching_bypassed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 293 | if (lru_batching_bypassed()) | ^ 1 error generated. vim +/lru_batching_bypassed +293 mm/folio.c 280 281 static void __folio_batch_add_and_move(struct folio_batch __percpu *fbatch, 282 struct folio *folio, move_fn_t move_fn, bool disable_irq) 283 { 284 unsigned long flags; 285 286 folio_get(folio); 287 288 if (disable_irq) 289 local_lock_irqsave(&cpu_fbatches.lock_irq, flags); 290 else 291 local_lock(&cpu_fbatches.lock); 292 > 293 if (lru_batching_bypassed()) 294 folio_move_lru_now(folio, move_fn); 295 else if (!folio_batch_add(this_cpu_ptr(fbatch), folio) || 296 !folio_may_be_lru_cached(folio) || lru_cache_disabled()) 297 folio_batch_move_lru(this_cpu_ptr(fbatch), move_fn); 298 299 if (disable_irq) 300 local_unlock_irqrestore(&cpu_fbatches.lock_irq, flags); 301 else 302 local_unlock(&cpu_fbatches.lock); 303 } 304 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki