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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: <202611032138.4bxGcYLC-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: x4crtc83fiho1qqqepkmxetmpqoq9obq X-Rspamd-Queue-Id: 85A37180005 X-Rspam-User: X-Rspamd-Server: rspam08 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-HE-Tag: 1793712680-619203 X-HE-Meta: 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 huavJxYU 5gLeHWkg3pXELfe0NfozTQJC+U0M9gyfScMNPXHmh5hnPaWO12Qt0/V5et0RE/quIDxTPanJ14eE0jPEZxW7IhSSRKeJY6ujpbERi1h/mEEe9UE+yi4RAy6tDR9/JH+vEca+fjZKEL3ONFmNT55hmctPaH4PmmO0mD/WbxlibMrSBJ7op/xUVN3DvpQ7i2m/ZGMQQY5Nf6rWdFogbrQEVhx8UT51qIwb1Eer23Vw/mfNwOLNw5CJD0LDpRLXmDqBN+oEXMfJ8nvZKMs8QP+Rq10uTNotHm8W1eEPZrd3pm4BSN5Qzptb1fTQ86xLS04lSQc5X4VeXK4LggFR9UeO8jhvMr4b8XezfqxPYPPue5cBgsBNvYONMJOmAXpGYs1ln+guVg4fV8tvbdB0= 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: sh-allnoconfig (https://download.01.org/0day-ci/archive/20261103/202611032138.4bxGcYLC-lkp@intel.com/config) compiler: sh4-linux-gcc (GCC) 16.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261103/202611032138.4bxGcYLC-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/202611032138.4bxGcYLC-lkp@intel.com/ All errors (new ones prefixed by >>): mm/folio.c: In function '__folio_batch_add_and_move': >> mm/folio.c:293:13: error: implicit declaration of function 'lru_batching_bypassed' [-Wimplicit-function-declaration] 293 | if (lru_batching_bypassed()) | ^~~~~~~~~~~~~~~~~~~~~ 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