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1737601660-416011 X-HE-Meta: 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gTJHiSz0UEVirLd2J6HjqvlX1YvXjiPzJKBK+6XN+sbpNeExwrCcn7MriT1zNK8yFwhCZBN5fbe5pU62sIYjNgTq88o+FY+tgx7bHKjjW78ThKxYLKlYKjrkkT0NhpxF0x2m486Knqeg/Xo/jG56ZfJ7eqIHzso9kRgjOg25SVySoJ04jWcH8Z1f5nohAYYGeBFrh81uhw1s5NuR7RPMPpapUsQExB7JG6NkH0uoR4Rpngpe7duLLzjbLMphxTxYPOhgyXs0Df7YHsT2rIypIPD03HkC6ClDvekfkLsh1c9wRBqv8Pi0Kq6dTOcBhg5T2LzCPuLOAzobx9oalBPvpm6sddqWS2Q9vv/5lceCvomtrris= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000009, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 22-Jan-25 11:31 PM, Gregory Price wrote: > On Tue, Jan 21, 2025 at 10:03:55AM +0530, Bharata B Rao wrote: >> I don't think moving count_vm_numa_event() to within >> CONFIG_NUMA_BALANCING is necessary as it is defined separately as NOP >> for !CONFIG_NUMA_BALANCING. >> > > NUMA_HINT_FAULTS and NUMA_HINT_FAULTS_LOCAL are only defined if > CONFIG_NUMA_BALANCING > > include/linux/vm_event_item.h > > #ifdef CONFIG_NUMA_BALANCING > NUMA_PTE_UPDATES, > NUMA_HUGE_PTE_UPDATES, > NUMA_HINT_FAULTS, > NUMA_HINT_FAULTS_LOCAL, > NUMA_PAGE_MIGRATE, > #endif What I meant is include/linux/vmstat.h has a definition for count_vm_numa_event() for !CONFIG_NUMA_BALANCING case like below: #ifdef CONFIG_NUMA_BALANCING #define count_vm_numa_event(x) count_vm_event(x) #define count_vm_numa_events(x, y) count_vm_events(x, y) #else #define count_vm_numa_event(x) do {} while (0) #define count_vm_numa_events(x, y) do { (void)(y); } while (0) #endif /* CONFIG_NUMA_BALANCING */ and hence moving count_vm_numa_events(NUMA_HINT_FAULTS) to within CONFIG_NUMA_BALANCING section in numa_migrate_check() isn't necessary. The current code already compiles fine when CONFIG_NUMA_BALANCING is turned off. > >> In fact numa_migrate_check() should be within CONFIG_NUMA_BALANCING as >> it should ideally be called only if NUMA balancing is enabled. The same >> could be said for the callers of numa_migrate_check() which are >> do_numa_page() and do_huge_pmd_numa_page(). >> > > Really what i'm reading is that these functions are in the wrong file, > since ifdef spaghetti in *.c files is not encouraged. These functions > should be moved somewhere else and given stubs if the build option is > off. Yes !CONFIG_NUMA_BALANCING stubs for numa_migrate_check(), do_numa_page() and do_huge_pmd_numa_page() would be good. Regards, Bharata.