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mm: handle hashdist initialization in mm/mm_init.c
The hashdist variable must be initialized before the first call to alloc_large_system_hash() and free_area_init() looks like a better place for it than page_alloc_init(). Move hashdist handling to mm/mm_init.c Link: https://lkml.kernel.org/r/20230321170513.2401534-5-rppt@kernel.org Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Doug Berger <opendmb@gmail.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Michal Hocko <mhocko@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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mm/mm_init.c
22
mm/mm_init.c
@ -607,6 +607,25 @@ int __meminit early_pfn_to_nid(unsigned long pfn)
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return nid;
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}
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int hashdist = HASHDIST_DEFAULT;
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static int __init set_hashdist(char *str)
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{
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if (!str)
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return 0;
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hashdist = simple_strtoul(str, &str, 0);
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return 1;
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}
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__setup("hashdist=", set_hashdist);
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static inline void fixup_hashdist(void)
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{
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if (num_node_state(N_MEMORY) == 1)
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hashdist = 0;
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}
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#else
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static inline void fixup_hashdist(void) {}
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#endif /* CONFIG_NUMA */
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#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
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@ -1855,6 +1874,9 @@ void __init free_area_init(unsigned long *max_zone_pfn)
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}
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memmap_init();
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/* disable hash distribution for systems with a single node */
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fixup_hashdist();
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}
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/**
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@ -6393,28 +6393,10 @@ static int page_alloc_cpu_online(unsigned int cpu)
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return 0;
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}
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#ifdef CONFIG_NUMA
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int hashdist = HASHDIST_DEFAULT;
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static int __init set_hashdist(char *str)
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{
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if (!str)
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return 0;
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hashdist = simple_strtoul(str, &str, 0);
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return 1;
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}
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__setup("hashdist=", set_hashdist);
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#endif
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void __init page_alloc_init(void)
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{
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int ret;
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#ifdef CONFIG_NUMA
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if (num_node_state(N_MEMORY) == 1)
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hashdist = 0;
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#endif
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ret = cpuhp_setup_state_nocalls(CPUHP_PAGE_ALLOC,
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"mm/page_alloc:pcp",
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page_alloc_cpu_online,
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