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authorMike Rapoport (IBM) <rppt@kernel.org>2023-03-21 20:05:03 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-04-06 05:42:52 +0300
commit534ef4e19160b1034430c4c4fbc1bf94c0253a51 (patch)
tree899781aa4f93b1da998412614b7e424947147048 /mm/mm_init.c
parent9420f89db2dd611c5b436a13e13f74d65ecc3a6a (diff)
downloadlinux-534ef4e19160b1034430c4c4fbc1bf94c0253a51.tar.xz
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>
Diffstat (limited to 'mm/mm_init.c')
-rw-r--r--mm/mm_init.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 68d0187c7886..2e60c7186132 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -607,6 +607,25 @@ int __meminit early_pfn_to_nid(unsigned long pfn)
return nid;
}
+
+int hashdist = HASHDIST_DEFAULT;
+
+static int __init set_hashdist(char *str)
+{
+ if (!str)
+ return 0;
+ hashdist = simple_strtoul(str, &str, 0);
+ return 1;
+}
+__setup("hashdist=", set_hashdist);
+
+static inline void fixup_hashdist(void)
+{
+ if (num_node_state(N_MEMORY) == 1)
+ hashdist = 0;
+}
+#else
+static inline void fixup_hashdist(void) {}
#endif /* CONFIG_NUMA */
#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
@@ -1855,6 +1874,9 @@ void __init free_area_init(unsigned long *max_zone_pfn)
}
memmap_init();
+
+ /* disable hash distribution for systems with a single node */
+ fixup_hashdist();
}
/**