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mm: handle hashdist initialization in mm/mm_init.c

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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>
This commit is contained in:
Mike Rapoport (IBM) 2023-03-21 19:05:03 +02:00 committed by Andrew Morton
parent 9420f89db2
commit 534ef4e191
2 changed files with 22 additions and 18 deletions
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22
mm/mm_init.c
View File

@ -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();
}
/**

18
mm/page_alloc.c
View File

@ -6393,28 +6393,10 @@ static int page_alloc_cpu_online(unsigned int cpu)
return 0;
}
#ifdef CONFIG_NUMA
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);
#endif
void __init page_alloc_init(void)
{
int ret;
#ifdef CONFIG_NUMA
if (num_node_state(N_MEMORY) == 1)
hashdist = 0;
#endif
ret = cpuhp_setup_state_nocalls(CPUHP_PAGE_ALLOC,
"mm/page_alloc:pcp",
page_alloc_cpu_online,