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mm/page_alloc.c: move ifdefery out of free_area_init_core

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Patch series "Refactor free_area_init_core and add
free_area_init_core_hotplug", v6.

This patchset does three things:

 1) Clean up/refactor free_area_init_core/free_area_init_node
    by moving the ifdefery out of the functions.
 2) Move the pgdat/zone initialization in free_area_init_core to its
    own function.
 3) Introduce free_area_init_core_hotplug, a small subset of
    free_area_init_core, which is only called from memhotlug code path. In this
    way, we have:

    free_area_init_core: called during early initialization
    free_area_init_core_hotplug: called whenever a new node is allocated/re-used (memhotplug path)

This patch (of 5):

Moving the #ifdefs out of the function makes it easier to follow.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Oscar Salvador <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Reviewed-by: Pavel Tatashin <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Aaron Lu <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: David Hildenbrand <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Oscar Salvador 2018-08-21 21:53:29 -07:00 • committed by Linus Torvalds
commit ace1db3976
1 changed files with 37 additions and 13 deletions
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50
mm/page_alloc.c
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@ -6194,6 +6194,37 @@ static unsigned long __paginginit calc_memmap_size(unsigned long spanned_pages,
return PAGE_ALIGN(pages * sizeof(struct page)) >> PAGE_SHIFT;
}
#ifdef CONFIG_NUMA_BALANCING
static void pgdat_init_numabalancing(struct pglist_data *pgdat)
{
spin_lock_init(&pgdat->numabalancing_migrate_lock);
pgdat->numabalancing_migrate_nr_pages = 0;
pgdat->numabalancing_migrate_next_window = jiffies;
}
#else
static void pgdat_init_numabalancing(struct pglist_data *pgdat) {}
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static void pgdat_init_split_queue(struct pglist_data *pgdat)
{
spin_lock_init(&pgdat->split_queue_lock);
INIT_LIST_HEAD(&pgdat->split_queue);
pgdat->split_queue_len = 0;
}
#else
static void pgdat_init_split_queue(struct pglist_data *pgdat) {}
#endif
#ifdef CONFIG_COMPACTION
static void pgdat_init_kcompactd(struct pglist_data *pgdat)
{
init_waitqueue_head(&pgdat->kcompactd_wait);
}
#else
static void pgdat_init_kcompactd(struct pglist_data *pgdat) {}
#endif
/*
* Set up the zone data structures:
* - mark all pages reserved
@ -6208,21 +6239,14 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat)
int nid = pgdat->node_id;
pgdat_resize_init(pgdat);
#ifdef CONFIG_NUMA_BALANCING
spin_lock_init(&pgdat->numabalancing_migrate_lock);
pgdat->numabalancing_migrate_nr_pages = 0;
pgdat->numabalancing_migrate_next_window = jiffies;
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
spin_lock_init(&pgdat->split_queue_lock);
INIT_LIST_HEAD(&pgdat->split_queue);
pgdat->split_queue_len = 0;
#endif
pgdat_init_numabalancing(pgdat);
pgdat_init_split_queue(pgdat);
pgdat_init_kcompactd(pgdat);
init_waitqueue_head(&pgdat->kswapd_wait);
init_waitqueue_head(&pgdat->pfmemalloc_wait);
#ifdef CONFIG_COMPACTION
init_waitqueue_head(&pgdat->kcompactd_wait);
#endif
pgdat_page_ext_init(pgdat);
spin_lock_init(&pgdat->lru_lock);
lruvec_init(node_lruvec(pgdat));