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Subject[PATCH] mm,numa: Remove remaining traces of rate-limiting.
Date
With Commit efaffc5e40ae ("mm, sched/numa: Remove rate-limiting of automatic
NUMA balancing migration"), we no more require migrate lock and its
initialization. Its redundant. Hence remove it.

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
include/linux/mmzone.h | 4 ----
mm/page_alloc.c | 10 ----------
2 files changed, 14 deletions(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 3f4c0b1..d4b0c79 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -668,10 +668,6 @@ typedef struct pglist_data {
wait_queue_head_t kcompactd_wait;
struct task_struct *kcompactd;
#endif
-#ifdef CONFIG_NUMA_BALANCING
- /* Lock serializing the migrate rate limiting window */
- spinlock_t numabalancing_migrate_lock;
-#endif
/*
* This is a per-node reserve of pages that are not available
* to userspace allocations.
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 706a738..e2ef1c1 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6193,15 +6193,6 @@ static unsigned long __init 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);
-}
-#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)
{
@@ -6226,7 +6217,6 @@ static void __meminit pgdat_init_internals(struct pglist_data *pgdat)
{
pgdat_resize_init(pgdat);

- pgdat_init_numabalancing(pgdat);
pgdat_init_split_queue(pgdat);
pgdat_init_kcompactd(pgdat);

--
2.7.4
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