As we know, arm64 also support gigantic hugepage eg. 1G.
So I try to use this function by adding hugepagesz=1G
in kernel parameters, with CONFIG_CMA=y.
However, when:
echo xx > /sys/kernel/mm/hugepages/hugepages-1048576kB/
nr_hugepages
it failed with the info:
-bash: echo: write error: Invalid argument
This patch make gigantic hugepage can be used on arm64,
when CONFIG_CMA=y or other related configs is enable.
Signed-off-by: Xie Yisheng <xieyisheng1@xxxxxxxxxx>
---
mm/hugetlb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 87e11d8..b4d8048 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1022,7 +1022,8 @@ static int hstate_next_node_to_free(struct hstate *h, nodemask_t *nodes_allowed)
((node = hstate_next_node_to_free(hs, mask)) || 1); \
nr_nodes--)
-#if (defined(CONFIG_X86_64) || defined(CONFIG_S390)) && \
+#if (defined(CONFIG_X86_64) || defined(CONFIG_S390) || \
+ defined(CONFIG_ARM64)) && \
((defined(CONFIG_MEMORY_ISOLATION) && defined(CONFIG_COMPACTION)) || \
defined(CONFIG_CMA))
static void destroy_compound_gigantic_page(struct page *page,
--
1.7.12.4
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