On 07.07.25 16:23, Pankaj Raghav (Samsung) wrote:
From: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
Add huge_zero_page_shrinker_init() and huge_zero_page_shrinker_exit().
As shrinker will not be needed when static PMD zero page is enabled,
these two functions can be a no-op.
This is a preparation patch for static PMD zero page. No functional
changes.
Signed-off-by: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
---
mm/huge_memory.c | 38 +++++++++++++++++++++++++++-----------
1 file changed, 27 insertions(+), 11 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index d3e66136e41a..101b67ab2eb6 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -289,6 +289,24 @@ static unsigned long shrink_huge_zero_page_scan(struct shrinker *shrink,
}
static struct shrinker *huge_zero_page_shrinker;
+static int huge_zero_page_shrinker_init(void)
+{
+ huge_zero_page_shrinker = shrinker_alloc(0, "thp-zero");
+ if (!huge_zero_page_shrinker)
+ return -ENOMEM;
+
+ huge_zero_page_shrinker->count_objects = shrink_huge_zero_page_count;
+ huge_zero_page_shrinker->scan_objects = shrink_huge_zero_page_scan;
+ shrinker_register(huge_zero_page_shrinker);
+ return 0;
+}
+
+static void huge_zero_page_shrinker_exit(void)
+{
+ shrinker_free(huge_zero_page_shrinker);
+ return;
+}
While at it, we should rename most of that to "huge_zero_folio" I assume.
--
Cheers,
David / dhildenb
