Merge 4.15-rc6 into char-misc-next

We want the fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 73f5d4556b3d..7e5e775e97f4 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2684,6 +2684,7 @@ void free_unref_page_list(struct list_head *list)
 {
 	struct page *page, *next;
 	unsigned long flags, pfn;
+	int batch_count = 0;
 
 	/* Prepare pages for freeing */
 	list_for_each_entry_safe(page, next, list, lru) {
@@ -2700,6 +2701,16 @@ void free_unref_page_list(struct list_head *list)
 		set_page_private(page, 0);
 		trace_mm_page_free_batched(page);
 		free_unref_page_commit(page, pfn);
+
+		/*
+		 * Guard against excessive IRQ disabled times when we get
+		 * a large list of pages to free.
+		 */
+		if (++batch_count == SWAP_CLUSTER_MAX) {
+			local_irq_restore(flags);
+			batch_count = 0;
+			local_irq_save(flags);
+		}
 	}
 	local_irq_restore(flags);
 }