Thread (50 messages) 50 messages, 9 authors, 2021-08-09
STALE1774d
Revisions (3)
  1. rfc current
  2. v2 [diff vs current]
  3. v1 [diff vs current]

[RFC PATCH 10/15] virtio: virtio_balloon: use PAGES_PER_SECTION instead of MAX_ORDER_NR_PAGES.

From: Zi Yan <hidden>
Date: 2021-08-05 19:04:10
Also in: lkml
Subsystem: the rest, virtio balloon, virtio core · Maintainers: Linus Torvalds, "Michael S. Tsirkin", David Hildenbrand, Jason Wang

From: Zi Yan <ziy@nvidia.com>

It keeps the existing behavior when MAX_ORDER grows beyond a section.

Signed-off-by: Zi Yan <ziy@nvidia.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: David Hildenbrand <redacted>
Cc: Jason Wang <jasowang@redhat.com>
Cc: virtualization@lists.linux-foundation.org
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/virtio/virtio_balloon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 47dce91f788c..de8d0355d827 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -36,7 +36,7 @@
 #define VIRTIO_BALLOON_FREE_PAGE_ALLOC_FLAG (__GFP_NORETRY | __GFP_NOWARN | \
 					     __GFP_NOMEMALLOC)
 /* The order of free page blocks to report to host */
-#define VIRTIO_BALLOON_HINT_BLOCK_ORDER (MAX_ORDER - 1)
+#define VIRTIO_BALLOON_HINT_BLOCK_ORDER (PFN_SECTION_SHIFT - 1)
 /* The size of a free page block in bytes */
 #define VIRTIO_BALLOON_HINT_BLOCK_BYTES \
 	(1 << (VIRTIO_BALLOON_HINT_BLOCK_ORDER + PAGE_SHIFT))
-- 
2.30.2

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