diff options
Diffstat (limited to 'patches/next/drivers-virtio-virtio_balloon-integrate-ACMA-and-bal.patch')
| -rw-r--r-- | patches/next/drivers-virtio-virtio_balloon-integrate-ACMA-and-bal.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/patches/next/drivers-virtio-virtio_balloon-integrate-ACMA-and-bal.patch b/patches/next/drivers-virtio-virtio_balloon-integrate-ACMA-and-bal.patch new file mode 100644 index 0000000..3518643 --- /dev/null +++ b/patches/next/drivers-virtio-virtio_balloon-integrate-ACMA-and-bal.patch @@ -0,0 +1,52 @@ +From bc4456c66d21bafbd5a794918117efa36557be16 Mon Sep 17 00:00:00 2001 +From: SeongJae Park <sj@kernel.org> +Date: Wed, 28 Feb 2024 16:17:08 -0800 +Subject: [PATCH] drivers/virtio/virtio_balloon: integrate ACMA and ballooning + +This is just an idea. + +Signed-off-by: SeongJae Park <sj@kernel.org> +--- + drivers/virtio/virtio_balloon.c | 26 ++++++++++++++++++++++++++ + 1 file changed, 26 insertions(+) + +diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c +index 1f5b3dd31fcf..a954d75789ae 100644 +--- a/drivers/virtio/virtio_balloon.c ++++ b/drivers/virtio/virtio_balloon.c +@@ -472,6 +472,32 @@ static void virtballoon_changed(struct virtio_device *vdev) + struct virtio_balloon *vb = vdev->priv; + unsigned long flags; + ++#ifdef CONFIG_ACMA_BALLOON ++ s64 target; ++ u32 num_pages; ++ ++ ++ /* Legacy balloon config space is LE, unlike all other devices. */ ++ virtio_cread_le(vb->vdev, struct virtio_balloon_config, num_pages, ++ &num_pages); ++ ++ /* ++ * Aligned up to guest page size to avoid inflating and deflating ++ * balloon endlessly. ++ */ ++ target = ALIGN(num_pages, VIRTIO_BALLOON_PAGES_PER_PAGE); ++ ++ /* ++ * If the given new max mem size is larger than current acma's max mem ++ * size, same to normal max mem adjustment. ++ * If the given new max mem size is smaller than current acma's max mem ++ * size, strong aggressiveness is applied while memory for meeting the ++ * new max mem is met is stolen. ++ */ ++ acma_set_max_mem_aggressive(totalram_pages() - target); ++ return; ++#endif ++ + spin_lock_irqsave(&vb->stop_update_lock, flags); + if (!vb->stop_update) { + start_update_balloon_size(vb); +-- +2.39.2 + |