From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Wei Wang <wei.w.wang@intel.com>,
Khazhismel Kumykov <khazhy@google.com>,
Jason Wang <jasowang@redhat.com>,
virtualization@lists.linux-foundation.org
Subject: [PATCH 1/2] virtio_balloon: name cleanups
Date: Tue, 19 Nov 2019 05:29:26 -0500 [thread overview]
Message-ID: <20191119102838.39380-1-mst@redhat.com> (raw)
free_page_order is a confusing name. It's not a page order
actually, it's the order of the block of memory we are hinting.
Rename to hint_block_order. Also, rename SIZE to BYTES
to make it clear it's the block size in bytes.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
drivers/virtio/virtio_balloon.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 65df40f261ab..b6a95cd28d9f 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -32,10 +32,10 @@
#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_FREE_PAGE_ORDER (MAX_ORDER - 1)
+#define VIRTIO_BALLOON_HINT_BLOCK_ORDER (MAX_ORDER - 1)
/* The size of a free page block in bytes */
-#define VIRTIO_BALLOON_FREE_PAGE_SIZE \
- (1 << (VIRTIO_BALLOON_FREE_PAGE_ORDER + PAGE_SHIFT))
+#define VIRTIO_BALLOON_HINT_BLOCK_BYTES \
+ (1 << (VIRTIO_BALLOON_HINT_BLOCK_ORDER + PAGE_SHIFT))
#ifdef CONFIG_BALLOON_COMPACTION
static struct vfsmount *balloon_mnt;
@@ -380,7 +380,7 @@ static unsigned long return_free_pages_to_mm(struct virtio_balloon *vb,
if (!page)
break;
free_pages((unsigned long)page_address(page),
- VIRTIO_BALLOON_FREE_PAGE_ORDER);
+ VIRTIO_BALLOON_HINT_BLOCK_ORDER);
}
vb->num_free_page_blocks -= num_returned;
spin_unlock_irq(&vb->free_page_list_lock);
@@ -582,7 +582,7 @@ static int get_free_page_and_send(struct virtio_balloon *vb)
;
page = alloc_pages(VIRTIO_BALLOON_FREE_PAGE_ALLOC_FLAG,
- VIRTIO_BALLOON_FREE_PAGE_ORDER);
+ VIRTIO_BALLOON_HINT_BLOCK_ORDER);
/*
* When the allocation returns NULL, it indicates that we have got all
* the possible free pages, so return -EINTR to stop.
@@ -591,13 +591,13 @@ static int get_free_page_and_send(struct virtio_balloon *vb)
return -EINTR;
p = page_address(page);
- sg_init_one(&sg, p, VIRTIO_BALLOON_FREE_PAGE_SIZE);
+ sg_init_one(&sg, p, VIRTIO_BALLOON_HINT_BLOCK_BYTES);
/* There is always 1 entry reserved for the cmd id to use. */
if (vq->num_free > 1) {
err = virtqueue_add_inbuf(vq, &sg, 1, p, GFP_KERNEL);
if (unlikely(err)) {
free_pages((unsigned long)p,
- VIRTIO_BALLOON_FREE_PAGE_ORDER);
+ VIRTIO_BALLOON_HINT_BLOCK_ORDER);
return err;
}
virtqueue_kick(vq);
@@ -610,7 +610,7 @@ static int get_free_page_and_send(struct virtio_balloon *vb)
* The vq has no available entry to add this page block, so
* just free it.
*/
- free_pages((unsigned long)p, VIRTIO_BALLOON_FREE_PAGE_ORDER);
+ free_pages((unsigned long)p, VIRTIO_BALLOON_HINT_BLOCK_ORDER);
}
return 0;
@@ -765,11 +765,11 @@ static unsigned long shrink_free_pages(struct virtio_balloon *vb,
unsigned long blocks_to_free, blocks_freed;
pages_to_free = round_up(pages_to_free,
- 1 << VIRTIO_BALLOON_FREE_PAGE_ORDER);
- blocks_to_free = pages_to_free >> VIRTIO_BALLOON_FREE_PAGE_ORDER;
+ 1 << VIRTIO_BALLOON_HINT_BLOCK_ORDER);
+ blocks_to_free = pages_to_free >> VIRTIO_BALLOON_HINT_BLOCK_ORDER;
blocks_freed = return_free_pages_to_mm(vb, blocks_to_free);
- return blocks_freed << VIRTIO_BALLOON_FREE_PAGE_ORDER;
+ return blocks_freed << VIRTIO_BALLOON_HINT_BLOCK_ORDER;
}
static unsigned long leak_balloon_pages(struct virtio_balloon *vb,
@@ -825,7 +825,7 @@ static unsigned long virtio_balloon_shrinker_count(struct shrinker *shrinker,
unsigned long count;
count = vb->num_pages / VIRTIO_BALLOON_PAGES_PER_PAGE;
- count += vb->num_free_page_blocks << VIRTIO_BALLOON_FREE_PAGE_ORDER;
+ count += vb->num_free_page_blocks << VIRTIO_BALLOON_HINT_BLOCK_ORDER;
return count;
}
--
MST
next reply other threads:[~2019-11-19 10:29 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-19 10:29 Michael S. Tsirkin [this message]
2019-11-19 10:29 ` [PATCH 2/2] virtio_balloon: divide/multiply instead of shifts Michael S. Tsirkin
2019-11-19 11:38 ` David Hildenbrand
2019-11-19 12:24 ` Wei Wang
2019-11-19 11:37 ` [PATCH 1/2] virtio_balloon: name cleanups David Hildenbrand
2019-11-19 12:18 ` Wei Wang
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