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authorTomáš Golembiovský <tgolembi@redhat.com>2017-11-12 15:05:38 +0300
committerMichael S. Tsirkin <mst@redhat.com>2018-01-31 02:47:33 +0300
commit4d32029b8ddb7be4d1699c6d8e1675ff5476d149 (patch)
treefea4b71d279dc368d57afe437acaa678be6bbabf /drivers/virtio
parentd8a5b80568a9cb66810e75b182018e9edb68e8ff (diff)
downloadlinux-4d32029b8ddb7be4d1699c6d8e1675ff5476d149.tar.xz
virtio_balloon: include disk/file caches memory statistics
Add a new field VIRTIO_BALLOON_S_CACHES to virtio_balloon memory statistics protocol. The value represents all disk/file caches. In this case it corresponds to the sum of values Buffers+Cached+SwapCached from /proc/meminfo. Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio_balloon.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index a1fb52cb3f0a..dfe5684000be 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -257,11 +257,13 @@ static unsigned int update_balloon_stats(struct virtio_balloon *vb)
struct sysinfo i;
unsigned int idx = 0;
long available;
+ unsigned long caches;
all_vm_events(events);
si_meminfo(&i);
available = si_mem_available();
+ caches = global_node_page_state(NR_FILE_PAGES);
#ifdef CONFIG_VM_EVENT_COUNTERS
update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_IN,
@@ -277,6 +279,8 @@ static unsigned int update_balloon_stats(struct virtio_balloon *vb)
pages_to_bytes(i.totalram));
update_stat(vb, idx++, VIRTIO_BALLOON_S_AVAIL,
pages_to_bytes(available));
+ update_stat(vb, idx++, VIRTIO_BALLOON_S_CACHES,
+ pages_to_bytes(caches));
return idx;
}