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| author | Tomáš Golembiovský <tgolembi@redhat.com> | 2017-11-12 13:05:38 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-01-31 01:47:33 +0200 |
| commit | 4d32029b8ddb7be4d1699c6d8e1675ff5476d149 (patch) | |
| tree | fea4b71d279dc368d57afe437acaa678be6bbabf | |
| parent | d8a5b80568a9cb66810e75b182018e9edb68e8ff (diff) | |
| download | linux-4d32029b8ddb7be4d1699c6d8e1675ff5476d149.tar.bz2 | |
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>
| -rw-r--r-- | drivers/virtio/virtio_balloon.c | 4 | ||||
| -rw-r--r-- | include/uapi/linux/virtio_balloon.h | 3 |
2 files changed, 6 insertions, 1 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; } diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h index 343d7ddefe04..4e8b8304b793 100644 --- a/include/uapi/linux/virtio_balloon.h +++ b/include/uapi/linux/virtio_balloon.h @@ -52,7 +52,8 @@ struct virtio_balloon_config { #define VIRTIO_BALLOON_S_MEMFREE 4 /* Total amount of free memory */ #define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */ #define VIRTIO_BALLOON_S_AVAIL 6 /* Available memory as in /proc */ -#define VIRTIO_BALLOON_S_NR 7 +#define VIRTIO_BALLOON_S_CACHES 7 /* Disk caches */ +#define VIRTIO_BALLOON_S_NR 8 /* * Memory statistics structure. |