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virtio_balloon: include disk/file caches memory statistics

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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>
This commit is contained in:
Tomáš Golembiovský
2017-11-12 13:05:38 +01:00
committed by Michael S. Tsirkin
parent d8a5b80568
commit 4d32029b8d
2 changed files with 6 additions and 1 deletions
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include/uapi/linux/virtio_balloon.h
+2 -1
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@@ -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.