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virtio-balloon: add hugetlb page allocation counts

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qemu should read and report hugetlb page allocation
counts exported in the following kernel patch:

    commit 4c3ca37c4a4394978fd0f005625f6064ed2b9a64
    Author: Jonathan Helman <jonathan.helman@oracle.com>
    Date:   Mon Mar 19 11:00:35 2018 -0700

    virtio_balloon: export hugetlb page allocation counts

    Export the number of successful and failed hugetlb page
    allocations via the virtio balloon driver. These 2 counts
    come directly from the vm_events HTLB_BUDDY_PGALLOC and
    HTLB_BUDDY_PGALLOC_FAIL.

Signed-off-by: Jonathan Helman <jonathan.helman@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Jonathan Helman 2018-03-19 15:28:49 -07:00 • committed by Michael S. Tsirkin
parent 50a6fa8f93
commit b7b1264429
3 changed files with 7 additions and 1 deletions
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2
docs/virtio-balloon-stats.txt
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@ -34,6 +34,8 @@ which will return a dictionary containing:
- stat-total-memory
- stat-available-memory
- stat-disk-caches
- stat-htlb-pgalloc
- stat-htlb-pgfail
o A key named last-update, which contains the last stats update
timestamp in seconds. Since this timestamp is generated by the host,