From 64d1a58f3ffe37ee28c0bc0c34bece8ebd1f6356 Mon Sep 17 00:00:00 2001
From: Jonathan Helman <jonathan.helman@oracle.com>
Date: Wed, 18 Apr 2018 10:10:19 -0700
Subject: content: document hugetlb page allocation counts

The Linux kernel exports the number of successful and failed
hugetlb page allocations via the virtio balloon driver. These
two counts need to be documented in this specification.

Fixes: https://github.com/oasis-tcs/virtio-spec/issues/8
Signed-off-by: Jonathan Helman <jonathan.helman@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 content.tex | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'content.tex')

diff --git a/content.tex b/content.tex
index 7a92cb1..110ab70 100644
--- a/content.tex
+++ b/content.tex
@@ -4516,6 +4516,8 @@ struct virtio_balloon_stat {
 #define VIRTIO_BALLOON_S_MEMTOT   5
 #define VIRTIO_BALLOON_S_AVAIL    6
 #define VIRTIO_BALLOON_S_CACHES   7
+#define VIRTIO_BALLOON_S_HTLB_PGALLOC 8
+#define VIRTIO_BALLOON_S_HTLB_PGFAIL  9
         le16 tag;
         le64 val;
 } __attribute__((packed));
@@ -4604,6 +4606,12 @@ first buffer.
 \item[VIRTIO_BALLOON_S_CACHES (7)] The amount of memory, in bytes, that can be
   quickly reclaimed without additional I/O. Typically these pages are used for
   caching files from disk.
+
+\item[VIRTIO_BALLOON_S_HTLB_PGALLOC (8)] The number of successful hugetlb page
+  allocations in the guest.
+
+\item[VIRTIO_BALLOON_S_HTLB_PGFAIL (9)] The number of failed hugetlb page
+  allocations in the guest.
 \end{description}
 
 \section{SCSI Host Device}\label{sec:Device Types / SCSI Host Device}
-- 
cgit v1.2.3

