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| author | Adam Litke <agl@us.ibm.com> | 2010-01-26 14:17:35 -0600 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2010-01-26 17:08:03 -0600 |
| commit | 605dbb9c7d45e148ad324fd2be6d67c424426ff4 (patch) | |
| tree | 89b9362c879d319b5061424035e3dbead9555e70 /qemu-monitor.hx | |
| parent | 7a70c9da4f4e92d71a3438fb51fd939b79e5dc7c (diff) | |
| download | qemu-605dbb9c7d45e148ad324fd2be6d67c424426ff4.tar.gz qemu-605dbb9c7d45e148ad324fd2be6d67c424426ff4.tar.bz2 qemu-605dbb9c7d45e148ad324fd2be6d67c424426ff4.zip | |
virtio: Add memory statistics reporting to the balloon driver
When using ballooning to manage overcommitted memory on a host, a system for
guests to communicate their memory usage to the host can provide information
that will minimize the impact of ballooning on the guests. The current method
employs a daemon running in each guest that communicates memory statistics to a
host daemon at a specified time interval. The host daemon aggregates this
information and inflates and/or deflates balloons according to the level of
host memory pressure. This approach is effective but overly complex since a
daemon must be installed inside each guest and coordinated to communicate with
the host. A simpler approach is to collect memory statistics in the virtio
balloon driver and communicate them directly to the hypervisor.
Signed-off-by: Adam Litke <agl@us.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'qemu-monitor.hx')
| -rw-r--r-- | qemu-monitor.hx | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/qemu-monitor.hx b/qemu-monitor.hx index 415734a464..b51bb47f25 100644 --- a/qemu-monitor.hx +++ b/qemu-monitor.hx @@ -891,7 +891,8 @@ ETEXI .params = "target", .help = "request VM to change it's memory allocation (in MB)", .user_print = monitor_user_noop, - .mhandler.cmd_new = do_balloon, + .mhandler.cmd_async = do_balloon, + .async = 1, }, STEXI |