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author | Adam Litke | 2009-11-30 10:14:15 -0600 |
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committer | Rusty Russell | 2010-02-24 14:22:08 +1030 |
commit | 9564e138b1f6eb137f7149772438d3f3fb3277dd (patch) | |
tree | 2e53562c2b7ab7051d448b8f81766dc61ad524b5 /drivers/dio | |
parent | 1f08b833ddbdb1c8e81c4b1053c2ebb7b89cb437 (diff) |
virtio: Add memory statistics reporting to the balloon driver (V4)
Changes since V3:
- Do not do endian conversions as they will be done in the host
- Report stats that reference a quantity of memory in bytes
- Minor coding style updates
Changes since V2:
- Increase stat field size to 64 bits
- Report all sizes in kb (not pages)
- Drop anon_pages stat and fix endianness conversion
Changes since V1:
- Use a virtqueue instead of the device config space
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.
This patch enables the guest-side support by adding stats collection and
reporting to the virtio balloon driver.
Signed-off-by: Adam Litke <agl@us.ibm.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (minor fixes)
Diffstat (limited to 'drivers/dio')
0 files changed, 0 insertions, 0 deletions