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Re: [libvirt] [PATCH v2] qemu: Get memory balloon info correctly for text monitor



On 08/19/2011 04:17 AM, Osier Yang wrote:
* src/qemu/qemu_monitor_text.c: BALLOON_PREFIX was defined as
"balloon: actual=", which cause "actual=" is stripped early before
the real parsing. This patch changes BALLOON_PREFIX into "balloon: ",
and modifies related functions, also renames
"qemuMonitorParseExtraBalloonInfo" to "qemuMonitorParseBalloonInfo",
as after the changing, it parses all the info returned by "info balloon".

v2:

Adopted Adam's suggestion, parse "actual=" outside of the loop
of qemuMonitorParseBalloonInfo, and use qemuMonitorParseBalloonInfo
for qemuMonitorTextGetBalloonInfo.
---
  src/qemu/qemu_monitor_text.c |   53 +++++++++++++++++++++++++++--------------
  1 files changed, 35 insertions(+), 18 deletions(-)

Looks nicer.


diff --git a/src/qemu/qemu_monitor_text.c b/src/qemu/qemu_monitor_text.c
index 335e39e..a661626 100644
--- a/src/qemu/qemu_monitor_text.c
+++ b/src/qemu/qemu_monitor_text.c
@@ -547,8 +547,12 @@ static int parseMemoryStat(char **text, unsigned int tag,
              return 0;
          }

-        /* Convert bytes to kilobytes for libvirt */
          switch (tag) {
+            /* Convert megabytes to kilobytes for libvirt */
+            case VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON:
+                value = value<<  10;

Why not use 'value <<= 10;' for fewer characters?

      char *p = text;
      unsigned int nr_stats_found = 0;

+    /* Since "actual=" always comes first in the returned string,
+     * and sometime we only care about the value of "actual", such

s/sometime/sometimes/

+     * as qemuMonitorGetBalloonInfo, so parse it outside of the

Either s/so/we/, or s/Since// - leaving both 'since' and 'so' sounds awkward in the same sentence.

ACK with the nits fixed.

--
Eric Blake   eblake redhat com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org


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