Re: [libvirt] [PATCH 8/8] Allow balloon driver collection to be adjusted dynamically

Extend the virDomainSetMemeoryFlags() to accept a 'VIR_DOMAIN_MEM_PERIOD' which will be used to dynamically set the collection period for the balloon driver via a 'virsh dommemstat <domain> --period <value>' command. Add the --current, --live, & --config options to dommemstat. --- docs/formatdomain.html.in | 14 +++++++++ include/libvirt/libvirt.h.in | 1 + src/libvirt.c | 8 ++++- src/qemu/qemu_driver.c | 44 +++++++++++++++++++++++++++- tools/virsh-domain-monitor.c | 70 ++++++++++++++++++++++++++++++++++++++++++-- 5 files changed, 132 insertions(+), 5 deletions(-)

diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c index 3ba829c..f123247 100644 --- a/tools/virsh-domain-monitor.c +++ b/tools/virsh-domain-monitor.c @@ -306,6 +306,23 @@ static const vshCmdOptDef opts_dommemstat[] = { .flags = VSH_OFLAG_REQ, .help = N_("domain name, id or uuid") }, + {.name = "period", + .type = VSH_OT_DATA, + .flags = VSH_OFLAG_EMPTY_OK, + .help = N_("period in seconds to set collection") + }, + {.name = "config", + .type = VSH_OT_BOOL, + .help = N_("affect next boot") + }, + {.name = "live", + .type = VSH_OT_BOOL, + .help = N_("affect running domain") + }, + {.name = "current", + .type = VSH_OT_BOOL, + .help = N_("affect current domain") + }, {.name = NULL} }; @@ -316,15 +333,60 @@ cmdDomMemStat(vshControl *ctl, const vshCmd *cmd) const char *name; struct _virDomainMemoryStat stats[VIR_DOMAIN_MEMORY_STAT_NR]; unsigned int nr_stats, i; + int ret = false; + int rv = 0; + int period = -1; + bool config = vshCommandOptBool(cmd, "config"); + bool live = vshCommandOptBool(cmd, "live"); + bool current = vshCommandOptBool(cmd, "current"); + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; + + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; if (!(dom = vshCommandOptDomain(ctl, cmd, &name))) return false; + /* none of the options were specified - choose defaults based on state */ + if (!current && !live && !config) { + if (virDomainIsActive(dom) == 1) + flags |= VIR_DOMAIN_AFFECT_LIVE; + else + flags |= VIR_DOMAIN_AFFECT_CONFIG;

+ } + + /* Providing a period will adjust the balloon driver collection period. + * This is not really an unsigned long, but it + */ + if ((rv = vshCommandOptInt(cmd, "period", &period)) < 0) { + vshError(ctl, "%s", + _("Unable to parse integer parameter.")); + goto cleanup; + } + if (rv > 0) { + if (period < 0) { + vshError(ctl, _("Invalid collection period value '%d'"), period); + goto cleanup; + } + + flags |= VIR_DOMAIN_MEM_PERIOD; + if (virDomainSetMemoryFlags(dom, period, flags) < 0) { + vshError(ctl, "%s", + _("Unable to change balloon collection period.")); + } else { + ret = true; + } + goto cleanup; + } + nr_stats = virDomainMemoryStats(dom, stats, VIR_DOMAIN_MEMORY_STAT_NR, 0); if (nr_stats == -1) { vshError(ctl, _("Failed to get memory statistics for domain %s"), name); - virDomainFree(dom); - return false; + goto cleanup; } for (i = 0; i < nr_stats; i++) { @@ -346,8 +408,10 @@ cmdDomMemStat(vshControl *ctl, const vshCmd *cmd) vshPrint(ctl, "rss %llu\n", stats[i].val); } + ret = true; +cleanup: virDomainFree(dom); - return true; + return ret; } /*