On 16.07.2014 11:51, Chen Hanxiao wrote:
In lxc, we could not use setmaxmem command
with --config options.
This patch will add support for this.
Signed-off-by: Chen Hanxiao <chenhanx...@cn.fujitsu.com>
---
src/lxc/lxc_driver.c | 69 ++++++++++++++++++++++++++++++++++------------------
1 file changed, 46 insertions(+), 23 deletions(-)
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index b7b4b02..be6ee19 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -721,10 +721,10 @@ static int lxcDomainSetMemoryFlags(virDomainPtr dom,
unsigned long newmem,
virLXCDomainObjPrivatePtr priv;
virLXCDriverPtr driver = dom->conn->privateData;
virLXCDriverConfigPtr cfg = NULL;
- unsigned long oldmax = 0;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
- VIR_DOMAIN_AFFECT_CONFIG, -1);
+ VIR_DOMAIN_AFFECT_CONFIG |
+ VIR_DOMAIN_MEM_MAXIMUM, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
@@ -743,32 +743,55 @@ static int lxcDomainSetMemoryFlags(virDomainPtr dom,
unsigned long newmem,
&persistentDef) < 0)
goto cleanup;
- if (flags & VIR_DOMAIN_AFFECT_LIVE)
- oldmax = vm->def->mem.max_balloon;
- if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
- if (!oldmax || oldmax > persistentDef->mem.max_balloon)
- oldmax = persistentDef->mem.max_balloon;
- }
+ if (flags & VIR_DOMAIN_MEM_MAXIMUM) {
+ if (flags & VIR_DOMAIN_AFFECT_LIVE) {
+ if (newmem < vm->def->mem.cur_balloon) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("Cannot resize the max memory less than current"
+ " memory for an active domain"));
+ goto cleanup;
+ }
+ vm->def->mem.max_balloon = newmem;
Are things that easy? Don't we need to communicate this with the
lxc_controler somehow? Even though you allow only extending, I think
unless we are 100% sure guest will see the resize, we shouldn't allow this.
+ }
- if (newmem > oldmax) {
- virReportError(VIR_ERR_INVALID_ARG,
- "%s", _("Cannot set memory higher than max memory"));
- goto cleanup;
- }
+ if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
+ sa_assert(persistentDef);
Is this assert needed? Did clang complain or is this just a pure lefover
from copying from qemu_driver.c?
+ persistentDef->mem.max_balloon = newmem;
+ if (persistentDef->mem.cur_balloon > newmem)
+ persistentDef->mem.cur_balloon = newmem;
+ if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
+ goto cleanup;
+ }
+ } else {
+ unsigned long oldmax = 0;
- if (flags & VIR_DOMAIN_AFFECT_LIVE) {
- if (virCgroupSetMemory(priv->cgroup, newmem) < 0) {
- virReportError(VIR_ERR_OPERATION_FAILED,
- "%s", _("Failed to set memory for domain"));
- goto cleanup;
+ if (flags & VIR_DOMAIN_AFFECT_LIVE)
+ oldmax = vm->def->mem.max_balloon;
+ if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
+ if (!oldmax || oldmax > persistentDef->mem.max_balloon)
+ oldmax = persistentDef->mem.max_balloon;
}
- }
- if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
- sa_assert(persistentDef);
Well, since it has been here already, I think we can leave it in your
patch too.
- persistentDef->mem.cur_balloon = newmem;
- if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
+ if (newmem > oldmax) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ "%s", _("Cannot set memory higher than max
memory"));
goto cleanup;
+ }
+
+ if (flags & VIR_DOMAIN_AFFECT_LIVE) {
+ if (virCgroupSetMemory(priv->cgroup, newmem) < 0) {
+ virReportError(VIR_ERR_OPERATION_FAILED,
+ "%s", _("Failed to set memory for domain"));
+ goto cleanup;
+ }
+ }
+
+ if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
+ sa_assert(persistentDef);
+ persistentDef->mem.cur_balloon = newmem;
+ if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
+ goto cleanup;
+ }
}
ret = 0;
But what I miss in this patch is, what would:
virDomainSetMaxMemoryFlags(dom, newmem, VIR_DOMAIN_AFFECT_CURRENT |
VIR_DOMAIN_MEM_MAXIMUM)
do? I mean, the _CURRENT is not translated to _LIVE or _CONFIG anywhere
in the function.
Michal
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