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LXC implement memory control APIs

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The patch implements the missing memory control APIs for lxc, i.e.,
domainGetMaxMemory, domainSetMaxMemory, domainSetMemory, and improves
domainGetInfo to return proper amount of used memory via cgroup.

* src/libvirt_private.syms: Export virCgroupGetMemoryUsage
  and add missing virCgroupSetMemory
* src/lxc/lxc_driver.c: Implement missing memory functions
* src/util/cgroup.c, src/util/cgroup.h: Add the function
  to get used memory
This commit is contained in:
Ryota Ozaki
2009-10-07 15:26:23 +02:00
committed by Daniel Veillard
parent 709c37e932
commit 3a05dc09ec
4 changed files with 140 additions and 5 deletions
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20
src/util/cgroup.c
View File

@@ -701,6 +701,26 @@ int virCgroupSetMemory(virCgroupPtr group, unsigned long kb)
kb << 10);
}
/**
* virCgroupGetMemoryUsage:
*
* @group: The cgroup to change memory for
* @kb: Pointer to returned used memory in kilobytes
*
* Returns: 0 on success
*/
int virCgroupGetMemoryUsage(virCgroupPtr group, unsigned long *kb)
{
uint64_t usage_in_bytes;
int ret;
ret = virCgroupGetValueU64(group,
VIR_CGROUP_CONTROLLER_MEMORY,
"memory.usage_in_bytes", &usage_in_bytes);
if (ret == 0)
*kb = (unsigned long) usage_in_bytes >> 10;
return ret;
}
/**
* virCgroupDenyAllDevices:
*

1
src/util/cgroup.h
View File

@@ -41,6 +41,7 @@ int virCgroupForDomain(virCgroupPtr driver,
int virCgroupAddTask(virCgroupPtr group, pid_t pid);
int virCgroupSetMemory(virCgroupPtr group, unsigned long kb);
int virCgroupGetMemoryUsage(virCgroupPtr group, unsigned long *kb);
int virCgroupDenyAllDevices(virCgroupPtr group);