External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2025-02-22 03:12:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

Balloon dom0 in libxl driver

Browse Source 
Creating a domU on a freshly booted dom0 does not work,
because the libxl driver does not allocate memory for the domU.
After creating a domain with xl libvirt is able to create domains too.
This patch reserves enough memory for the domU first.
This commit is contained in:
Markus Groß 2011-05-04 12:17:06 +02:00 committed by Jim Fehlig
parent e697216527
commit 0d9936f622
1 changed files with 46 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
src/libxl/libxl_driver.c
View File

@ -498,6 +498,46 @@ cleanup:
return ret;
}
static int
libxlFreeMem(libxlDomainObjPrivatePtr priv, libxl_domain_config *d_config)
{
uint32_t needed_mem;
uint32_t free_mem;
int i;
int ret = -1;
int tries = 3;
int wait_secs = 10;
if ((ret = libxl_domain_need_memory(&priv->ctx, &d_config->b_info,
&d_config->dm_info,
&needed_mem)) >= 0) {
for (i = 0; i < tries; ++i) {
if ((ret = libxl_get_free_memory(&priv->ctx, &free_mem)) < 0)
break;
if (free_mem >= needed_mem) {
ret = 0;
break;
}
if ((ret = libxl_set_memory_target(&priv->ctx, 0,
free_mem - needed_mem,
/* relative */ 1, 0)) < 0)
break;
ret = libxl_wait_for_free_memory(&priv->ctx, 0, needed_mem,
wait_secs);
if (ret == 0 || ret != ERROR_NOMEM)
break;
if ((ret = libxl_wait_for_memory_target(&priv->ctx, 0, 1)) < 0)
break;
}
}
return ret;
}
/*
* Start a domain through libxenlight.
*
@ -521,8 +561,12 @@ libxlVmStart(libxlDriverPrivatePtr driver,
if (libxlBuildDomainConfig(driver, def, &d_config) < 0 )
return -1;
//TODO: Balloon dom0 ??
//ret = freemem(&d_config->b_info, &d_config->dm_info);
if (libxlFreeMem(priv, &d_config) < 0) {
libxlError(VIR_ERR_INTERNAL_ERROR,
_("libxenlight failed to get free memory for domain '%s'"),
d_config.c_info.name);
goto error;
}
ret = libxl_domain_create_new(&priv->ctx, &d_config,
NULL, &child_console_pid, &domid);