SYSCALL_DEFINE3(fairsched_nodemask, unsigned int, id, unsigned int, len,
unsigned long __user *, user_mask_ptr)
{
struct cgroup *cgrp;
char name[16];
int retval;
nodemask_t new_mask, in_mask;
if (!capable_setveid())
return -EPERM;
if (id == 0)
return -EINVAL;
fairsched_name(name, sizeof(name), id);
cgrp = cgroup_kernel_open(fairsched_root, 0, name);
if (IS_ERR(cgrp))
return PTR_ERR(cgrp);
if (cgrp == NULL)
return -ENOENT;
retval = get_user_node_mask(user_mask_ptr, len, &in_mask);
if (retval == 0) {
nodes_and(new_mask, in_mask, node_states[N_HIGH_MEMORY]);
cgroup_lock();
retval = cgroup_set_nodemask(cgrp, &new_mask);
cgroup_unlock();
}
cgroup_kernel_close(cgrp);
return retval;
}
unsigned int __init dom0_max_vcpus(void)
{
unsigned int i, max_vcpus, limit;
nodeid_t node;
for ( i = 0; i < dom0_nr_pxms; ++i )
if ( (node = pxm_to_node(dom0_pxms[i])) != NUMA_NO_NODE )
node_set(node, dom0_nodes);
nodes_and(dom0_nodes, dom0_nodes, node_online_map);
if ( nodes_empty(dom0_nodes) )
dom0_nodes = node_online_map;
for_each_node_mask ( node, dom0_nodes )
cpumask_or(&dom0_cpus, &dom0_cpus, &node_to_cpumask(node));
cpumask_and(&dom0_cpus, &dom0_cpus, cpupool0->cpu_valid);
if ( cpumask_empty(&dom0_cpus) )
cpumask_copy(&dom0_cpus, cpupool0->cpu_valid);
max_vcpus = cpumask_weight(&dom0_cpus);
if ( opt_dom0_max_vcpus_min > max_vcpus )
max_vcpus = opt_dom0_max_vcpus_min;
if ( opt_dom0_max_vcpus_max < max_vcpus )
max_vcpus = opt_dom0_max_vcpus_max;
limit = dom0_pvh ? HVM_MAX_VCPUS : MAX_VIRT_CPUS;
if ( max_vcpus > limit )
max_vcpus = limit;
return max_vcpus;
}
