* to the last. It would be better if bind would truly restrict
* the allocation to memory nodes instead
*
- * preferred Try a specific node first before normal fallback.
+ * preferred Try a specific node first before normal fallback.
* As a special case NUMA_NO_NODE here means do the allocation
* on the local CPU. This is normally identical to default,
* but useful to set in a VMA when you have a non default
* on systems with highmem kernel lowmem allocation don't get policied.
* Same with GFP_DMA allocations.
*
- * For shmfs/tmpfs/hugetlbfs shared memory the policy is shared between
+ * For shmem/tmpfs shared memory the policy is shared between
* all users and remembered even when nobody has memory mapped.
*/
return ERR_PTR(-EINVAL);
} else if (nodes_empty(*nodes))
return ERR_PTR(-EINVAL);
+
policy = kmem_cache_alloc(policy_cache, GFP_KERNEL);
if (!policy)
return ERR_PTR(-ENOMEM);
}
/* Slow path of a mpol destructor. */
-void __mpol_put(struct mempolicy *p)
+void __mpol_put(struct mempolicy *pol)
{
- if (!atomic_dec_and_test(&p->refcnt))
+ if (!atomic_dec_and_test(&pol->refcnt))
return;
- kmem_cache_free(policy_cache, p);
+ kmem_cache_free(policy_cache, pol);
}
static void mpol_rebind_default(struct mempolicy *pol, const nodemask_t *nodes)
*
* Called with task's alloc_lock held.
*/
-
void mpol_rebind_task(struct task_struct *tsk, const nodemask_t *new)
{
mpol_rebind_policy(tsk->mempolicy, new);
*
* Call holding a reference to mm. Takes mm->mmap_lock during call.
*/
-
void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new)
{
struct vm_area_struct *vma;
* This must be called with the mmap_lock held for writing.
*/
static int vma_replace_policy(struct vm_area_struct *vma,
- struct mempolicy *pol)
+ struct mempolicy *pol)
{
int err;
struct mempolicy *old;
vmstart = vma->vm_start;
}
- if (mpol_equal(vma_policy(vma), new_pol)) {
+ if (mpol_equal(vma->vm_policy, new_pol)) {
*prev = vma;
return 0;
}
*
* Called with task's alloc_lock held
*/
-static void get_policy_nodemask(struct mempolicy *p, nodemask_t *nodes)
+static void get_policy_nodemask(struct mempolicy *pol, nodemask_t *nodes)
{
nodes_clear(*nodes);
- if (p == &default_policy)
+ if (pol == &default_policy)
return;
- switch (p->mode) {
+ switch (pol->mode) {
case MPOL_BIND:
case MPOL_INTERLEAVE:
case MPOL_PREFERRED:
case MPOL_PREFERRED_MANY:
- *nodes = p->nodes;
+ *nodes = pol->nodes;
break;
case MPOL_LOCAL:
/* return empty node mask for local allocation */
out_put:
put_task_struct(task);
goto out;
-
}
SYSCALL_DEFINE4(migrate_pages, pid_t, pid, unsigned long, maxnode,
return kernel_migrate_pages(pid, maxnode, old_nodes, new_nodes);
}
-
/* Retrieve NUMA policy */
static int kernel_get_mempolicy(int __user *policy,
unsigned long __user *nmask,
* policy_node() is always coupled with policy_nodemask(), which
* secures the nodemask limit for 'bind' and 'prefer-many' policy.
*/
-static int policy_node(gfp_t gfp, struct mempolicy *policy, int nd)
+static int policy_node(gfp_t gfp, struct mempolicy *policy, int nid)
{
if (policy->mode == MPOL_PREFERRED) {
- nd = first_node(policy->nodes);
+ nid = first_node(policy->nodes);
} else {
/*
* __GFP_THISNODE shouldn't even be used with the bind policy
policy->home_node != NUMA_NO_NODE)
return policy->home_node;
- return nd;
+ return nid;
}
/* Do dynamic interleaving for a process */
-static unsigned interleave_nodes(struct mempolicy *policy)
+static unsigned int interleave_nodes(struct mempolicy *policy)
{
- unsigned next;
- struct task_struct *me = current;
+ unsigned int nid;
- next = next_node_in(me->il_prev, policy->nodes);
- if (next < MAX_NUMNODES)
- me->il_prev = next;
- return next;
+ nid = next_node_in(current->il_prev, policy->nodes);
+ if (nid < MAX_NUMNODES)
+ current->il_prev = nid;
+ return nid;
}
/*
int vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst)
{
- struct mempolicy *pol = mpol_dup(vma_policy(src));
+ struct mempolicy *pol = mpol_dup(src->vm_policy);
if (IS_ERR(pol))
return PTR_ERR(pol);
}
}
-int mpol_set_shared_policy(struct shared_policy *info,
- struct vm_area_struct *vma, struct mempolicy *npol)
+int mpol_set_shared_policy(struct shared_policy *sp,
+ struct vm_area_struct *vma, struct mempolicy *pol)
{
int err;
struct sp_node *new = NULL;
unsigned long sz = vma_pages(vma);
- if (npol) {
- new = sp_alloc(vma->vm_pgoff, vma->vm_pgoff + sz, npol);
+ if (pol) {
+ new = sp_alloc(vma->vm_pgoff, vma->vm_pgoff + sz, pol);
if (!new)
return -ENOMEM;
}
- err = shared_policy_replace(info, vma->vm_pgoff, vma->vm_pgoff+sz, new);
+ err = shared_policy_replace(sp, vma->vm_pgoff, vma->vm_pgoff + sz, new);
if (err && new)
sp_free(new);
return err;
}
/* Free a backing policy store on inode delete. */
-void mpol_free_shared_policy(struct shared_policy *p)
+void mpol_free_shared_policy(struct shared_policy *sp)
{
struct sp_node *n;
struct rb_node *next;
- if (!p->root.rb_node)
+ if (!sp->root.rb_node)
return;
- write_lock(&p->lock);
- next = rb_first(&p->root);
+ write_lock(&sp->lock);
+ next = rb_first(&sp->root);
while (next) {
n = rb_entry(next, struct sp_node, nd);
next = rb_next(&n->nd);
- sp_delete(p, n);
+ sp_delete(sp, n);
}
- write_unlock(&p->lock);
+ write_unlock(&sp->lock);
}
#ifdef CONFIG_NUMA_BALANCING
}
#endif /* CONFIG_NUMA_BALANCING */
-/* assumes fs == KERNEL_DS */
void __init numa_policy_init(void)
{
nodemask_t interleave_nodes;
/*
* Parse and format mempolicy from/to strings
*/
-
static const char * const policy_modes[] =
{
[MPOL_DEFAULT] = "default",
[MPOL_PREFERRED_MANY] = "prefer (many)",
};
-
#ifdef CONFIG_TMPFS
/**
* mpol_parse_str - parse string to mempolicy, for tmpfs mpol mount option.
projects / linux-2.6-microblaze.git / blobdiff