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-rw-r--r--mm/hugetlb.c58
1 files changed, 26 insertions, 32 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e84d22ce5de8..7a0fcb33973e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1734,21 +1734,13 @@ static ssize_t nr_hugepages_show_common(struct kobject *kobj,
return sprintf(buf, "%lu\n", nr_huge_pages);
}
-static ssize_t nr_hugepages_store_common(bool obey_mempolicy,
- struct kobject *kobj, struct kobj_attribute *attr,
- const char *buf, size_t len)
+static ssize_t __nr_hugepages_store_common(bool obey_mempolicy,
+ struct hstate *h, int nid,
+ unsigned long count, size_t len)
{
int err;
- int nid;
- unsigned long count;
- struct hstate *h;
NODEMASK_ALLOC(nodemask_t, nodes_allowed, GFP_KERNEL | __GFP_NORETRY);
- err = kstrtoul(buf, 10, &count);
- if (err)
- goto out;
-
- h = kobj_to_hstate(kobj, &nid);
if (hstate_is_gigantic(h) && !gigantic_page_supported()) {
err = -EINVAL;
goto out;
@@ -1784,6 +1776,23 @@ out:
return err;
}
+static ssize_t nr_hugepages_store_common(bool obey_mempolicy,
+ struct kobject *kobj, const char *buf,
+ size_t len)
+{
+ struct hstate *h;
+ unsigned long count;
+ int nid;
+ int err;
+
+ err = kstrtoul(buf, 10, &count);
+ if (err)
+ return err;
+
+ h = kobj_to_hstate(kobj, &nid);
+ return __nr_hugepages_store_common(obey_mempolicy, h, nid, count, len);
+}
+
static ssize_t nr_hugepages_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@@ -1793,7 +1802,7 @@ static ssize_t nr_hugepages_show(struct kobject *kobj,
static ssize_t nr_hugepages_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t len)
{
- return nr_hugepages_store_common(false, kobj, attr, buf, len);
+ return nr_hugepages_store_common(false, kobj, buf, len);
}
HSTATE_ATTR(nr_hugepages);
@@ -1812,7 +1821,7 @@ static ssize_t nr_hugepages_mempolicy_show(struct kobject *kobj,
static ssize_t nr_hugepages_mempolicy_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t len)
{
- return nr_hugepages_store_common(true, kobj, attr, buf, len);
+ return nr_hugepages_store_common(true, kobj, buf, len);
}
HSTATE_ATTR(nr_hugepages_mempolicy);
#endif
@@ -2248,36 +2257,21 @@ static int hugetlb_sysctl_handler_common(bool obey_mempolicy,
void __user *buffer, size_t *length, loff_t *ppos)
{
struct hstate *h = &default_hstate;
- unsigned long tmp;
+ unsigned long tmp = h->max_huge_pages;
int ret;
if (!hugepages_supported())
return -ENOTSUPP;
- tmp = h->max_huge_pages;
-
- if (write && hstate_is_gigantic(h) && !gigantic_page_supported())
- return -EINVAL;
-
table->data = &tmp;
table->maxlen = sizeof(unsigned long);
ret = proc_doulongvec_minmax(table, write, buffer, length, ppos);
if (ret)
goto out;
- if (write) {
- NODEMASK_ALLOC(nodemask_t, nodes_allowed,
- GFP_KERNEL | __GFP_NORETRY);
- if (!(obey_mempolicy &&
- init_nodemask_of_mempolicy(nodes_allowed))) {
- NODEMASK_FREE(nodes_allowed);
- nodes_allowed = &node_states[N_MEMORY];
- }
- h->max_huge_pages = set_max_huge_pages(h, tmp, nodes_allowed);
-
- if (nodes_allowed != &node_states[N_MEMORY])
- NODEMASK_FREE(nodes_allowed);
- }
+ if (write)
+ ret = __nr_hugepages_store_common(obey_mempolicy, h,
+ NUMA_NO_NODE, tmp, *length);
out:
return ret;
}