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Subject[RFC PATCH 02/23 V2] cpuset: use N_MEMORY instead N_HIGH_MEMORY
Date
N_HIGH_MEMORY stands for the nodes that has normal or high memory.
N_MEMORY stands for the nodes that has any memory.

The code here need to handle with the nodes which have memory, we should
use N_MEMORY instead.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
Documentation/cgroups/cpusets.txt | 2 +-
include/linux/cpuset.h | 2 +-
kernel/cpuset.c | 32 ++++++++++++++++----------------
3 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/Documentation/cgroups/cpusets.txt b/Documentation/cgroups/cpusets.txt
index cefd3d8..12e01d4 100644
--- a/Documentation/cgroups/cpusets.txt
+++ b/Documentation/cgroups/cpusets.txt
@@ -218,7 +218,7 @@ and name space for cpusets, with a minimum of additional kernel code.
The cpus and mems files in the root (top_cpuset) cpuset are
read-only. The cpus file automatically tracks the value of
cpu_online_mask using a CPU hotplug notifier, and the mems file
-automatically tracks the value of node_states[N_HIGH_MEMORY]--i.e.,
+automatically tracks the value of node_states[N_MEMORY]--i.e.,
nodes with memory--using the cpuset_track_online_nodes() hook.


diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index 838320f..8c8a60d 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -144,7 +144,7 @@ static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
return node_possible_map;
}

-#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
+#define cpuset_current_mems_allowed (node_states[N_MEMORY])
static inline void cpuset_init_current_mems_allowed(void) {}

static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index f33c715..2b133db 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -302,10 +302,10 @@ static void guarantee_online_cpus(const struct cpuset *cs,
* are online, with memory. If none are online with memory, walk
* up the cpuset hierarchy until we find one that does have some
* online mems. If we get all the way to the top and still haven't
- * found any online mems, return node_states[N_HIGH_MEMORY].
+ * found any online mems, return node_states[N_MEMORY].
*
* One way or another, we guarantee to return some non-empty subset
- * of node_states[N_HIGH_MEMORY].
+ * of node_states[N_MEMORY].
*
* Call with callback_mutex held.
*/
@@ -313,14 +313,14 @@ static void guarantee_online_cpus(const struct cpuset *cs,
static void guarantee_online_mems(const struct cpuset *cs, nodemask_t *pmask)
{
while (cs && !nodes_intersects(cs->mems_allowed,
- node_states[N_HIGH_MEMORY]))
+ node_states[N_MEMORY]))
cs = cs->parent;
if (cs)
nodes_and(*pmask, cs->mems_allowed,
- node_states[N_HIGH_MEMORY]);
+ node_states[N_MEMORY]);
else
- *pmask = node_states[N_HIGH_MEMORY];
- BUG_ON(!nodes_intersects(*pmask, node_states[N_HIGH_MEMORY]));
+ *pmask = node_states[N_MEMORY];
+ BUG_ON(!nodes_intersects(*pmask, node_states[N_MEMORY]));
}

/*
@@ -1100,7 +1100,7 @@ static int update_nodemask(struct cpuset *cs, struct cpuset *trialcs,
return -ENOMEM;

/*
- * top_cpuset.mems_allowed tracks node_stats[N_HIGH_MEMORY];
+ * top_cpuset.mems_allowed tracks node_stats[N_MEMORY];
* it's read-only
*/
if (cs == &top_cpuset) {
@@ -1122,7 +1122,7 @@ static int update_nodemask(struct cpuset *cs, struct cpuset *trialcs,
goto done;

if (!nodes_subset(trialcs->mems_allowed,
- node_states[N_HIGH_MEMORY])) {
+ node_states[N_MEMORY])) {
retval = -EINVAL;
goto done;
}
@@ -2034,7 +2034,7 @@ static struct cpuset *cpuset_next(struct list_head *queue)
* before dropping down to the next. It always processes a node before
* any of its children.
*
- * In the case of memory hot-unplug, it will remove nodes from N_HIGH_MEMORY
+ * In the case of memory hot-unplug, it will remove nodes from N_MEMORY
* if all present pages from a node are offlined.
*/
static void
@@ -2073,7 +2073,7 @@ scan_cpusets_upon_hotplug(struct cpuset *root, enum hotplug_event event)

/* Continue past cpusets with all mems online */
if (nodes_subset(cp->mems_allowed,
- node_states[N_HIGH_MEMORY]))
+ node_states[N_MEMORY]))
continue;

oldmems = cp->mems_allowed;
@@ -2081,7 +2081,7 @@ scan_cpusets_upon_hotplug(struct cpuset *root, enum hotplug_event event)
/* Remove offline mems from this cpuset. */
mutex_lock(&callback_mutex);
nodes_and(cp->mems_allowed, cp->mems_allowed,
- node_states[N_HIGH_MEMORY]);
+ node_states[N_MEMORY]);
mutex_unlock(&callback_mutex);

/* Move tasks from the empty cpuset to a parent */
@@ -2134,8 +2134,8 @@ void cpuset_update_active_cpus(bool cpu_online)

#ifdef CONFIG_MEMORY_HOTPLUG
/*
- * Keep top_cpuset.mems_allowed tracking node_states[N_HIGH_MEMORY].
- * Call this routine anytime after node_states[N_HIGH_MEMORY] changes.
+ * Keep top_cpuset.mems_allowed tracking node_states[N_MEMORY].
+ * Call this routine anytime after node_states[N_MEMORY] changes.
* See cpuset_update_active_cpus() for CPU hotplug handling.
*/
static int cpuset_track_online_nodes(struct notifier_block *self,
@@ -2148,7 +2148,7 @@ static int cpuset_track_online_nodes(struct notifier_block *self,
case MEM_ONLINE:
oldmems = top_cpuset.mems_allowed;
mutex_lock(&callback_mutex);
- top_cpuset.mems_allowed = node_states[N_HIGH_MEMORY];
+ top_cpuset.mems_allowed = node_states[N_MEMORY];
mutex_unlock(&callback_mutex);
update_tasks_nodemask(&top_cpuset, &oldmems, NULL);
break;
@@ -2177,7 +2177,7 @@ static int cpuset_track_online_nodes(struct notifier_block *self,
void __init cpuset_init_smp(void)
{
cpumask_copy(top_cpuset.cpus_allowed, cpu_active_mask);
- top_cpuset.mems_allowed = node_states[N_HIGH_MEMORY];
+ top_cpuset.mems_allowed = node_states[N_MEMORY];

hotplug_memory_notifier(cpuset_track_online_nodes, 10);

@@ -2245,7 +2245,7 @@ void cpuset_init_current_mems_allowed(void)
*
* Description: Returns the nodemask_t mems_allowed of the cpuset
* attached to the specified @tsk. Guaranteed to return some non-empty
- * subset of node_states[N_HIGH_MEMORY], even if this means going outside the
+ * subset of node_states[N_MEMORY], even if this means going outside the
* tasks cpuset.
**/

--
1.7.1


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