On Thu, Aug 2, 2012 at 10:52 AM, Lai Jiangshan <laijs@xxxxxxxxxxxxxx> wrote:
> 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.
>
As described in the change log of 01/23, N_MEMORY is introduced to be
alias of N_HIGH_MEMORY, but the above sounds like you are correcting
the usage of N_HIGH_MEMORY.
> Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
> ---
Other than that,
Acked-by: Hillf Danton <dhillf@xxxxxxxxx>
> 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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