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Date: Mon, 19 Sep 2022 16:31:52 +0800
From: Liu Shixin <liushixin2@...wei.com>
To: Andrew Morton <akpm@...ux-foundation.org>
CC: <linux-kernel@...r.kernel.org>, Liu Shixin <liushixin2@...wei.com>,
"Kefeng Wang" <wangkefeng.wang@...wei.com>
Subject: [PATCH 9/9] memory: clean up hotplug memory callback priority
The priority of hotplug memory callback is defined in different file.
And there are some caller using number directly. Collect them together
into include/linux/memory.h for easy reading.
Signed-off-by: Liu Shixin <liushixin2@...wei.com>
---
drivers/acpi/numa/hmat.c | 2 +-
fs/proc/kcore.c | 2 +-
include/linux/memory-tiers.h | 1 -
include/linux/memory.h | 5 +++++
kernel/cgroup/cpuset.c | 2 +-
mm/kasan/shadow.c | 2 +-
mm/ksm.c | 2 +-
mm/mmap.c | 2 +-
mm/page_ext.c | 2 +-
9 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
index 84dffb3dc30e..47c7fae8b6de 100644
--- a/drivers/acpi/numa/hmat.c
+++ b/drivers/acpi/numa/hmat.c
@@ -850,7 +850,7 @@ static __init int hmat_init(void)
hmat_register_targets();
/* Keep the table and structures if the notifier may use them */
- if (!hotplug_memory_notifier(hmat_callback, 2))
+ if (!hotplug_memory_notifier(hmat_callback, HMAT_CALLBACK_PRI))
return 0;
out_put:
hmat_free_structures();
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 7692a360972d..98f3289556e4 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -689,7 +689,7 @@ static int __init proc_kcore_init(void)
add_modules_range();
/* Store direct-map area from physical memory map */
kcore_update_ram();
- hotplug_memory_notifier(kcore_callback, 0);
+ hotplug_memory_notifier(kcore_callback, DEFAULT_CALLBACK_PRI);
return 0;
}
diff --git a/include/linux/memory-tiers.h b/include/linux/memory-tiers.h
index 965009aa01d7..fc9647b1b4f9 100644
--- a/include/linux/memory-tiers.h
+++ b/include/linux/memory-tiers.h
@@ -18,7 +18,6 @@
* the same memory tier.
*/
#define MEMTIER_ADISTANCE_DRAM ((4 * MEMTIER_CHUNK_SIZE) + (MEMTIER_CHUNK_SIZE >> 1))
-#define MEMTIER_HOTPLUG_PRIO 100
struct memory_tier;
struct memory_dev_type {
diff --git a/include/linux/memory.h b/include/linux/memory.h
index e5f71d3d9af8..e62d6d2b9c39 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -112,8 +112,13 @@ struct mem_section;
* Priorities for the hotplug memory callback routines (stored in decreasing
* order in the callback chain)
*/
+#define DEFAULT_CALLBACK_PRI 0
#define SLAB_CALLBACK_PRI 1
+#define HMAT_CALLBACK_PRI 2
#define MM_BATCH_CALLBACK_PRI 10
+#define CPUSET_CALLBACK_PRI 10
+#define MEMTIER_HOTPLUG_PRIO 100
+#define KSM_CALLBACK_PRI 100
#ifndef CONFIG_MEMORY_HOTPLUG
static inline void memory_dev_init(void)
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 0c6db6a4f427..3ea2e836e93e 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -3647,7 +3647,7 @@ void __init cpuset_init_smp(void)
cpumask_copy(top_cpuset.effective_cpus, cpu_active_mask);
top_cpuset.effective_mems = node_states[N_MEMORY];
- hotplug_memory_notifier(cpuset_track_online_nodes, 10);
+ hotplug_memory_notifier(cpuset_track_online_nodes, CPUSET_CALLBACK_PRI);
cpuset_migrate_mm_wq = alloc_ordered_workqueue("cpuset_migrate_mm", 0);
BUG_ON(!cpuset_migrate_mm_wq);
diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c
index 0e3648b603a6..2fba1f51f042 100644
--- a/mm/kasan/shadow.c
+++ b/mm/kasan/shadow.c
@@ -244,7 +244,7 @@ static int __meminit kasan_mem_notifier(struct notifier_block *nb,
static int __init kasan_memhotplug_init(void)
{
- hotplug_memory_notifier(kasan_mem_notifier, 0);
+ hotplug_memory_notifier(kasan_mem_notifier, DEFAULT_CALLBACK_PRI);
return 0;
}
diff --git a/mm/ksm.c b/mm/ksm.c
index c19fcca9bc03..7ba97f86d831 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -3211,7 +3211,7 @@ static int __init ksm_init(void)
#ifdef CONFIG_MEMORY_HOTREMOVE
/* There is no significance to this priority 100 */
- hotplug_memory_notifier(ksm_memory_callback, 100);
+ hotplug_memory_notifier(ksm_memory_callback, KSM_CALLBACK_PRI);
#endif
return 0;
diff --git a/mm/mmap.c b/mm/mmap.c
index 87ec40e00e2a..90e8718f0fe7 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3747,7 +3747,7 @@ static int reserve_mem_notifier(struct notifier_block *nb,
static int __meminit init_reserve_notifier(void)
{
- if (hotplug_memory_notifier(&reserve_mem_notifier, 0))
+ if (hotplug_memory_notifier(&reserve_mem_notifier, DEFAULT_CALLBACK_PRI))
pr_err("Failed registering memory add/remove notifier for admin reserve\n");
return 0;
diff --git a/mm/page_ext.c b/mm/page_ext.c
index affe80243b6d..b2ff5c9129f4 100644
--- a/mm/page_ext.c
+++ b/mm/page_ext.c
@@ -513,7 +513,7 @@ void __init page_ext_init(void)
cond_resched();
}
}
- hotplug_memory_notifier(page_ext_callback, 0);
+ hotplug_memory_notifier(page_ext_callback, DEFAULT_CALLBACK_PRI);
pr_info("allocated %ld bytes of page_ext\n", total_usage);
invoke_init_callbacks();
return;
--
2.25.1
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