Hi all,
Would you please help to review these two patches ?
Thanks.
On 06/06/2014 01:33 PM, Tang Chen wrote:
In store_mem_state(), we have:
......
334 else if (!strncmp(buf, "offline", min_t(int, count, 7)))
335 online_type = -1;
......
355 case -1:
356 ret = device_offline(&mem->dev);
357 break;
......
Here, "offline" is hard coded as -1.
This patch does the following renaming:
ONLINE_KEEP -> MMOP_ONLINE_KEEP
ONLINE_KERNEL -> MMOP_ONLINE_KERNEL
ONLINE_MOVABLE -> MMOP_ONLINE_MOVABLE
and introduce MMOP_OFFLINE = -1 to avoid hard coding.
Signed-off-by: Tang Chen<tangchen@xxxxxxxxxxxxxx>
---
drivers/base/memory.c | 18 +++++++++---------
include/linux/memory_hotplug.h | 9 +++++----
mm/memory_hotplug.c | 9 ++++++---
3 files changed, 20 insertions(+), 16 deletions(-)
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index fa664b9..904442c 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -294,7 +294,7 @@ static int memory_subsys_online(struct device *dev)
* attribute and need to set the online_type.
*/
if (mem->online_type< 0)
- mem->online_type = ONLINE_KEEP;
+ mem->online_type = MMOP_ONLINE_KEEP;
ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE);
@@ -326,22 +326,22 @@ store_mem_state(struct device *dev,
return ret;
if (sysfs_streq(buf, "online_kernel"))
- online_type = ONLINE_KERNEL;
+ online_type = MMOP_ONLINE_KERNEL;
else if (sysfs_streq(buf, "online_movable"))
- online_type = ONLINE_MOVABLE;
+ online_type = MMOP_ONLINE_MOVABLE;
else if (sysfs_streq(buf, "online"))
- online_type = ONLINE_KEEP;
+ online_type = MMOP_ONLINE_KEEP;
else if (sysfs_streq(buf, "offline"))
- online_type = -1;
+ online_type = MMOP_OFFLINE;
else {
ret = -EINVAL;
goto err;
}
switch (online_type) {
- case ONLINE_KERNEL:
- case ONLINE_MOVABLE:
- case ONLINE_KEEP:
+ case MMOP_ONLINE_KERNEL:
+ case MMOP_ONLINE_MOVABLE:
+ case MMOP_ONLINE_KEEP:
/*
* mem->online_type is not protected so there can be a
* race here. However, when racing online, the first
@@ -352,7 +352,7 @@ store_mem_state(struct device *dev,
mem->online_type = online_type;
ret = device_online(&mem->dev);
break;
- case -1:
+ case MMOP_OFFLINE:
ret = device_offline(&mem->dev);
break;
default:
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 4ca3d95..b4240cf 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -26,11 +26,12 @@ enum {
MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,
};
-/* Types for control the zone type of onlined memory */
+/* Types for control the zone type of onlined and offlined memory */
enum {
- ONLINE_KEEP,
- ONLINE_KERNEL,
- ONLINE_MOVABLE,
+ MMOP_OFFLINE = -1,
+ MMOP_ONLINE_KEEP,
+ MMOP_ONLINE_KERNEL,
+ MMOP_ONLINE_MOVABLE,
};
/*
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index a650db2..6075f04 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -907,19 +907,22 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
*/
zone = page_zone(pfn_to_page(pfn));
- if ((zone_idx(zone)> ZONE_NORMAL || online_type == ONLINE_MOVABLE)&&
+ if ((zone_idx(zone)> ZONE_NORMAL ||
+ online_type == MMOP_ONLINE_MOVABLE)&&
!can_online_high_movable(zone)) {
unlock_memory_hotplug();
return -EINVAL;
}
- if (online_type == ONLINE_KERNEL&& zone_idx(zone) == ZONE_MOVABLE) {
+ if (online_type == MMOP_ONLINE_KERNEL&&
+ zone_idx(zone) == ZONE_MOVABLE) {
if (move_pfn_range_left(zone - 1, zone, pfn, pfn + nr_pages)) {
unlock_memory_hotplug();
return -EINVAL;
}
}
- if (online_type == ONLINE_MOVABLE&& zone_idx(zone) == ZONE_MOVABLE - 1) {
+ if (online_type == MMOP_ONLINE_MOVABLE&&
+ zone_idx(zone) == ZONE_MOVABLE - 1) {
if (move_pfn_range_right(zone, zone + 1, pfn, pfn + nr_pages)) {
unlock_memory_hotplug();
return -EINVAL;
--
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