diff mbox series

[v9,1/8] drivers/base/memory: Introduce memory_block_{online,offline}

Message ID 20210416112411.9826-2-osalvador@suse.de (mailing list archive)
State New, archived
Headers show
Series [v9,1/8] drivers/base/memory: Introduce memory_block_{online,offline} | expand

Commit Message

Oscar Salvador April 16, 2021, 11:24 a.m. UTC 
This is a preparatory patch that introduces two new functions:
memory_block_online() and memory_block_offline().

For now, these functions will only call online_pages() and offline_pages()
respectively, but they will be later in charge of preparing the vmemmap
pages, carrying out the initialization and proper accounting of such
pages.

Since memory_block struct contains all the information, pass this struct
down the chain till the end functions.

Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
---
 drivers/base/memory.c | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

Comments

Michal Hocko April 20, 2021, 9:23 a.m. UTC | #1 
On Fri 16-04-21 13:24:04, Oscar Salvador wrote:
> This is a preparatory patch that introduces two new functions:
> memory_block_online() and memory_block_offline().
> 
> For now, these functions will only call online_pages() and offline_pages()
> respectively, but they will be later in charge of preparing the vmemmap
> pages, carrying out the initialization and proper accounting of such
> pages.
> 
> Since memory_block struct contains all the information, pass this struct
> down the chain till the end functions.
> 
> Signed-off-by: Oscar Salvador <osalvador@suse.de>
> Reviewed-by: David Hildenbrand <david@redhat.com>

Acked-by: Michal Hocko <mhocko@suse.com>

> ---
>  drivers/base/memory.c | 33 +++++++++++++++++++++------------
>  1 file changed, 21 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index f35298425575..f209925a5d4e 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -169,30 +169,41 @@ int memory_notify(unsigned long val, void *v)
>  	return blocking_notifier_call_chain(&memory_chain, val, v);
>  }
>  
> +static int memory_block_online(struct memory_block *mem)
> +{
> +	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
> +	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
> +
> +	return online_pages(start_pfn, nr_pages, mem->online_type, mem->nid);
> +}
> +
> +static int memory_block_offline(struct memory_block *mem)
> +{
> +	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
> +	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
> +
> +	return offline_pages(start_pfn, nr_pages);
> +}
> +
>  /*
>   * MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is
>   * OK to have direct references to sparsemem variables in here.
>   */
>  static int
> -memory_block_action(unsigned long start_section_nr, unsigned long action,
> -		    int online_type, int nid)
> +memory_block_action(struct memory_block *mem, unsigned long action)
>  {
> -	unsigned long start_pfn;
> -	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
>  	int ret;
>  
> -	start_pfn = section_nr_to_pfn(start_section_nr);
> -
>  	switch (action) {
>  	case MEM_ONLINE:
> -		ret = online_pages(start_pfn, nr_pages, online_type, nid);
> +		ret = memory_block_online(mem);
>  		break;
>  	case MEM_OFFLINE:
> -		ret = offline_pages(start_pfn, nr_pages);
> +		ret = memory_block_offline(mem);
>  		break;
>  	default:
>  		WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: "
> -		     "%ld\n", __func__, start_section_nr, action, action);
> +		     "%ld\n", __func__, mem->start_section_nr, action, action);
>  		ret = -EINVAL;
>  	}
>  
> @@ -210,9 +221,7 @@ static int memory_block_change_state(struct memory_block *mem,
>  	if (to_state == MEM_OFFLINE)
>  		mem->state = MEM_GOING_OFFLINE;
>  
> -	ret = memory_block_action(mem->start_section_nr, to_state,
> -				  mem->online_type, mem->nid);
> -
> +	ret = memory_block_action(mem, to_state);
>  	mem->state = ret ? from_state_req : to_state;
>  
>  	return ret;
> -- 
> 2.16.3
diff mbox series

Patch

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index f35298425575..f209925a5d4e 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -169,30 +169,41 @@  int memory_notify(unsigned long val, void *v)
 	return blocking_notifier_call_chain(&memory_chain, val, v);
 }
 
+static int memory_block_online(struct memory_block *mem)
+{
+	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
+	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
+
+	return online_pages(start_pfn, nr_pages, mem->online_type, mem->nid);
+}
+
+static int memory_block_offline(struct memory_block *mem)
+{
+	unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
+	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
+
+	return offline_pages(start_pfn, nr_pages);
+}
+
 /*
  * MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is
  * OK to have direct references to sparsemem variables in here.
  */
 static int
-memory_block_action(unsigned long start_section_nr, unsigned long action,
-		    int online_type, int nid)
+memory_block_action(struct memory_block *mem, unsigned long action)
 {
-	unsigned long start_pfn;
-	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
 	int ret;
 
-	start_pfn = section_nr_to_pfn(start_section_nr);
-
 	switch (action) {
 	case MEM_ONLINE:
-		ret = online_pages(start_pfn, nr_pages, online_type, nid);
+		ret = memory_block_online(mem);
 		break;
 	case MEM_OFFLINE:
-		ret = offline_pages(start_pfn, nr_pages);
+		ret = memory_block_offline(mem);
 		break;
 	default:
 		WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: "
-		     "%ld\n", __func__, start_section_nr, action, action);
+		     "%ld\n", __func__, mem->start_section_nr, action, action);
 		ret = -EINVAL;
 	}
 
@@ -210,9 +221,7 @@  static int memory_block_change_state(struct memory_block *mem,
 	if (to_state == MEM_OFFLINE)
 		mem->state = MEM_GOING_OFFLINE;
 
-	ret = memory_block_action(mem->start_section_nr, to_state,
-				  mem->online_type, mem->nid);
-
+	ret = memory_block_action(mem, to_state);
 	mem->state = ret ? from_state_req : to_state;
 
 	return ret;