lkml.org 
[lkml]   [2020]   [Jan]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v1 1/2] mm/memory_hotplug: pass in nid to online_pages()
Date
No need to lookup the memory block, we can directly pass in the nid.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
drivers/base/memory.c | 6 +++---
include/linux/memory_hotplug.h | 3 ++-
mm/memory_hotplug.c | 13 ++-----------
3 files changed, 7 insertions(+), 15 deletions(-)

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 2604a15c728b..2cf3542b04d0 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -236,7 +236,7 @@ static bool pages_correctly_probed(unsigned long start_pfn)
*/
static int
memory_block_action(unsigned long start_section_nr, unsigned long action,
- int online_type)
+ int online_type, int nid)
{
unsigned long start_pfn;
unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
@@ -249,7 +249,7 @@ memory_block_action(unsigned long start_section_nr, unsigned long action,
if (!pages_correctly_probed(start_pfn))
return -EBUSY;

- ret = online_pages(start_pfn, nr_pages, online_type);
+ ret = online_pages(start_pfn, nr_pages, online_type, nid);
break;
case MEM_OFFLINE:
ret = offline_pages(start_pfn, nr_pages);
@@ -275,7 +275,7 @@ static int memory_block_change_state(struct memory_block *mem,
mem->state = MEM_GOING_OFFLINE;

ret = memory_block_action(mem->start_section_nr, to_state,
- mem->online_type);
+ mem->online_type, mem->nid);

mem->state = ret ? from_state_req : to_state;

diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 820689093894..f4d59155f3d4 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -94,7 +94,8 @@ extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages);
extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages);
extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
/* VM interface that may be used by firmware interface */
-extern int online_pages(unsigned long, unsigned long, int);
+extern int online_pages(unsigned long pfn, unsigned long nr_pages,
+ int online_type, int nid);
extern struct zone *test_pages_in_a_zone(unsigned long start_pfn,
unsigned long end_pfn);
extern unsigned long __offline_isolated_pages(unsigned long start_pfn,
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 5ee2c6e10934..fb1c878d054d 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -758,27 +758,18 @@ struct zone * zone_for_pfn_range(int online_type, int nid, unsigned start_pfn,
return default_zone_for_pfn(nid, start_pfn, nr_pages);
}

-int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_type)
+int __ref online_pages(unsigned long pfn, unsigned long nr_pages,
+ int online_type, int nid)
{
unsigned long flags;
unsigned long onlined_pages = 0;
struct zone *zone;
int need_zonelists_rebuild = 0;
- int nid;
int ret;
struct memory_notify arg;
- struct memory_block *mem;

mem_hotplug_begin();

- /*
- * We can't use pfn_to_nid() because nid might be stored in struct page
- * which is not yet initialized. Instead, we find nid from memory block.
- */
- mem = find_memory_block(__pfn_to_section(pfn));
- nid = mem->nid;
- put_device(&mem->dev);
-
/* associate pfn range with the zone */
zone = zone_for_pfn_range(online_type, nid, pfn, nr_pages);
move_pfn_range_to_zone(zone, pfn, nr_pages, NULL);
--
2.24.1
\
 
 \ /
  Last update: 2020-01-13 12:34    [W:0.047 / U:1.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site