diff options
| author | Reza Arbab | 2016-07-26 15:22:20 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2016-07-26 16:19:19 -0700 |
| commit | e51e6c8f80731d723ada126c029301cee2827fac (patch) | |
| tree | 7c9bc6454417e31774a39207620823119f078568 /mm | |
| parent | 90cae1fe1c3540f791d5b8e025985fa5e699b2bb (diff) | |
memory-hotplug: add move_pfn_range()
Add move_pfn_range(), a wrapper to call move_pfn_range_left() or
move_pfn_range_right().
No functional change. This will be utilized by a later patch.
Link: http://lkml.kernel.org/r/1462816419-4479-2-git-send-email-arbab@linux.vnet.ibm.com
Signed-off-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Daniel Kiper <daniel.kiper@oracle.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Andrew Banman <abanman@sgi.com>
Cc: Chen Yucong <slaoub@gmail.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Zhang Zhen <zhenzhang.zhang@huawei.com>
Cc: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory_hotplug.c | 38 |
1 files changed, 28 insertions, 10 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index e3cbdcaff2a5..a86a66cbef77 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -449,6 +449,25 @@ out_fail: return -1; } +static struct zone * __meminit move_pfn_range(int zone_shift, + unsigned long start_pfn, unsigned long end_pfn) +{ + struct zone *zone = page_zone(pfn_to_page(start_pfn)); + int ret = 0; + + if (zone_shift < 0) + ret = move_pfn_range_left(zone + zone_shift, zone, + start_pfn, end_pfn); + else if (zone_shift) + ret = move_pfn_range_right(zone, zone + zone_shift, + start_pfn, end_pfn); + + if (ret) + return NULL; + + return zone + zone_shift; +} + static void __meminit grow_pgdat_span(struct pglist_data *pgdat, unsigned long start_pfn, unsigned long end_pfn) { @@ -1039,6 +1058,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ int nid; int ret; struct memory_notify arg; + int zone_shift = 0; /* * This doesn't need a lock to do pfn_to_page(). @@ -1053,18 +1073,16 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ return -EINVAL; if (online_type == MMOP_ONLINE_KERNEL && - zone_idx(zone) == ZONE_MOVABLE) { - if (move_pfn_range_left(zone - 1, zone, pfn, pfn + nr_pages)) - return -EINVAL; - } + zone_idx(zone) == ZONE_MOVABLE) + zone_shift = -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)) - return -EINVAL; - } + zone_idx(zone) == ZONE_MOVABLE - 1) + zone_shift = 1; - /* Previous code may changed the zone of the pfn range */ - zone = page_zone(pfn_to_page(pfn)); + zone = move_pfn_range(zone_shift, pfn, pfn + nr_pages); + if (!zone) + return -EINVAL; arg.start_pfn = pfn; arg.nr_pages = nr_pages; |