The patch titled
Subject: mm/memory_hotplug: remove move_pfn_range()
has been added to the -mm tree. Its filename is
mm-memory_hotplug-remove-move_pfn_range.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memory_hotplug-remove-move_pfn_range.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memory_hotplug-remove-move_pfn_range.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: mm/memory_hotplug: remove move_pfn_range()
Let's remove this indirection. We need the zone in the caller either way,
so let's just detect it there. Add some documentation for
move_pfn_range_to_zone() instead.
Link: http://lkml.kernel.org/r/20190724142324.3686-1-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory_hotplug.c | 23 +++++++----------------
1 file changed, 7 insertions(+), 16 deletions(-)
--- a/mm/memory_hotplug.c~mm-memory_hotplug-remove-move_pfn_range
+++ a/mm/memory_hotplug.c
@@ -715,7 +715,11 @@ static void __meminit resize_pgdat_range
pgdat->node_spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - pgdat->node_start_pfn;
}
-
+/*
+ * Associate the pfn range with the given zone, initializing the memmaps
+ * and resizing the pgdat/zone data to span the added pages. After this
+ * call, all affected pages are PG_reserved.
+ */
void __ref move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages, struct vmem_altmap *altmap)
{
@@ -804,20 +808,6 @@ struct zone * zone_for_pfn_range(int onl
return default_zone_for_pfn(nid, start_pfn, nr_pages);
}
-/*
- * Associates the given pfn range with the given node and the zone appropriate
- * for the given online type.
- */
-static struct zone * __meminit move_pfn_range(int online_type, int nid,
- unsigned long start_pfn, unsigned long nr_pages)
-{
- struct zone *zone;
-
- zone = zone_for_pfn_range(online_type, nid, start_pfn, nr_pages);
- move_pfn_range_to_zone(zone, start_pfn, nr_pages, NULL);
- return zone;
-}
-
int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_type)
{
unsigned long flags;
@@ -840,7 +830,8 @@ int __ref online_pages(unsigned long pfn
put_device(&mem->dev);
/* associate pfn range with the zone */
- zone = move_pfn_range(online_type, nid, pfn, nr_pages);
+ zone = zone_for_pfn_range(online_type, nid, pfn, nr_pages);
+ move_pfn_range_to_zone(zone, pfn, nr_pages, NULL);
arg.start_pfn = pfn;
arg.nr_pages = nr_pages;
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
acpi-scan-acquire-device_hotplug_lock-in-acpi_scan_init.patch
mm-memory_hotplug-remove-move_pfn_range.patch
drivers-base-nodec-simplify-unregister_memory_block_under_nodes.patch
