The patch titled
memory hotplug: release memory regions in PAGES_PER_SECTION chunks
has been added to the -mm tree. Its filename is
memory-hotplug-release-memory-regions-in-pages_per_section-chunks.patch
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Subject: memory hotplug: release memory regions in PAGES_PER_SECTION chunks
From: Nathan Fontenot <nfont@xxxxxxxxxxxxxx>
During hotplug memory remove, memory regions should be released on a
PAGES_PER_SECTION size chunks. This mirrors the code in add_memory where
resources are requested on a PAGES_PER_SECTION size.
Attempting to release the entire memory region fails because there is not
a single resource for the total number of pages being removed. Instead
the resources for the pages are split in PAGES_PER_SECTION size chunks as
requested during memory add.
Signed-off-by: Nathan Fontenot <nfont@xxxxxxxxxxxxxx>
Signed-off-by: Badari Pulavarty <pbadari@xxxxxxxxxx>
Acked-by: Yasunori Goto <y-goto@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory_hotplug.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN mm/memory_hotplug.c~memory-hotplug-release-memory-regions-in-pages_per_section-chunks mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~memory-hotplug-release-memory-regions-in-pages_per_section-chunks
+++ a/mm/memory_hotplug.c
@@ -324,11 +324,11 @@ int __remove_pages(struct zone *zone, un
BUG_ON(phys_start_pfn & ~PAGE_SECTION_MASK);
BUG_ON(nr_pages % PAGES_PER_SECTION);
- release_mem_region(phys_start_pfn << PAGE_SHIFT, nr_pages * PAGE_SIZE);
-
sections_to_remove = nr_pages / PAGES_PER_SECTION;
for (i = 0; i < sections_to_remove; i++) {
unsigned long pfn = phys_start_pfn + i*PAGES_PER_SECTION;
+ release_mem_region(pfn << PAGE_SHIFT,
+ PAGES_PER_SECTION << PAGE_SHIFT);
ret = __remove_section(zone, __pfn_to_section(pfn));
if (ret)
break;
_
Patches currently in -mm which might be from nfont@xxxxxxxxxxxxxx are
origin.patch
memory-hotplug-release-memory-regions-in-pages_per_section-chunks.patch
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