The patch titled
Subject: mm: Check if section present during memory block (un)registering
has been added to the -mm tree. Its filename is
mm-check-if-section-present-during-memory-block-unregistering-v2.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-check-if-section-present-during-memory-block-unregistering-v2.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-check-if-section-present-during-memory-block-unregistering-v2.patch
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------------------------------------------------------
From: Yinghai Lu <yinghai@xxxxxxxxxx>
Subject: mm: Check if section present during memory block (un)registering
-v2: add fixes and comment.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/base/node.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff -puN drivers/base/node.c~mm-check-if-section-present-during-memory-block-unregistering-v2 drivers/base/node.c
--- a/drivers/base/node.c~mm-check-if-section-present-during-memory-block-unregistering-v2
+++ a/drivers/base/node.c
@@ -392,12 +392,17 @@ int register_mem_sect_under_node(struct
for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
int page_nid, scn_nr;
+ /*
+ * memory block could have several absent sections from start.
+ * skip pfn range from absent section
+ */
scn_nr = pfn_to_section_nr(pfn);
if (!present_section_nr(scn_nr)) {
pfn = round_down(pfn + PAGES_PER_SECTION,
PAGES_PER_SECTION) - 1;
continue;
}
+
page_nid = get_nid_for_pfn(pfn);
if (page_nid < 0)
continue;
@@ -438,6 +443,10 @@ int unregister_mem_sect_under_nodes(stru
for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
int nid, scn_nr;
+ /*
+ * memory block could have several absent sections from start.
+ * skip pfn range from absent section
+ */
scn_nr = pfn_to_section_nr(pfn);
if (!present_section_nr(scn_nr)) {
pfn = round_down(pfn + PAGES_PER_SECTION,
_
Patches currently in -mm which might be from yinghai@xxxxxxxxxx are
mm-check-if-section-present-during-memory-block-unregistering.patch
mm-check-if-section-present-during-memory-block-unregistering-v2.patch
lib-decompressors-use-real-out-buf-size-for-gunzip-with-kernel.patch
lib-decompressors-use-real-out-buf-size-for-gunzip-with-kernel-v2.patch
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