From: akpm@linux-foundation.org
To: mm-commits@vger.kernel.org, vbabka@suse.cz,
pasha.tatashin@soleen.com, mhocko@suse.com, mhocko@kernel.org,
david@redhat.com, anshuman.khandual@arm.com, osalvador@suse.de
Subject: + mmmemory_hotplug-relax-fully-spanned-sections-check.patch added to -mm tree
Date: Fri, 16 Apr 2021 12:56:06 -0700 [thread overview]
Message-ID: <20210416195606.5JMZx%akpm@linux-foundation.org> (raw)
The patch titled
Subject: mm,memory_hotplug: relax fully spanned sections check
has been added to the -mm tree. Its filename is
mmmemory_hotplug-relax-fully-spanned-sections-check.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mmmemory_hotplug-relax-fully-spanned-sections-check.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mmmemory_hotplug-relax-fully-spanned-sections-check.patch
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The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Oscar Salvador <osalvador@suse.de>
Subject: mm,memory_hotplug: relax fully spanned sections check
When using self-hosted vmemmap pages, the number of pages passed to
{online,offline}_pages might not fully span sections, but they always
fully span pageblocks. Relax the check account for that case.
Link: https://lkml.kernel.org/r/20210416112411.9826-3-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/memory_hotplug.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
--- a/mm/memory_hotplug.c~mmmemory_hotplug-relax-fully-spanned-sections-check
+++ a/mm/memory_hotplug.c
@@ -838,9 +838,14 @@ int __ref online_pages(unsigned long pfn
int ret;
struct memory_notify arg;
- /* We can only online full sections (e.g., SECTION_IS_ONLINE) */
+ /* We can only offline full sections (e.g., SECTION_IS_ONLINE).
+ * However, when using e.g: memmap_on_memory, some pages are initialized
+ * prior to calling in here. The remaining amount of pages must be
+ * pageblock aligned.
+ */
if (WARN_ON_ONCE(!nr_pages ||
- !IS_ALIGNED(pfn | nr_pages, PAGES_PER_SECTION)))
+ !IS_ALIGNED(pfn, pageblock_nr_pages) ||
+ !IS_ALIGNED(pfn + nr_pages, PAGES_PER_SECTION)))
return -EINVAL;
mem_hotplug_begin();
@@ -1573,9 +1578,14 @@ int __ref offline_pages(unsigned long st
int ret, node;
char *reason;
- /* We can only offline full sections (e.g., SECTION_IS_ONLINE) */
+ /* We can only offline full sections (e.g., SECTION_IS_ONLINE).
+ * However, when using e.g: memmap_on_memory, some pages are initialized
+ * prior to calling in here. The remaining amount of pages must be
+ * pageblock aligned.
+ */
if (WARN_ON_ONCE(!nr_pages ||
- !IS_ALIGNED(start_pfn | nr_pages, PAGES_PER_SECTION)))
+ !IS_ALIGNED(start_pfn, pageblock_nr_pages) ||
+ !IS_ALIGNED(start_pfn + nr_pages, PAGES_PER_SECTION)))
return -EINVAL;
mem_hotplug_begin();
_
Patches currently in -mm which might be from osalvador@suse.de are
x86-vmemmap-drop-handling-of-4k-unaligned-vmemmap-range.patch
x86-vmemmap-drop-handling-of-1gb-vmemmap-ranges.patch
x86-vmemmap-handle-unpopulated-sub-pmd-ranges.patch
x86-vmemmap-handle-unpopulated-sub-pmd-ranges-fix.patch
x86-vmemmap-optimize-for-consecutive-sections-in-partial-populated-pmds.patch
drivers-base-memory-introduce-memory_block_onlineoffline.patch
mmmemory_hotplug-relax-fully-spanned-sections-check.patch
mmmemory_hotplug-allocate-memmap-from-the-added-memory-range.patch
acpimemhotplug-enable-mhp_memmap_on_memory-when-supported.patch
mmmemory_hotplug-add-kernel-boot-option-to-enable-memmap_on_memory.patch
x86-kconfig-introduce-arch_mhp_memmap_on_memory_enable.patch
arm64-kconfig-introduce-arch_mhp_memmap_on_memory_enable.patch
next reply other threads:[~2021-04-16 19:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 19:56 akpm [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-04-22 4:24 + mmmemory_hotplug-relax-fully-spanned-sections-check.patch added to -mm tree akpm
2021-04-16 18:48 akpm
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