The patch titled
Subject: docs/vm: update ZONE_DEVICE memory model documentation
has been added to the -mm tree. Its filename is
mm-document-zone_device-memory-model-implications-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-document-zone_device-memory-model-implications-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-document-zone_device-memory-model-implications-fix.patch
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From: Dan Williams <dan.j.williams@xxxxxxxxx>
Subject: docs/vm: update ZONE_DEVICE memory model documentation
Mike notes that Sphinx needs a newline before the start of a bulleted
list, and v10 of the subsection patch set changed the subsection size
from an arch-variable 'PMD_SIZE' to a constant 2MB.
Link: http://lkml.kernel.org/r/156109575458.1409767.1885676287099277666.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reported-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/vm/memory-model.rst | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/Documentation/vm/memory-model.rst~mm-document-zone_device-memory-model-implications-fix
+++ a/Documentation/vm/memory-model.rst
@@ -205,10 +205,11 @@ subject to its memory ranges being expos
hotplug api on memory block boundaries. The implementation relies on
this lack of user-api constraint to allow sub-section sized memory
ranges to be specified to :c:func:`arch_add_memory`, the top-half of
-memory hotplug. Sub-section support allows for `PMD_SIZE` as the minimum
-alignment granularity for :c:func:`devm_memremap_pages`.
+memory hotplug. Sub-section support allows for 2MB as the cross-arch
+common alignment granularity for :c:func:`devm_memremap_pages`.
The users of `ZONE_DEVICE` are:
+
* pmem: Map platform persistent memory to be used as a direct-I/O target
via DAX mappings.
_
Patches currently in -mm which might be from dan.j.williams@xxxxxxxxx are
mm-sparsemem-introduce-struct-mem_section_usage.patch
mm-sparsemem-introduce-a-section_is_early-flag.patch
mm-sparsemem-add-helpers-track-active-portions-of-a-section-at-boot.patch
mm-hotplug-prepare-shrink_zone-pgdat_span-for-sub-section-removal.patch
mm-sparsemem-convert-kmalloc_section_memmap-to-populate_section_memmap.patch
mm-hotplug-kill-is_dev_zone-usage-in-__remove_pages.patch
mm-kill-is_dev_zone-helper.patch
mm-sparsemem-prepare-for-sub-section-ranges.patch
mm-sparsemem-support-sub-section-hotplug.patch
mm-document-zone_device-memory-model-implications.patch
mm-document-zone_device-memory-model-implications-fix.patch
mm-devm_memremap_pages-enable-sub-section-remap.patch
libnvdimm-pfn-fix-fsdax-mode-namespace-info-block-zero-fields.patch
libnvdimm-pfn-stop-padding-pmem-namespaces-to-section-alignment.patch
mm-sparsemem-cleanup-section-number-data-types.patch
