From: Dan Williams <dan.j.williams@intel.com>
To: akpm@linux-foundation.org
Cc: "Michal Hocko" <mhocko@suse.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Logan Gunthorpe" <logang@deltatee.com>,
linux-nvdimm@lists.01.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, osalvador@suse.de, mhocko@suse.com
Subject: [PATCH v7 02/12] mm/sparsemem: Introduce common definitions for the size and mask of a section
Date: Wed, 01 May 2019 22:55:32 -0700 [thread overview]
Message-ID: <155677653274.2336373.11220321059915670288.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <155677652226.2336373.8700273400832001094.stgit@dwillia2-desk3.amr.corp.intel.com>
Up-level the local section size and mask from kernel/memremap.c to
global definitions. These will be used by the new sub-section hotplug
support.
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
include/linux/mmzone.h | 2 ++
kernel/memremap.c | 10 ++++------
mm/hmm.c | 2 --
3 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index f0bbd85dc19a..6726fc175b51 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1134,6 +1134,8 @@ static inline unsigned long early_pfn_to_nid(unsigned long pfn)
* PFN_SECTION_SHIFT pfn to/from section number
*/
#define PA_SECTION_SHIFT (SECTION_SIZE_BITS)
+#define PA_SECTION_SIZE (1UL << PA_SECTION_SHIFT)
+#define PA_SECTION_MASK (~(PA_SECTION_SIZE-1))
#define PFN_SECTION_SHIFT (SECTION_SIZE_BITS - PAGE_SHIFT)
#define NR_MEM_SECTIONS (1UL << SECTIONS_SHIFT)
diff --git a/kernel/memremap.c b/kernel/memremap.c
index 4e59d29245f4..f355586ea54a 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -14,8 +14,6 @@
#include <linux/hmm.h>
static DEFINE_XARRAY(pgmap_array);
-#define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1)
-#define SECTION_SIZE (1UL << PA_SECTION_SHIFT)
#if IS_ENABLED(CONFIG_DEVICE_PRIVATE)
vm_fault_t device_private_entry_fault(struct vm_area_struct *vma,
@@ -98,8 +96,8 @@ static void devm_memremap_pages_release(void *data)
put_page(pfn_to_page(pfn));
/* pages are dead and unused, undo the arch mapping */
- align_start = res->start & ~(SECTION_SIZE - 1);
- align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE)
+ align_start = res->start & ~(PA_SECTION_SIZE - 1);
+ align_size = ALIGN(res->start + resource_size(res), PA_SECTION_SIZE)
- align_start;
nid = page_to_nid(pfn_to_page(align_start >> PAGE_SHIFT));
@@ -160,8 +158,8 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
if (!pgmap->ref || !pgmap->kill)
return ERR_PTR(-EINVAL);
- align_start = res->start & ~(SECTION_SIZE - 1);
- align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE)
+ align_start = res->start & ~(PA_SECTION_SIZE - 1);
+ align_size = ALIGN(res->start + resource_size(res), PA_SECTION_SIZE)
- align_start;
align_end = align_start + align_size - 1;
diff --git a/mm/hmm.c b/mm/hmm.c
index 0db8491090b8..a7e7f8e33c5f 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -34,8 +34,6 @@
#include <linux/mmu_notifier.h>
#include <linux/memory_hotplug.h>
-#define PA_SECTION_SIZE (1UL << PA_SECTION_SHIFT)
-
#if IS_ENABLED(CONFIG_HMM_MIRROR)
static const struct mmu_notifier_ops hmm_mmu_notifier_ops;
next prev parent reply other threads:[~2019-05-02 6:09 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-02 5:55 [PATCH v7 00/12] mm: Sub-section memory hotplug support Dan Williams
2019-05-02 5:55 ` [PATCH v7 01/12] mm/sparsemem: Introduce struct mem_section_usage Dan Williams
2019-05-03 7:35 ` Oscar Salvador
2019-05-02 5:55 ` Dan Williams [this message]
2019-05-03 8:06 ` [PATCH v7 02/12] mm/sparsemem: Introduce common definitions for the size and mask of a section Oscar Salvador
2019-05-02 5:55 ` [PATCH v7 03/12] mm/sparsemem: Add helpers track active portions of a section at boot Dan Williams
2019-05-02 7:48 ` Oscar Salvador
2019-05-02 14:03 ` Dan Williams
2019-05-03 7:31 ` Oscar Salvador
2019-05-03 19:52 ` Pavel Tatashin
2019-05-02 5:55 ` [PATCH v7 04/12] mm/hotplug: Prepare shrink_{zone, pgdat}_span for sub-section removal Dan Williams
2019-05-02 5:55 ` [PATCH v7 05/12] mm/sparsemem: Convert kmalloc_section_memmap() to populate_section_memmap() Dan Williams
2019-05-03 8:46 ` Oscar Salvador
2019-05-02 5:55 ` [PATCH v7 06/12] mm/hotplug: Kill is_dev_zone() usage in __remove_pages() Dan Williams
2019-05-02 11:27 ` David Hildenbrand
2019-05-03 7:37 ` Oscar Salvador
2019-05-02 5:55 ` [PATCH v7 07/12] mm: Kill is_dev_zone() helper Dan Williams
2019-05-02 5:56 ` [PATCH v7 08/12] mm/sparsemem: Prepare for sub-section ranges Dan Williams
2019-05-03 11:00 ` Oscar Salvador
2019-05-02 5:56 ` [PATCH v7 09/12] mm/sparsemem: Support sub-section hotplug Dan Williams
2019-05-03 12:56 ` Oscar Salvador
2019-06-04 4:17 ` Dan Williams
2019-05-02 5:56 ` [PATCH v7 10/12] mm/devm_memremap_pages: Enable sub-section remap Dan Williams
2019-05-02 5:56 ` [PATCH v7 11/12] libnvdimm/pfn: Fix fsdax-mode namespace info-block zero-fields Dan Williams
2019-05-02 5:56 ` [PATCH v7 12/12] libnvdimm/pfn: Stop padding pmem namespaces to section alignment Dan Williams
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