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-mm@kvack.org, linux-nvdimm@lists.01.org,
linux-kernel@vger.kernel.org, mhocko@suse.com, david@redhat.com
Subject: [PATCH v6 02/12] mm/sparsemem: Introduce common definitions for the size and mask of a section
Date: Wed, 17 Apr 2019 11:39:05 -0700 [thread overview]
Message-ID: <155552634586.2015392.2662168839054356692.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <155552633539.2015392.2477781120122237934.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 ecd16718285e..def451a56c3e 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:[~2019-04-17 18:52 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-17 18:38 [PATCH v6 00/12] mm: Sub-section memory hotplug support Dan Williams
2019-04-17 18:39 ` [PATCH v6 01/12] mm/sparsemem: Introduce struct mem_section_usage Dan Williams
2019-05-01 23:25 ` Pavel Tatashin
2019-05-02 6:07 ` Dan Williams
2019-05-02 14:16 ` Pavel Tatashin
2019-05-04 0:22 ` Dan Williams
2019-05-04 15:55 ` Pavel Tatashin
2019-04-17 18:39 ` Dan Williams [this message]
2019-05-02 14:53 ` [PATCH v6 02/12] mm/sparsemem: Introduce common definitions for the size and mask of a section Pavel Tatashin
2019-05-03 0:41 ` Dan Williams
2019-05-03 10:35 ` Robin Murphy
2019-05-03 12:57 ` Pavel Tatashin
2019-05-03 13:00 ` Oscar Salvador
2019-04-17 18:39 ` [PATCH v6 03/12] mm/sparsemem: Add helpers track active portions of a section at boot Dan Williams
2019-04-25 14:33 ` Oscar Salvador
2019-04-25 14:43 ` Oscar Salvador
2019-04-26 12:57 ` Oscar Salvador
2019-05-02 16:12 ` Pavel Tatashin
2019-05-04 19:26 ` Dan Williams
2019-04-17 18:39 ` [PATCH v6 04/12] mm/hotplug: Prepare shrink_{zone, pgdat}_span for sub-section removal Dan Williams
2019-04-19 23:09 ` Ralph Campbell
2019-04-19 23:13 ` Dan Williams
2019-04-26 13:59 ` Oscar Salvador
2019-04-26 14:00 ` Oscar Salvador
2019-05-02 19:18 ` Pavel Tatashin
2019-04-17 18:39 ` [PATCH v6 05/12] mm/sparsemem: Convert kmalloc_section_memmap() to populate_section_memmap() Dan Williams
2019-05-02 19:28 ` Pavel Tatashin
2019-04-17 18:39 ` [PATCH v6 06/12] mm/hotplug: Add mem-hotplug restrictions for remove_memory() Dan Williams
2019-04-23 21:21 ` David Hildenbrand
2019-04-24 18:07 ` Dan Williams
2019-04-17 18:39 ` [PATCH v6 07/12] mm: Kill is_dev_zone() helper Dan Williams
2019-04-17 20:17 ` David Hildenbrand
2019-04-26 14:04 ` Oscar Salvador
2019-05-02 20:37 ` Pavel Tatashin
2019-04-17 18:39 ` [PATCH v6 08/12] mm/sparsemem: Prepare for sub-section ranges Dan Williams
2019-05-02 21:25 ` Pavel Tatashin
2019-04-17 18:39 ` [PATCH v6 09/12] mm/sparsemem: Support sub-section hotplug Dan Williams
2019-04-17 18:39 ` [PATCH v6 10/12] mm/devm_memremap_pages: Enable sub-section remap Dan Williams
2019-04-17 18:39 ` [PATCH v6 11/12] libnvdimm/pfn: Fix fsdax-mode namespace info-block zero-fields Dan Williams
2019-04-17 22:02 ` Andrew Morton
2019-04-17 22:09 ` Dan Williams
2019-04-17 18:39 ` [PATCH v6 12/12] libnvdimm/pfn: Stop padding pmem namespaces to section alignment Dan Williams
2019-04-17 22:03 ` [PATCH v6 00/12] mm: Sub-section memory hotplug support Andrew Morton
2019-04-17 22:59 ` Dan Williams
2019-04-18 2:09 ` Dan Williams
2019-04-18 12:45 ` Jeff Moyer
2019-04-19 3:25 ` Dan Williams
2019-04-23 13:16 ` Oscar Salvador
2019-04-24 20:43 ` Pavel Tatashin
2019-05-02 22:46 ` Pavel Tatashin
2019-05-02 23:20 ` Dan Williams
2019-05-02 23:21 ` Dan Williams
2019-05-03 10:48 ` Oscar Salvador
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