wireguard-linux/Documentation/vm, branch jd/orphan-parallel

mm/doc: fix a literal block markup

2020-10-16T05:28:20Z

Literal blocks with :: markup should be indented, as otherwise Sphinx complains: Documentation/vm/hmm.rst:363: WARNING: Literal block expected; none found. Fixes: f7ebd9ed7767 ("mm/doc: add usage description for migrate_vma_*()") Signed-off-by: Mauro Carvalho Chehab

docs: get rid of :c:type explicit declarations for structs

2020-10-15T05:49:40Z

The :c:type:`foo` only works properly with structs before Sphinx 3.x. On Sphinx 3.x, structs should now be declared using the .. c:struct, and referenced via :c:struct tag. As we now have the automarkup.py macro, that automatically convert: struct foo into cross-references, let's get rid of that, solving several warnings when building docs with Sphinx 3.x. Reviewed-by: André Almeida # blk-mq.rst Reviewed-by: Takashi Iwai # sound Reviewed-by: Mike Rapoport Reviewed-by: Greg Kroah-Hartman Signed-off-by: Mauro Carvalho Chehab

docs/vm: fix 'mm_count' vs 'mm_users' counter confusion

2020-10-14T01:38:32Z

In the context of the anonymous address space lifespan description the 'mm_users' reference counter is confused with 'mm_count'. I.e a "zombie" mm gets released when "mm_count" becomes zero, not "mm_users". Signed-off-by: Alexander Gordeev Signed-off-by: Andrew Morton Cc: Jonathan Corbet Link: https://lkml.kernel.org/r/1597040695-32633-1-git-send-email-agordeev@linux.ibm.com Signed-off-by: Linus Torvalds

mm/doc: add usage description for migrate_vma_*()

2020-09-16T18:19:51Z

The migrate_vma_setup(), migrate_vma_pages(), and migrate_vma_finalize() API usage by device drivers is not well documented. Add a description for how device drivers are expected to use it. Signed-off-by: Ralph Campbell Reviewed-by: Alistair Popple Link: https://lore.kernel.org/r/20200909212956.20104-1-rcampbell@nvidia.com Signed-off-by: Jonathan Corbet

docs: add some new files to their respective index.rst files

2020-09-10T16:48:20Z

There were some new file additions for Kernel 5.7 and 5.8 that weren't added at the corresponding index file. Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/9fd4d04f0d122ff38b5342a0098d99cc2f546652.1599660067.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet

mm/doc: editorial pass on page migration

2020-09-09T17:39:46Z

Add Sphinx reference links to HMM and CPUSETS, and numerous small editorial changes to make the page_migration.rst document more readable. Signed-off-by: Ralph Campbell Reviewed-by: Randy Dunlap Link: https://lore.kernel.org/r/20200902225247.15213-1-rcampbell@nvidia.com Signed-off-by: Jonathan Corbet

mm/vmstat: add events for THP migration without split

2020-08-12T17:57:57Z

Add following new vmstat events which will help in validating THP migration without split. Statistics reported through these new VM events will help in performance debugging. 1. THP_MIGRATION_SUCCESS 2. THP_MIGRATION_FAILURE 3. THP_MIGRATION_SPLIT In addition, these new events also update normal page migration statistics appropriately via PGMIGRATE_SUCCESS and PGMIGRATE_FAILURE. While here, this updates current trace event 'mm_migrate_pages' to accommodate now available THP statistics. [akpm@linux-foundation.org: s/hpage_nr_pages/thp_nr_pages/] [ziy@nvidia.com: v2] Link: http://lkml.kernel.org/r/C5E3C65C-8253-4638-9D3C-71A61858BB8B@nvidia.com [anshuman.khandual@arm.com: s/thp_nr_pages/hpage_nr_pages/] Link: http://lkml.kernel.org/r/1594287583-16568-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Signed-off-by: Zi Yan Signed-off-by: Andrew Morton Reviewed-by: Daniel Jordan Cc: Hugh Dickins Cc: Matthew Wilcox Cc: Zi Yan Cc: John Hubbard Cc: Naoya Horiguchi Link: http://lkml.kernel.org/r/1594080415-27924-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds

mm/sparse: cleanup the code surrounding memory_present()

2020-08-07T18:33:27Z

After removal of CONFIG_HAVE_MEMBLOCK_NODE_MAP we have two equivalent functions that call memory_present() for each region in memblock.memory: sparse_memory_present_with_active_regions() and membocks_present(). Moreover, all architectures have a call to either of these functions preceding the call to sparse_init() and in the most cases they are called one after the other. Mark the regions from memblock.memory as present during sparce_init() by making sparse_init() call memblocks_present(), make memblocks_present() and memory_present() functions static and remove redundant sparse_memory_present_with_active_regions() function. Also remove no longer required HAVE_MEMORY_PRESENT configuration option. Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Link: http://lkml.kernel.org/r/20200712083130.22919-1-rppt@kernel.org Signed-off-by: Linus Torvalds

mm/sparsemem: enable vmem_altmap support in vmemmap_alloc_block_buf()

2020-08-07T18:33:27Z

There are many instances where vmemap allocation is often switched between regular memory and device memory just based on whether altmap is available or not. vmemmap_alloc_block_buf() is used in various platforms to allocate vmemmap mappings. Lets also enable it to handle altmap based device memory allocation along with existing regular memory allocations. This will help in avoiding the altmap based allocation switch in many places. To summarize there are two different methods to call vmemmap_alloc_block_buf(). vmemmap_alloc_block_buf(size, node, NULL) /* Allocate from system RAM */ vmemmap_alloc_block_buf(size, node, altmap) /* Allocate from altmap */ This converts altmap_alloc_block_buf() into a static function, drops it's entry from the header and updates Documentation/vm/memory-model.rst. Suggested-by: Robin Murphy Signed-off-by: Anshuman Khandual Signed-off-by: Andrew Morton Tested-by: Jia He Reviewed-by: Catalin Marinas Cc: Jonathan Corbet Cc: Will Deacon Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Dave Hansen Cc: Andy Lutomirski Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Cc: Dan Williams Cc: David Hildenbrand Cc: Fenghua Yu Cc: Hsin-Yi Wang Cc: "Kirill A. Shutemov" Cc: Mark Rutland Cc: "Matthew Wilcox (Oracle)" Cc: Michal Hocko Cc: Mike Rapoport Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Pavel Tatashin Cc: Steve Capper Cc: Tony Luck Cc: Yu Zhao Link: http://lkml.kernel.org/r/1594004178-8861-3-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds

Documentation/mm: add descriptions for arch page table helpers

2020-08-07T18:33:23Z

This adds a specific description file for all arch page table helpers which is in sync with the semantics being tested via CONFIG_DEBUG_VM_PGTABLE. All future changes either to these descriptions here or the debug test should always remain in sync. [anshuman.khandual@arm.com: fold in Mike's patch for the rst document, fix typos in the rst document] Link: http://lkml.kernel.org/r/1594610587-4172-5-git-send-email-anshuman.khandual@arm.com Suggested-by: Mike Rapoport Signed-off-by: Anshuman Khandual Signed-off-by: Andrew Morton Acked-by: Mike Rapoport Cc: Jonathan Corbet Cc: Mike Rapoport Cc: Vineet Gupta Cc: Catalin Marinas Cc: Will Deacon Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Christian Borntraeger Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Cc: Kirill A. Shutemov Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Zi Yan Link: http://lkml.kernel.org/r/1593996516-7186-5-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds