mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
2f52578f9c
These are the folio equivalent of page_mapping() and page_file_mapping(). Add an out-of-line page_mapping() wrapper around folio_mapping() in order to prevent the page_folio() call from bloating every caller of page_mapping(). Adjust page_file_mapping() and page_mapping_file() to use folios internally. Rename __page_file_mapping() to swapcache_mapping() and change it to take a folio. This ends up saving 122 bytes of text overall. folio_mapping() is 45 bytes shorter than page_mapping() was, but the new page_mapping() wrapper is 30 bytes. The major reduction is a few bytes less in dozens of nfs functions (which call page_file_mapping()). Most of these appear to be a slight change in gcc's register allocation decisions, which allow: 48 8b 56 08 mov 0x8(%rsi),%rdx 48 8d 42 ff lea -0x1(%rdx),%rax 83 e2 01 and $0x1,%edx 48 0f 44 c6 cmove %rsi,%rax to become: 48 8b 46 08 mov 0x8(%rsi),%rax 48 8d 78 ff lea -0x1(%rax),%rdi a8 01 test $0x1,%al 48 0f 44 fe cmove %rsi,%rdi for a reduction of a single byte. Once the NFS client is converted to use folios, this entire sequence will disappear. Also add folio_mapping() documentation. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Jeff Layton <jlayton@kernel.org> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: William Kucharski <william.kucharski@oracle.com> Reviewed-by: David Howells <dhowells@redhat.com>
105 lines
1.9 KiB
ReStructuredText
105 lines
1.9 KiB
ReStructuredText
======================
|
|
Memory Management APIs
|
|
======================
|
|
|
|
User Space Memory Access
|
|
========================
|
|
|
|
.. kernel-doc:: arch/x86/include/asm/uaccess.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: arch/x86/lib/usercopy_32.c
|
|
:export:
|
|
|
|
.. kernel-doc:: mm/gup.c
|
|
:functions: get_user_pages_fast
|
|
|
|
.. _mm-api-gfp-flags:
|
|
|
|
Memory Allocation Controls
|
|
==========================
|
|
|
|
.. kernel-doc:: include/linux/gfp.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: include/linux/gfp.h
|
|
:doc: Page mobility and placement hints
|
|
|
|
.. kernel-doc:: include/linux/gfp.h
|
|
:doc: Watermark modifiers
|
|
|
|
.. kernel-doc:: include/linux/gfp.h
|
|
:doc: Reclaim modifiers
|
|
|
|
.. kernel-doc:: include/linux/gfp.h
|
|
:doc: Useful GFP flag combinations
|
|
|
|
The Slab Cache
|
|
==============
|
|
|
|
.. kernel-doc:: include/linux/slab.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: mm/slab.c
|
|
:export:
|
|
|
|
.. kernel-doc:: mm/slab_common.c
|
|
:export:
|
|
|
|
.. kernel-doc:: mm/util.c
|
|
:functions: kfree_const kvmalloc_node kvfree
|
|
|
|
Virtually Contiguous Mappings
|
|
=============================
|
|
|
|
.. kernel-doc:: mm/vmalloc.c
|
|
:export:
|
|
|
|
File Mapping and Page Cache
|
|
===========================
|
|
|
|
.. kernel-doc:: mm/readahead.c
|
|
:export:
|
|
|
|
.. kernel-doc:: mm/filemap.c
|
|
:export:
|
|
|
|
.. kernel-doc:: mm/page-writeback.c
|
|
:export:
|
|
|
|
.. kernel-doc:: mm/truncate.c
|
|
:export:
|
|
|
|
.. kernel-doc:: include/linux/pagemap.h
|
|
:internal:
|
|
|
|
Memory pools
|
|
============
|
|
|
|
.. kernel-doc:: mm/mempool.c
|
|
:export:
|
|
|
|
DMA pools
|
|
=========
|
|
|
|
.. kernel-doc:: mm/dmapool.c
|
|
:export:
|
|
|
|
More Memory Management Functions
|
|
================================
|
|
|
|
.. kernel-doc:: mm/memory.c
|
|
:export:
|
|
|
|
.. kernel-doc:: mm/page_alloc.c
|
|
.. kernel-doc:: mm/mempolicy.c
|
|
.. kernel-doc:: include/linux/mm_types.h
|
|
:internal:
|
|
.. kernel-doc:: include/linux/mm_inline.h
|
|
.. kernel-doc:: include/linux/page-flags.h
|
|
.. kernel-doc:: include/linux/mm.h
|
|
:internal:
|
|
.. kernel-doc:: include/linux/page_ref.h
|
|
.. kernel-doc:: include/linux/mmzone.h
|
|
.. kernel-doc:: mm/util.c
|
|
:functions: folio_mapping
|