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![Linus Torvalds](/assets/img/avatar_default.png)
switching from a user process to a kernel thread. - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj Raghav. - zsmalloc performance improvements from Sergey Senozhatsky. - Yue Zhao has found and fixed some data race issues around the alteration of memcg userspace tunables. - VFS rationalizations from Christoph Hellwig: - removal of most of the callers of write_one_page(). - make __filemap_get_folio()'s return value more useful - Luis Chamberlain has changed tmpfs so it no longer requires swap backing. Use `mount -o noswap'. - Qi Zheng has made the slab shrinkers operate locklessly, providing some scalability benefits. - Keith Busch has improved dmapool's performance, making part of its operations O(1) rather than O(n). - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd, permitting userspace to wr-protect anon memory unpopulated ptes. - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive rather than exclusive, and has fixed a bunch of errors which were caused by its unintuitive meaning. - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature, which causes minor faults to install a write-protected pte. - Vlastimil Babka has done some maintenance work on vma_merge(): cleanups to the kernel code and improvements to our userspace test harness. - Cleanups to do_fault_around() by Lorenzo Stoakes. - Mike Rapoport has moved a lot of initialization code out of various mm/ files and into mm/mm_init.c. - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for DRM, but DRM doesn't use it any more. - Lorenzo has also coverted read_kcore() and vread() to use iterators and has thereby removed the use of bounce buffers in some cases. - Lorenzo has also contributed further cleanups of vma_merge(). - Chaitanya Prakash provides some fixes to the mmap selftesting code. - Matthew Wilcox changes xfs and afs so they no longer take sleeping locks in ->map_page(), a step towards RCUification of pagefaults. - Suren Baghdasaryan has improved mmap_lock scalability by switching to per-VMA locking. - Frederic Weisbecker has reworked the percpu cache draining so that it no longer causes latency glitches on cpu isolated workloads. - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig logic. - Liu Shixin has changed zswap's initialization so we no longer waste a chunk of memory if zswap is not being used. - Yosry Ahmed has improved the performance of memcg statistics flushing. - David Stevens has fixed several issues involving khugepaged, userfaultfd and shmem. - Christoph Hellwig has provided some cleanup work to zram's IO-related code paths. - David Hildenbrand has fixed up some issues in the selftest code's testing of our pte state changing. - Pankaj Raghav has made page_endio() unneeded and has removed it. - Peter Xu contributed some rationalizations of the userfaultfd selftests. - Yosry Ahmed has fixed an issue around memcg's page recalim accounting. - Chaitanya Prakash has fixed some arm-related issues in the selftests/mm code. - Longlong Xia has improved the way in which KSM handles hwpoisoned pages. - Peter Xu fixes a few issues with uffd-wp at fork() time. - Stefan Roesch has changed KSM so that it may now be used on a per-process and per-cgroup basis. -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZEr3zQAKCRDdBJ7gKXxA jlLoAP0fpQBipwFxED0Us4SKQfupV6z4caXNJGPeay7Aj11/kQD/aMRC2uPfgr96 eMG3kwn2pqkB9ST2QpkaRbxA//eMbQY= =J+Dj -----END PGP SIGNATURE----- Merge tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of switching from a user process to a kernel thread. - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj Raghav. - zsmalloc performance improvements from Sergey Senozhatsky. - Yue Zhao has found and fixed some data race issues around the alteration of memcg userspace tunables. - VFS rationalizations from Christoph Hellwig: - removal of most of the callers of write_one_page() - make __filemap_get_folio()'s return value more useful - Luis Chamberlain has changed tmpfs so it no longer requires swap backing. Use `mount -o noswap'. - Qi Zheng has made the slab shrinkers operate locklessly, providing some scalability benefits. - Keith Busch has improved dmapool's performance, making part of its operations O(1) rather than O(n). - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd, permitting userspace to wr-protect anon memory unpopulated ptes. - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive rather than exclusive, and has fixed a bunch of errors which were caused by its unintuitive meaning. - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature, which causes minor faults to install a write-protected pte. - Vlastimil Babka has done some maintenance work on vma_merge(): cleanups to the kernel code and improvements to our userspace test harness. - Cleanups to do_fault_around() by Lorenzo Stoakes. - Mike Rapoport has moved a lot of initialization code out of various mm/ files and into mm/mm_init.c. - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for DRM, but DRM doesn't use it any more. - Lorenzo has also coverted read_kcore() and vread() to use iterators and has thereby removed the use of bounce buffers in some cases. - Lorenzo has also contributed further cleanups of vma_merge(). - Chaitanya Prakash provides some fixes to the mmap selftesting code. - Matthew Wilcox changes xfs and afs so they no longer take sleeping locks in ->map_page(), a step towards RCUification of pagefaults. - Suren Baghdasaryan has improved mmap_lock scalability by switching to per-VMA locking. - Frederic Weisbecker has reworked the percpu cache draining so that it no longer causes latency glitches on cpu isolated workloads. - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig logic. - Liu Shixin has changed zswap's initialization so we no longer waste a chunk of memory if zswap is not being used. - Yosry Ahmed has improved the performance of memcg statistics flushing. - David Stevens has fixed several issues involving khugepaged, userfaultfd and shmem. - Christoph Hellwig has provided some cleanup work to zram's IO-related code paths. - David Hildenbrand has fixed up some issues in the selftest code's testing of our pte state changing. - Pankaj Raghav has made page_endio() unneeded and has removed it. - Peter Xu contributed some rationalizations of the userfaultfd selftests. - Yosry Ahmed has fixed an issue around memcg's page recalim accounting. - Chaitanya Prakash has fixed some arm-related issues in the selftests/mm code. - Longlong Xia has improved the way in which KSM handles hwpoisoned pages. - Peter Xu fixes a few issues with uffd-wp at fork() time. - Stefan Roesch has changed KSM so that it may now be used on a per-process and per-cgroup basis. * tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits) mm,unmap: avoid flushing TLB in batch if PTE is inaccessible shmem: restrict noswap option to initial user namespace mm/khugepaged: fix conflicting mods to collapse_file() sparse: remove unnecessary 0 values from rc mm: move 'mmap_min_addr' logic from callers into vm_unmapped_area() hugetlb: pte_alloc_huge() to replace huge pte_alloc_map() maple_tree: fix allocation in mas_sparse_area() mm: do not increment pgfault stats when page fault handler retries zsmalloc: allow only one active pool compaction context selftests/mm: add new selftests for KSM mm: add new KSM process and sysfs knobs mm: add new api to enable ksm per process mm: shrinkers: fix debugfs file permissions mm: don't check VMA write permissions if the PTE/PMD indicates write permissions migrate_pages_batch: fix statistics for longterm pin retry userfaultfd: use helper function range_in_vma() lib/show_mem.c: use for_each_populated_zone() simplify code mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list() fs/buffer: convert create_page_buffers to folio_create_buffers fs/buffer: add folio_create_empty_buffers helper ...
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/*
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* Compatibility functions which bloat the callers too much to make inline.
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* All of the callers of these functions should be converted to use folios
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* eventually.
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*/
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#include <linux/migrate.h>
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#include <linux/pagemap.h>
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#include <linux/rmap.h>
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#include <linux/swap.h>
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#include "internal.h"
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struct address_space *page_mapping(struct page *page)
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{
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return folio_mapping(page_folio(page));
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}
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EXPORT_SYMBOL(page_mapping);
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void unlock_page(struct page *page)
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{
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return folio_unlock(page_folio(page));
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}
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EXPORT_SYMBOL(unlock_page);
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void end_page_writeback(struct page *page)
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{
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return folio_end_writeback(page_folio(page));
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}
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EXPORT_SYMBOL(end_page_writeback);
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void wait_on_page_writeback(struct page *page)
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{
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return folio_wait_writeback(page_folio(page));
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}
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EXPORT_SYMBOL_GPL(wait_on_page_writeback);
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void wait_for_stable_page(struct page *page)
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{
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return folio_wait_stable(page_folio(page));
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}
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EXPORT_SYMBOL_GPL(wait_for_stable_page);
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void mark_page_accessed(struct page *page)
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{
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folio_mark_accessed(page_folio(page));
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}
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EXPORT_SYMBOL(mark_page_accessed);
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bool set_page_writeback(struct page *page)
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{
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return folio_start_writeback(page_folio(page));
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}
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EXPORT_SYMBOL(set_page_writeback);
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bool set_page_dirty(struct page *page)
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{
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return folio_mark_dirty(page_folio(page));
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}
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EXPORT_SYMBOL(set_page_dirty);
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int __set_page_dirty_nobuffers(struct page *page)
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{
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return filemap_dirty_folio(page_mapping(page), page_folio(page));
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}
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EXPORT_SYMBOL(__set_page_dirty_nobuffers);
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bool clear_page_dirty_for_io(struct page *page)
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{
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return folio_clear_dirty_for_io(page_folio(page));
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}
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EXPORT_SYMBOL(clear_page_dirty_for_io);
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bool redirty_page_for_writepage(struct writeback_control *wbc,
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struct page *page)
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{
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return folio_redirty_for_writepage(wbc, page_folio(page));
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}
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EXPORT_SYMBOL(redirty_page_for_writepage);
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void lru_cache_add_inactive_or_unevictable(struct page *page,
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struct vm_area_struct *vma)
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{
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folio_add_lru_vma(page_folio(page), vma);
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}
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int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
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pgoff_t index, gfp_t gfp)
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{
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return filemap_add_folio(mapping, page_folio(page), index, gfp);
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}
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EXPORT_SYMBOL(add_to_page_cache_lru);
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noinline
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struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index,
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int fgp_flags, gfp_t gfp)
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{
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struct folio *folio;
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folio = __filemap_get_folio(mapping, index, fgp_flags, gfp);
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if (IS_ERR(folio))
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return NULL;
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return folio_file_page(folio, index);
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}
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EXPORT_SYMBOL(pagecache_get_page);
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struct page *grab_cache_page_write_begin(struct address_space *mapping,
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pgoff_t index)
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{
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return pagecache_get_page(mapping, index, FGP_WRITEBEGIN,
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mapping_gfp_mask(mapping));
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}
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EXPORT_SYMBOL(grab_cache_page_write_begin);
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bool isolate_lru_page(struct page *page)
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{
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if (WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"))
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return false;
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return folio_isolate_lru((struct folio *)page);
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}
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void putback_lru_page(struct page *page)
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{
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folio_putback_lru(page_folio(page));
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}
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#ifdef CONFIG_MMU
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void page_add_new_anon_rmap(struct page *page, struct vm_area_struct *vma,
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unsigned long address)
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{
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VM_BUG_ON_PAGE(PageTail(page), page);
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return folio_add_new_anon_rmap((struct folio *)page, vma, address);
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}
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#endif
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