The patch titled Subject: mm: use find_get_incore_page in memcontrol has been added to the -mm tree. Its filename is mm-use-find_get_incore_page-in-memcontrol.patch This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/mm-use-find_get_incore_page-in-memcontrol.patch and later at https://ozlabs.org/~akpm/mmotm/broken-out/mm-use-find_get_incore_page-in-memcontrol.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> Subject: mm: use find_get_incore_page in memcontrol The current code does not protect against swapoff of the underlying swap device, so this is a bug fix as well as a worthwhile reduction in code complexity. Link: https://lkml.kernel.org/r/20200910183318.20139-3-willy@xxxxxxxxxxxxx Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Cc: Huang Ying <ying.huang@xxxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> Cc: Johannes Weiner <hannes@xxxxxxxxxxx> Cc: Matthew Auld <matthew.auld@xxxxxxxxx> Cc: William Kucharski <william.kucharski@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memcontrol.c | 24 ++---------------------- 1 file changed, 2 insertions(+), 22 deletions(-) --- a/mm/memcontrol.c~mm-use-find_get_incore_page-in-memcontrol +++ a/mm/memcontrol.c @@ -5539,35 +5539,15 @@ static struct page *mc_handle_swap_pte(s static struct page *mc_handle_file_pte(struct vm_area_struct *vma, unsigned long addr, pte_t ptent, swp_entry_t *entry) { - struct page *page = NULL; - struct address_space *mapping; - pgoff_t pgoff; - if (!vma->vm_file) /* anonymous vma */ return NULL; if (!(mc.flags & MOVE_FILE)) return NULL; - mapping = vma->vm_file->f_mapping; - pgoff = linear_page_index(vma, addr); - /* page is moved even if it's not RSS of this task(page-faulted). */ -#ifdef CONFIG_SWAP /* shmem/tmpfs may report page out on swap: account for that too. */ - if (shmem_mapping(mapping)) { - page = find_get_entry(mapping, pgoff); - if (xa_is_value(page)) { - swp_entry_t swp = radix_to_swp_entry(page); - *entry = swp; - page = find_get_page(swap_address_space(swp), - swp_offset(swp)); - } - } else - page = find_get_page(mapping, pgoff); -#else - page = find_get_page(mapping, pgoff); -#endif - return page; + return find_get_incore_page(vma->vm_file->f_mapping, + linear_page_index(vma, addr)); } /** _ Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are mm-debug-do-not-dereference-i_ino-blindly.patch mm-factor-find_get_incore_page-out-of-mincore_page.patch mm-use-find_get_incore_page-in-memcontrol.patch mm-optimise-madvise-willneed.patch proc-optimise-smaps-for-shmem-entries.patch i915-use-find_lock_page-instead-of-find_lock_entry.patch mm-convert-find_get_entry-to-return-the-head-page.patch mm-shmem-return-head-page-from-find_lock_entry.patch mm-add-find_lock_head.patch mm-account-pmd-tables-like-pte-tables.patch mm-move-pagedoublemap-bit.patch mm-simplify-pagedoublemap-with-pf_second-policy.patch xarray-add-xa_get_order.patch xarray-add-xas_split.patch xarray-add-xas_split-fix-2.patch mm-filemap-fix-storing-to-a-thp-shadow-entry.patch mm-filemap-fix-page-cache-removal-for-arbitrary-sized-thps.patch mm-memory-remove-page-fault-assumption-of-compound-page-size.patch mm-page_owner-change-split_page_owner-to-take-a-count.patch mm-huge_memory-fix-page_trans_huge_mapcount-assumption-of-thp-size.patch mm-huge_memory-fix-can_split_huge_page-assumption-of-thp-size.patch mm-rmap-fix-assumptions-of-thp-size.patch mm-truncate-fix-truncation-for-pages-of-arbitrary-size.patch mm-page-writeback-support-tail-pages-in-wait_for_stable_page.patch mm-vmscan-allow-arbitrary-sized-pages-to-be-paged-out.patch mm-readahead-add-define_readahead.patch mm-readahead-make-page_cache_ra_unbounded-take-a-readahead_control.patch mm-readahead-make-do_page_cache_ra-take-a-readahead_control.patch mm-readahead-add-page_cache_sync_ra-and-page_cache_async_ra.patch harden-autofs-ioctl-table.patch