The patch titled Subject: mm: document FAULT_FLAG_VMA_LOCK flag has been added to the -mm mm-unstable branch. Its filename is mm-add-fault_flag_vma_lock-flag-fix.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-add-fault_flag_vma_lock-flag-fix.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 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 via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Suren Baghdasaryan <surenb@xxxxxxxxxx> Subject: mm: document FAULT_FLAG_VMA_LOCK flag Date: Tue, 28 Feb 2023 18:27:20 -0800 FAULT_FLAG_VMA_LOCK flag was introduced without proper description. Fix this by documenting it. Link: https://lkml.kernel.org/r/20230301022720.1380780-2-surenb@xxxxxxxxxx Fixes: 863be34fc093 ("mm: add FAULT_FLAG_VMA_LOCK flag") Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx> Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/all/20230301113648.7c279865@xxxxxxxxxxxxxxxx/ Cc: Dan Carpenter <error27@xxxxxxxxx> Cc: David Hildenbrand <david@xxxxxxxxxx> Cc: David Howells <dhowells@xxxxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: Jason Gunthorpe <jgg@xxxxxxxx> Cc: Laurent Dufour <laurent.dufour@xxxxxxxxxx> Cc: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> Cc: Yu Zhao <yuzhao@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- --- a/include/linux/mm_types.h~mm-add-fault_flag_vma_lock-flag-fix +++ a/include/linux/mm_types.h @@ -1060,6 +1060,7 @@ typedef struct { * mapped after the fault. * @FAULT_FLAG_ORIG_PTE_VALID: whether the fault has vmf->orig_pte cached. * We should only access orig_pte if this flag set. + * @FAULT_FLAG_VMA_LOCK: The fault is handled under VMA lock. * * About @FAULT_FLAG_ALLOW_RETRY and @FAULT_FLAG_TRIED: we can specify * whether we would allow page faults to retry by specifying these two _ Patches currently in -mm which might be from surenb@xxxxxxxxxx are mm-introduce-config_per_vma_lock.patch mm-move-mmap_lock-assert-function-definitions.patch mm-add-per-vma-lock-and-helper-functions-to-control-it.patch mm-mark-vma-as-being-written-when-changing-vm_flags.patch mm-mmap-move-vma_prepare-before-vma_adjust_trans_huge.patch mm-khugepaged-write-lock-vma-while-collapsing-a-huge-page.patch mm-mmap-write-lock-vmas-in-vma_prepare-before-modifying-them.patch mm-mmap-write-lock-vmas-in-vma_prepare-before-modifying-them-fix.patch mm-mremap-write-lock-vma-while-remapping-it-to-a-new-address-range.patch mm-write-lock-vmas-before-removing-them-from-vma-tree.patch mm-write-lock-vmas-before-removing-them-from-vma-tree-fix.patch mm-conditionally-write-lock-vma-in-free_pgtables.patch kernel-fork-assert-no-vma-readers-during-its-destruction.patch mm-mmap-prevent-pagefault-handler-from-racing-with-mmu_notifier-registration.patch mm-introduce-vma-detached-flag.patch mm-introduce-lock_vma_under_rcu-to-be-used-from-arch-specific-code.patch mm-fall-back-to-mmap_lock-if-vma-anon_vma-is-not-yet-set.patch mm-add-fault_flag_vma_lock-flag.patch mm-add-fault_flag_vma_lock-flag-fix.patch mm-prevent-do_swap_page-from-handling-page-faults-under-vma-lock.patch mm-prevent-userfaults-to-be-handled-under-per-vma-lock.patch mm-introduce-per-vma-lock-statistics.patch x86-mm-try-vma-lock-based-page-fault-handling-first.patch arm64-mm-try-vma-lock-based-page-fault-handling-first.patch mm-mmap-free-vm_area_struct-without-call_rcu-in-exit_mmap.patch mm-separate-vma-lock-from-vm_area_struct.patch