[PATCH v3 00/40] mm: make VMA flag semantics explicit, eliminate VM_SPECIAL · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
[PATCH v3 01/40] mm/vma: fix mmap_prepare file handling, remove file_doesnt_need_get · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 01/40] mm/vma: fix mmap_prepare file handling, remove file_doesnt_need_get · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 01/40] mm/vma: fix mmap_prepare file handling, remove file_doesnt_need_get · Suren Baghdasaryan <surenb@google.com> · 2026-09-23
Re: [PATCH v3 01/40] mm/vma: fix mmap_prepare file handling, remove file_doesnt_need_get · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-23
Re: [PATCH v3 01/40] mm/vma: fix mmap_prepare file handling, remove file_doesnt_need_get · Suren Baghdasaryan <surenb@google.com> · 2026-09-23
Re: [PATCH v3 01/40] mm/vma: fix mmap_prepare file handling, remove file_doesnt_need_get · Zi Yan <ziy@nvidia.com> · 2026-09-24
Re: [PATCH v3 01/40] mm/vma: fix mmap_prepare file handling, remove file_doesnt_need_get · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-24
Re: [PATCH v3 01/40] mm/vma: fix mmap_prepare file handling, remove file_doesnt_need_get · "Liam R. Howlett" <liam@infradead.org> · 2026-09-24
Re: [PATCH v3 01/40] mm/vma: fix mmap_prepare file handling, remove file_doesnt_need_get · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-25
[PATCH v3 02/40] mm/vma: predicate setting mmap_prepare VMA fields on new vma alloc · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 02/40] mm/vma: predicate setting mmap_prepare VMA fields on new vma alloc · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 02/40] mm/vma: predicate setting mmap_prepare VMA fields on new vma alloc · Suren Baghdasaryan <surenb@google.com> · 2026-09-23
Re: [PATCH v3 02/40] mm/vma: predicate setting mmap_prepare VMA fields on new vma alloc · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-23
Re: [PATCH v3 02/40] mm/vma: predicate setting mmap_prepare VMA fields on new vma alloc · Suren Baghdasaryan <surenb@google.com> · 2026-09-23
Re: [PATCH v3 02/40] mm/vma: predicate setting mmap_prepare VMA fields on new vma alloc · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-23
Re: [PATCH v3 02/40] mm/vma: predicate setting mmap_prepare VMA fields on new vma alloc · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-23
Re: [PATCH v3 02/40] mm/vma: predicate setting mmap_prepare VMA fields on new vma alloc · "Zi Yan" <ziy@nvidia.com> · 2026-09-24
[PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge() · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge() · Suren Baghdasaryan <surenb@google.com> · 2026-09-23
Re: [PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge() · "Zi Yan" <ziy@nvidia.com> · 2026-09-24
Re: [PATCH v3 03/40] mm/vma: introduce and use vma_[flags_]can_merge() · Gregory Price <gourry@gourry.net> · 2026-09-24
[PATCH v3 04/40] mm: consistently validate VMA state after mmap[_prepare] hooks · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 04/40] mm: consistently validate VMA state after mmap[_prepare] hooks · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 04/40] mm: consistently validate VMA state after mmap[_prepare] hooks · Suren Baghdasaryan <surenb@google.com> · 2026-09-23
Re: [PATCH v3 04/40] mm: consistently validate VMA state after mmap[_prepare] hooks · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-23
Re: [PATCH v3 04/40] mm: consistently validate VMA state after mmap[_prepare] hooks · "Zi Yan" <ziy@nvidia.com> · 2026-09-24
Re: [PATCH v3 04/40] mm: consistently validate VMA state after mmap[_prepare] hooks · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-24
Re: [PATCH v3 04/40] mm: consistently validate VMA state after mmap[_prepare] hooks · Gregory Price <gourry@gourry.net> · 2026-09-24
Re: [PATCH v3 04/40] mm: consistently validate VMA state after mmap[_prepare] hooks · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-25
[PATCH v3 05/40] mm/vma: ensure mmap_prepare doesn't set actions on a mergeable vma · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 05/40] mm/vma: ensure mmap_prepare doesn't set actions on a mergeable vma · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 05/40] mm/vma: ensure mmap_prepare doesn't set actions on a mergeable vma · Gregory Price <gourry@gourry.net> · 2026-09-24
Re: [PATCH v3 05/40] mm/vma: ensure mmap_prepare doesn't set actions on a mergeable vma · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-25
Re: [PATCH v3 05/40] mm/vma: ensure mmap_prepare doesn't set actions on a mergeable vma · "Zi Yan" <ziy@nvidia.com> · 2026-09-24
Re: [PATCH v3 05/40] mm/vma: ensure mmap_prepare doesn't set actions on a mergeable vma · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-25
Re: [PATCH v3 05/40] mm/vma: ensure mmap_prepare doesn't set actions on a mergeable vma · Suren Baghdasaryan <surenb@google.com> · 2026-09-25
Re: [PATCH v3 05/40] mm/vma: ensure mmap_prepare doesn't set actions on a mergeable vma · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-25
[PATCH v3 06/40] mm: make map_kernel_pages_[prepare,complete] internal and unexported · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 06/40] mm: make map_kernel_pages_[prepare,complete] internal and unexported · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 06/40] mm: make map_kernel_pages_[prepare,complete] internal and unexported · "Zi Yan" <ziy@nvidia.com> · 2026-09-24
Re: [PATCH v3 06/40] mm: make map_kernel_pages_[prepare,complete] internal and unexported · Suren Baghdasaryan <surenb@google.com> · 2026-09-25
[PATCH v3 07/40] mm/vma: tidy up map kernel pages enum values · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 07/40] mm/vma: tidy up map kernel pages enum values · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 07/40] mm/vma: tidy up map kernel pages enum values · "Zi Yan" <ziy@nvidia.com> · 2026-09-24
Re: [PATCH v3 07/40] mm/vma: tidy up map kernel pages enum values · Suren Baghdasaryan <surenb@google.com> · 2026-09-25
[PATCH v3 08/40] mm: add mmap action for discontiguous kernel page mapping · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 08/40] mm: add mmap action for discontiguous kernel page mapping · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 08/40] mm: add mmap action for discontiguous kernel page mapping · "Zi Yan" <ziy@nvidia.com> · 2026-09-25
[PATCH v3 09/40] docs: filesystems: update mmap_prepare docs for discontig kernel pgs · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 09/40] docs: filesystems: update mmap_prepare docs for discontig kernel pgs · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 09/40] docs: filesystems: update mmap_prepare docs for discontig kernel pgs · "Zi Yan" <ziy@nvidia.com> · 2026-09-25
[PATCH v3 10/40] drivers/usb/mon: update to use mmap_prepare + map kernel pages · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 10/40] drivers/usb/mon: update to use mmap_prepare + map kernel pages · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 11/40] infiniband: update hfi1 to use remap_vmalloc_range() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 11/40] infiniband: update hfi1 to use remap_vmalloc_range() · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 12/40] selinux: reject writable opens of policy file, drop mmap shared/write check · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 12/40] selinux: reject writable opens of policy file, drop mmap shared/write check · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 13/40] ALSA: pcm: use vm_insert_page() to map PCM status page · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 13/40] ALSA: pcm: use vm_insert_page() to map PCM status page · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 14/40] bpf: arena: mark arena_map_mmap() mappings VM_MIXEDMAP · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 14/40] bpf: arena: mark arena_map_mmap() mappings VM_MIXEDMAP · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 15/40] mm/vma: add vma[_flags]_is_kernel_owned() predicates · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 15/40] mm/vma: add vma[_flags]_is_kernel_owned() predicates · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 15/40] mm/vma: add vma[_flags]_is_kernel_owned() predicates · "Zi Yan" <ziy@nvidia.com> · 2026-09-26
[PATCH v3 16/40] mm/vma: only allow mmap to clear VMA_MAYWRITE_BIT if kernel-owned · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 16/40] mm/vma: only allow mmap to clear VMA_MAYWRITE_BIT if kernel-owned · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 16/40] mm/vma: only allow mmap to clear VMA_MAYWRITE_BIT if kernel-owned · "Zi Yan" <ziy@nvidia.com> · 2026-09-26
Re: [PATCH v3 16/40] mm/vma: only allow mmap to clear VMA_MAYWRITE_BIT if kernel-owned · "Zi Yan" <ziy@nvidia.com> · 2026-09-26
Re: [PATCH v3 16/40] mm/vma: only allow mmap to clear VMA_MAYWRITE_BIT if kernel-owned · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-26
[PATCH v3 17/40] mm/vma: add and use vma_[flags]_is_fixed_mapping · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 17/40] mm/vma: add and use vma_[flags]_is_fixed_mapping · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 17/40] mm/vma: add and use vma_[flags]_is_fixed_mapping · "Zi Yan" <ziy@nvidia.com> · 2026-09-26
Re: [PATCH v3 17/40] mm/vma: add and use vma_[flags]_is_fixed_mapping · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-26
[PATCH v3 18/40] scsi: sg: convert mmap hook to mmap_prepare and rework · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 18/40] scsi: sg: convert mmap hook to mmap_prepare and rework · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 19/40] fbdev: defio: assert FBINFO_VIRTFB, drop VM_IO, add VM_MIXEDMAP · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 19/40] fbdev: defio: assert FBINFO_VIRTFB, drop VM_IO, add VM_MIXEDMAP · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 20/40] HSI: cmt_speech: convert mmap hook to mmap_prepare, refactor · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 20/40] HSI: cmt_speech: convert mmap hook to mmap_prepare, refactor · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 21/40] mm/gup: error out early on !VMA_MAYREAD_BIT VMAs · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 21/40] mm/gup: error out early on !VMA_MAYREAD_BIT VMAs · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 21/40] mm/gup: error out early on !VMA_MAYREAD_BIT VMAs · "Zi Yan" <ziy@nvidia.com> · 2026-09-26
[PATCH v3 22/40] uprobes: remove VM_IO, set VM_MIXEDMAP for mapped kernel pages · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 22/40] uprobes: remove VM_IO, set VM_MIXEDMAP for mapped kernel pages · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 23/40] mm/mlock: clear VMA_LOCKED_MASK over mmap callback · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 23/40] mm/mlock: clear VMA_LOCKED_MASK over mmap callback · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 24/40] mm/mlock: eliminate weird VMA_IO_BIT abuse and simplify · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 24/40] mm/mlock: eliminate weird VMA_IO_BIT abuse and simplify · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 24/40] mm/mlock: eliminate weird VMA_IO_BIT abuse and simplify · Zi Yan <ziy@nvidia.com> · 2026-09-23
Re: [PATCH v3 24/40] mm/mlock: eliminate weird VMA_IO_BIT abuse and simplify · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-24
Re: [PATCH v3 24/40] mm/mlock: eliminate weird VMA_IO_BIT abuse and simplify · Zi Yan <ziy@nvidia.com> · 2026-09-24
Re: [PATCH v3 24/40] mm/mlock: eliminate weird VMA_IO_BIT abuse and simplify · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-25
[PATCH v3 25/40] mm/vma: enforce that only kernel-owned mappings may set VMA_IO_BIT · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 25/40] mm/vma: enforce that only kernel-owned mappings may set VMA_IO_BIT · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 26/40] mm: remove VMA_IO_BIT check in vma[_flags]_is_kernel_owned() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 26/40] mm: remove VMA_IO_BIT check in vma[_flags]_is_kernel_owned() · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 27/40] mm: remove hugetlb_inline.h · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 27/40] mm: remove hugetlb_inline.h · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 28/40] mm: rename is_vm_hugetlb_page() to vma_is_hugetlb() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 28/40] mm: rename is_vm_hugetlb_page() to vma_is_hugetlb() · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 29/40] mm: drop some redundant checks around hugetlb VMAs · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 29/40] mm: drop some redundant checks around hugetlb VMAs · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 30/40] mm/madvise: update is_valid_guard_vma() to use vma_can_merge() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 30/40] mm/madvise: update is_valid_guard_vma() to use vma_can_merge() · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 31/40] mm/vma: introduce vma[_flags]_is_persistent() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 31/40] mm/vma: introduce vma[_flags]_is_persistent() · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 32/40] mm/uffd: use predicates for userfaultfd checks · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 32/40] mm/uffd: use predicates for userfaultfd checks · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 33/40] mm/madvise: use predicates for madvise(..., MADV_DOFORK) · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 33/40] mm/madvise: use predicates for madvise(..., MADV_DOFORK) · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 34/40] mm: eliminate VMA_SPECIAL_FLAGS usage when hugetlb explicitly tested · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 34/40] mm: eliminate VMA_SPECIAL_FLAGS usage when hugetlb explicitly tested · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 35/40] mm: eliminate VMA_SPECIAL_FLAGS check in lru_gen_look_around() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 35/40] mm: eliminate VMA_SPECIAL_FLAGS check in lru_gen_look_around() · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 36/40] mm: avoid use of VMA_SPECIAL_FLAGS in migrate_vma_setup() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 36/40] mm: avoid use of VMA_SPECIAL_FLAGS in migrate_vma_setup() · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 37/40] mm: eliminate VM_SPECIAL, VMA_SPECIAL_FLAGS · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 37/40] mm: eliminate VM_SPECIAL, VMA_SPECIAL_FLAGS · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 38/40] fuse: dax: do not set VM_MIXEDMAP · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 38/40] fuse: dax: do not set VM_MIXEDMAP · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 39/40] mm/huge_memory: remove vma_is_special_huge() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 39/40] mm/huge_memory: remove vma_is_special_huge() · sashiko-bot@kernel.org · 2026-09-17
[PATCH v3 40/40] mm/vma: introduce and use vma[_flags]_can_gup() · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-17
Re: [PATCH v3 40/40] mm/vma: introduce and use vma[_flags]_can_gup() · sashiko-bot@kernel.org · 2026-09-17
Re: [PATCH v3 00/40] mm: make VMA flag semantics explicit, eliminate VM_SPECIAL · Andrew Morton <akpm@linux-foundation.org> · 2026-09-17
Re: [PATCH v3 00/40] mm: make VMA flag semantics explicit, eliminate VM_SPECIAL · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-23
Re: [PATCH v3 00/40] mm: make VMA flag semantics explicit, eliminate VM_SPECIAL · "Arnd Bergmann" <arnd@arndb.de> · 2026-09-25
Re: [PATCH v3 00/40] mm: make VMA flag semantics explicit, eliminate VM_SPECIAL · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-26
Re: [PATCH v3 00/40] mm: make VMA flag semantics explicit, eliminate VM_SPECIAL · "Arnd Bergmann" <arnd@arndb.de> · 2026-09-26
Re: [PATCH v3 00/40] mm: make VMA flag semantics explicit, eliminate VM_SPECIAL · "Lorenzo Stoakes (ARM)" <ljs@kernel.org> · 2026-09-26
Re: [PATCH v3 00/40] mm: make VMA flag semantics explicit, eliminate VM_SPECIAL · "Arnd Bergmann" <arnd@arndb.de> · 2026-09-26

Re: [PATCH v3 07/40] mm/vma: tidy up map kernel pages enum values

From: sashiko-bot@kernel.org
Date: 2026-09-17 17:17:48
Also in: bpf, dri-devel, kvm, kvmarm, linux-perf-users, linux-rdma, linux-s390, linux-scsi, selinux

MMAP_MAP_KERNEL_PAGES is a mouthful, discard the MAP_ as that's implied by
MMAP.

Also while we're here delete useless comments for mmap actions whose names
clearly indicate what they are for.

Also update the userland VMA tests to reflect this change.

No functional change intended.

Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260917-b4-mmap-prepare-vma-flag-sanify-v3-0-4583d8a23bca@kernel.org?part=7

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help