hugetlb: Disable huge pmd unshare for uffd-wp
Status from this message: [merged] hugetlb-userfaultfd-unshare-all-pmds-for-hugetlbfs-when-register-wp.patch removed from -mm tree
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b4 am [email protected]Versions newest first · linked by author and title
- v4 Latest4 patches 5 repliesApplied 4/4
- v34 patches 5 repliesSuperseded
- v24 patches 9 repliesSuperseded
Earlier versions · 1
| Version | Posted | Patches | Replies | Status |
|---|---|---|---|---|
| v1 | 4 patches | 0 replies | Superseded |
Changes in v4 from the cover letter
- fix build for sparc by removing extra line in patch 1 [Mike]
- pick Mike's r-b for patch 4
Patches in v4 All 4 applied
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/4 | hugetlb: Pass vma into huge_pte_alloc() and huge_pmd_share()arch/ arch/ arch/ +8 more | +24 | 1 reply | Applied |
| 2/4 | hugetlb/userfaultfd: Forbid huge pmd sharing when uffd enabledarch/ include/ include/ +1 more | +26 | 3 replies | Applied |
| 3/4 | mm/hugetlb: Move flush_hugetlb_tlb_range() into hugetlb.hinclude/ mm/ | +8 | 0 replies | Applied |
| 4/4 | hugetlb/userfaultfd: Unshare all pmds for hugetlbfs when register wpfs/ include/ mm/ | +58 | 0 replies | Applied |
Reviews trailers per patch
3 of 4 patches have a Reviewed-by or Acked-by.
| Patch | Mike Kravetz | Axel Rasmussen |
|---|---|---|
| 1/4 | ||
| 2/4 | R-b | R-b |
| 3/4 | R-b | R-b |
| 4/4 | R-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH v4 0/4] hugetlb: Disable huge pmd unshare for uffd-wp
v4:
- fix build for sparc by removing extra line in patch 1 [Mike]
- pick Mike's r-b for patch 4
v3:
- patch 4:
- fix build failure for !CMA and/or !HUGETLBFS [Axel]
- Fix mmu notifier range to use start/end [Mike]
- add more r-bs
v2:
- patch 4: move hugetlb_unshare_all_pmds() into mm/hugetlb.c, so it can be used even outside userfaultfd.c
This series tries to disable huge pmd unshare of hugetlbfs backed memory for uffd-wp. Although uffd-wp of hugetlbfs is still during rfc stage, the idea of this series may be needed for multiple tasks (Axel's uffd minor fault series, and Mike's soft dirty series), so I picked it out from the larger series.
References works:
Uffd shmem+hugetlbfs rfc:
https://lore.kernel.org/lkml/[email protected]/
Uffd minor mode for hugetlbfs:
https://lore.kernel.org/lkml/[email protected]/
Soft dirty for hugetlbfs:
https://lore.kernel.org/lkml/[email protected]/
Please review, thanks.
Peter Xu (4):
hugetlb: Pass vma into huge_pte_alloc() and huge_pmd_share() hugetlb/userfaultfd: Forbid huge pmd sharing when uffd enabled mm/hugetlb: Move flush_hugetlb_tlb_range() into hugetlb.h hugetlb/userfaultfd: Unshare all pmds for hugetlbfs when register wp
arch/arm64/mm/hugetlbpage.c | 7 ++- arch/ia64/mm/hugetlbpage.c | 3 +- arch/mips/mm/hugetlbpage.c | 4 +- arch/parisc/mm/hugetlbpage.c | 2 +- arch/powerpc/mm/hugetlbpage.c | 3 +- arch/s390/mm/hugetlbpage.c | 2 +- arch/sh/mm/hugetlbpage.c | 2 +- arch/sparc/mm/hugetlbpage.c | 2 +- fs/userfaultfd.c | 4 ++ include/linux/hugetlb.h | 18 ++++++- include/linux/userfaultfd_k.h | 9 ++++ mm/hugetlb.c | 94 +++++++++++++++++++++++++++-------- mm/userfaultfd.c | 2 +- 13 files changed, 116 insertions(+), 36 deletions(-)
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