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Re: [PATCH 05/16] mm: Protect VMA modifications using VMA sequence count

From "Kirill A. Shutemov" <kirill@shutemov.name>
Newsgroups linux.kernel
Subject Re: [PATCH 05/16] mm: Protect VMA modifications using VMA sequence count
Date 2017-08-09 12:20 +0200
Message-ID <ucwfM-5MY-25@gated-at.bofh.it> (permalink)
References <ucdPQ-1fE-5@gated-at.bofh.it> <ucdPR-1fE-43@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Aug 08, 2017 at 04:35:38PM +0200, Laurent Dufour wrote:
> The VMA sequence count has been introduced to allow fast detection of
> VMA modification when running a page fault handler without holding
> the mmap_sem.
> 
> This patch provides protection agains the VMA modification done in :
> 	- madvise()
> 	- mremap()
> 	- mpol_rebind_policy()
> 	- vma_replace_policy()
> 	- change_prot_numa()
> 	- mlock(), munlock()
> 	- mprotect()
> 	- mmap_region()
> 	- collapse_huge_page()

I don't thinks it's anywhere near complete list of places where we touch
vm_flags. What is your plan for the rest?
-- 
 Kirill A. Shutemov

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Thread

[PATCH 00/16] Speculative page faults Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-08-08 16:40 +0200
  [PATCH 08/16] mm: Try spin lock in speculative path Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-08-08 16:40 +0200
  [PATCH 10/16] powerpc/mm: Add speculative page fault Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-08-08 16:40 +0200
  [PATCH 05/16] mm: Protect VMA modifications using VMA sequence count Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-08-08 16:40 +0200
    Re: [PATCH 05/16] mm: Protect VMA modifications using VMA sequence  count "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-08-09 12:20 +0200
      Re: [PATCH 05/16] mm: Protect VMA modifications using VMA sequence  count Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-08-09 12:50 +0200
        Re: [PATCH 05/16] mm: Protect VMA modifications using VMA sequence  count "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-08-10 03:00 +0200
          Re: [PATCH 05/16] mm: Protect VMA modifications using VMA sequence  count Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-08-10 10:30 +0200
            Re: [PATCH 05/16] mm: Protect VMA modifications using VMA sequence  count "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-08-10 15:50 +0200
              Re: [PATCH 05/16] mm: Protect VMA modifications using VMA sequence  count Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-08-10 20:20 +0200
  [PATCH 01/16] mm: Dont assume page-table invariance during faults Laurent Dufour <ldufour@linux.vnet.ibm.com> - 2017-08-08 16:50 +0200

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