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

[Laurent Dufour]

On 09/08/2017 12:12, Kirill A. Shutemov wrote:
> 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?

The goal is only to protect places where change to the VMA is impacting the
page fault handling. If you think I missed one, please advise.

Thanks,
Laurent.