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From: Mike Kravetz <mike.kravetz@oracle.com>
To: Peter Xu <peterx@redhat.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Mike Rapoport <rppt@linux.vnet.ibm.com>,
	Nadav Amit <nadav.amit@gmail.com>,
	Jerome Glisse <jglisse@redhat.com>,
	Hugh Dickins <hughd@google.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Kirill A . Shutemov" <kirill@shutemov.name>,
	Axel Rasmussen <axelrasmussen@google.com>,
	Matthew Wilcox <willy@infradead.org>
Subject: Re: [PATCH 21/23] hugetlb/userfaultfd: Only drop uffd-wp special pte if required
Date: Mon, 26 Apr 2021 16:09:25 -0700	[thread overview]
Message-ID: <5c198016-91ac-119f-a5a5-40c79c98182c@oracle.com> (raw)
In-Reply-To: <20210426220544.GI85002@xz-x1>

On 4/26/21 3:05 PM, Peter Xu wrote:
> On Mon, Apr 26, 2021 at 02:36:26PM -0700, Mike Kravetz wrote:
>> On 4/26/21 2:16 PM, Peter Xu wrote:
>>> On Fri, Apr 23, 2021 at 01:33:08PM -0700, Mike Kravetz wrote:
>>>> On 3/22/21 5:50 PM, Peter Xu wrote:
>>>>> diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
>>>>> index 92710600596e..4047fa042782 100644
>>>>> --- a/include/linux/hugetlb.h
>>>>> +++ b/include/linux/hugetlb.h
>>>>> @@ -121,14 +121,15 @@ long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
>>>>>  			 unsigned long *, unsigned long *, long, unsigned int,
>>>>>  			 int *);
>>>>>  void unmap_hugepage_range(struct vm_area_struct *,
>>>>> -			  unsigned long, unsigned long, struct page *);
>>>>> +			  unsigned long, unsigned long, struct page *,
>>>>> +			  unsigned long);
>>>>>  void __unmap_hugepage_range_final(struct mmu_gather *tlb,
>>>>>  			  struct vm_area_struct *vma,
>>>>>  			  unsigned long start, unsigned long end,
>>>>> -			  struct page *ref_page);
>>>>> +			  struct page *ref_page, unsigned long zap_flags);
>>>>>  void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
>>>>>  				unsigned long start, unsigned long end,
>>>>> -				struct page *ref_page);
>>>>> +				struct page *ref_page, unsigned long zap_flags);
>>>>
>>>> Nothing introduced with your patch, but it seems __unmap_hugepage_range_final
>>>> does not need to be in the header and can be static in hugetlb.c.
>>>
>>> It seems to be used in unmap_single_vma() of mm/memory.c?
>>
>> Sorry, that should have been __unmap_hugepage_range.  No need for you to
>> address in this series.
> 
> Ah yes; I'd rather add a patch if you won't object, since my series will touch
> that definition.
> 

No objection if you want to fix, thanks.

-- 
Mike Kravetz

  reply	other threads:[~2021-04-26 23:09 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-23  0:48 [PATCH 00/23] userfaultfd-wp: Support shmem and hugetlbfs Peter Xu
2021-03-23  0:48 ` [PATCH 01/23] shmem/userfaultfd: Take care of UFFDIO_COPY_MODE_WP Peter Xu
2021-03-23  0:48 ` [PATCH 02/23] mm: Clear vmf->pte after pte_unmap_same() returns Peter Xu
2021-03-23  2:34   ` Miaohe Lin
2021-03-23 15:40     ` Peter Xu
2021-03-23  0:48 ` [PATCH 03/23] mm/userfaultfd: Introduce special pte for unmapped file-backed mem Peter Xu
2021-03-23  0:48 ` [PATCH 04/23] mm/swap: Introduce the idea of special swap ptes Peter Xu
2021-03-23  0:48 ` [PATCH 05/23] shmem/userfaultfd: Handle uffd-wp special pte in page fault handler Peter Xu
2021-03-23  0:48 ` [PATCH 06/23] mm: Drop first_index/last_index in zap_details Peter Xu
2021-03-23  0:48 ` [PATCH 07/23] mm: Introduce zap_details.zap_flags Peter Xu
2021-03-23  2:11   ` Matthew Wilcox
2021-03-23 15:43     ` Peter Xu
2021-03-23  0:48 ` [PATCH 08/23] mm: Introduce ZAP_FLAG_SKIP_SWAP Peter Xu
2021-03-23  0:48 ` [PATCH 09/23] mm: Pass zap_flags into unmap_mapping_pages() Peter Xu
2021-03-23  0:48 ` [PATCH 10/23] shmem/userfaultfd: Persist uffd-wp bit across zapping for file-backed Peter Xu
2021-03-23  0:49 ` [PATCH 11/23] shmem/userfaultfd: Allow wr-protect none pte for file-backed mem Peter Xu
2021-03-23  0:49 ` [PATCH 12/23] shmem/userfaultfd: Allows file-back mem to be uffd wr-protected on thps Peter Xu
2021-03-23  0:49 ` [PATCH 13/23] shmem/userfaultfd: Handle the left-overed special swap ptes Peter Xu
2021-03-23  0:49 ` [PATCH 14/23] shmem/userfaultfd: Pass over uffd-wp special swap pte when fork() Peter Xu
2021-03-23  0:49 ` [PATCH 15/23] hugetlb/userfaultfd: Hook page faults for uffd write protection Peter Xu
2021-04-21 22:02   ` Mike Kravetz
2021-03-23  0:49 ` [PATCH 16/23] hugetlb/userfaultfd: Take care of UFFDIO_COPY_MODE_WP Peter Xu
2021-04-21 23:06   ` Mike Kravetz
2021-04-22  1:14     ` Peter Xu
2021-03-23  0:49 ` [PATCH 17/23] hugetlb/userfaultfd: Handle UFFDIO_WRITEPROTECT Peter Xu
2021-04-22 18:22   ` Mike Kravetz
2021-03-23  0:49 ` [PATCH 18/23] mm/hugetlb: Introduce huge version of special swap pte helpers Peter Xu
2021-04-22 19:00   ` Mike Kravetz
2021-03-23  0:50 ` [PATCH 19/23] hugetlb/userfaultfd: Handle uffd-wp special pte in hugetlb pf handler Peter Xu
2021-04-22 22:45   ` Mike Kravetz
2021-04-26  2:08     ` Peter Xu
2021-03-23  0:50 ` [PATCH 20/23] hugetlb/userfaultfd: Allow wr-protect none ptes Peter Xu
2021-04-23  0:08   ` Mike Kravetz
2021-03-23  0:50 ` [PATCH 21/23] hugetlb/userfaultfd: Only drop uffd-wp special pte if required Peter Xu
2021-04-23 20:33   ` Mike Kravetz
2021-04-26 21:16     ` Peter Xu
2021-04-26 21:36       ` Mike Kravetz
2021-04-26 22:05         ` Peter Xu
2021-04-26 23:09           ` Mike Kravetz [this message]
2021-03-23  0:50 ` [PATCH 22/23] mm/userfaultfd: Enable write protection for shmem & hugetlbfs Peter Xu
2021-03-23  0:50 ` [PATCH 23/23] userfaultfd/selftests: Enable uffd-wp for shmem/hugetlbfs Peter Xu
2021-03-23  0:54 ` [PATCH 00/23] userfaultfd-wp: Support shmem and hugetlbfs Peter Xu
2021-04-21 16:03 ` Peter Xu
2021-04-21 21:39   ` Mike Kravetz
2021-04-22  1:16     ` Peter Xu

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