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From: Mike Kravetz <mike.kravetz@oracle.com>
To: "Axel Rasmussen" <axelrasmussen@google.com>,
	"Alexander Viro" <viro@zeniv.linux.org.uk>,
	"Alexey Dobriyan" <adobriyan@gmail.com>,
	"Andrea Arcangeli" <aarcange@redhat.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Anshuman Khandual" <anshuman.khandual@arm.com>,
	"Catalin Marinas" <catalin.marinas@arm.com>,
	"Chinwen Chang" <chinwen.chang@mediatek.com>,
	"Huang Ying" <ying.huang@intel.com>,
	"Ingo Molnar" <mingo@redhat.com>, "Jann Horn" <jannh@google.com>,
	"Jerome Glisse" <jglisse@redhat.com>,
	"Lokesh Gidra" <lokeshgidra@google.com>,
	"Matthew Wilcox (Oracle)" <willy@infradead.org>,
	"Michael Ellerman" <mpe@ellerman.id.au>,
	"Michal Koutný" <mkoutny@suse.com>,
	"Michel Lespinasse" <walken@google.com>,
	"Mike Rapoport" <rppt@linux.vnet.ibm.com>,
	"Nicholas Piggin" <npiggin@gmail.com>,
	"Peter Xu" <peterx@redhat.com>, "Shaohua Li" <shli@fb.com>,
	"Shawn Anastasio" <shawn@anastas.io>,
	"Steven Rostedt" <rostedt@goodmis.org>,
	"Steven Price" <steven.price@arm.com>,
	"Vlastimil Babka" <vbabka@suse.cz>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org, Adam Ruprecht <ruprecht@google.com>,
	Cannon Matthews <cannonmatthews@google.com>,
	"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
	David Rientjes <rientjes@google.com>,
	Mina Almasry <almasrymina@google.com>,
	Oliver Upton <oupton@google.com>
Subject: Re: [PATCH v5 01/10] hugetlb: Pass vma into huge_pte_alloc() and huge_pmd_share()
Date: Thu, 11 Feb 2021 15:59:09 -0800	[thread overview]
Message-ID: <99dee8e1-dacc-d4d7-2270-dd473b022b74@oracle.com> (raw)
In-Reply-To: <20210210212200.1097784-2-axelrasmussen@google.com>

On 2/10/21 1:21 PM, Axel Rasmussen wrote:
> From: Peter Xu <peterx@redhat.com>
> 
> It is a preparation work to be able to behave differently in the per
> architecture huge_pte_alloc() according to different VMA attributes.
> 
> Pass it deeper into huge_pmd_share() so that we can avoid the find_vma() call.
> 
> Suggested-by: Mike Kravetz <mike.kravetz@oracle.com>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
> ---
>  arch/arm64/mm/hugetlbpage.c   |  4 ++--
>  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   |  6 +-----
>  include/linux/hugetlb.h       |  5 +++--
>  mm/hugetlb.c                  | 15 ++++++++-------
>  mm/userfaultfd.c              |  2 +-
>  11 files changed, 24 insertions(+), 24 deletions(-)

Thanks, this will be needed for multiple features where pmd sharing must
be disabled.  And, the need to disable sharing is based on information in
the vma.

Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
-- 
Mike Kravetz

  reply	other threads:[~2021-02-12  0:01 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-10 21:21 [PATCH v5 00/10] userfaultfd: add minor fault handling Axel Rasmussen
2021-02-10 21:21 ` [PATCH v5 01/10] hugetlb: Pass vma into huge_pte_alloc() and huge_pmd_share() Axel Rasmussen
2021-02-11 23:59   ` Mike Kravetz [this message]
2021-02-10 21:21 ` [PATCH v5 02/10] hugetlb/userfaultfd: Forbid huge pmd sharing when uffd enabled Axel Rasmussen
2021-02-12  0:19   ` Mike Kravetz
2021-02-12 20:40     ` Peter Xu
2021-02-12 20:47       ` Axel Rasmussen
2021-02-12 21:27         ` Mike Kravetz
2021-02-10 21:21 ` [PATCH v5 03/10] mm/hugetlb: Move flush_hugetlb_tlb_range() into hugetlb.h Axel Rasmussen
2021-02-10 21:21 ` [PATCH v5 04/10] hugetlb/userfaultfd: Unshare all pmds for hugetlbfs when register wp Axel Rasmussen
2021-02-12 18:11   ` Mike Kravetz
2021-02-12 21:18     ` Peter Xu
2021-02-12 21:34       ` Mike Kravetz
2021-02-12 22:14         ` Peter Xu
2021-02-10 21:21 ` [PATCH v5 05/10] userfaultfd: add minor fault registration mode Axel Rasmussen
2021-02-11 19:28   ` Axel Rasmussen
2021-02-11 20:58     ` Axel Rasmussen
2021-02-12 22:21     ` Matthew Wilcox
2021-02-12 22:44       ` Peter Xu
2021-02-12 22:51         ` Axel Rasmussen
2021-02-12 23:01           ` Peter Xu
2021-02-12 19:17   ` Mike Kravetz
2021-02-12 19:33     ` Axel Rasmussen
2021-02-10 21:21 ` [PATCH v5 06/10] userfaultfd: disable huge PMD sharing for MINOR registered VMAs Axel Rasmussen
2021-02-10 21:21 ` [PATCH v5 07/10] userfaultfd: hugetlbfs: only compile UFFD helpers if config enabled Axel Rasmussen
2021-02-10 21:21 ` [PATCH v5 08/10] userfaultfd: add UFFDIO_CONTINUE ioctl Axel Rasmussen
2021-02-10 22:21   ` Axel Rasmussen
2021-02-10 21:21 ` [PATCH v5 09/10] userfaultfd: update documentation to describe minor fault handling Axel Rasmussen
2021-02-10 21:22 ` [PATCH v5 10/10] userfaultfd/selftests: add test exercising " Axel Rasmussen

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