From: Bobby Powers <bobbypowers@gmail.com>
To: Peter Xu <peterx@redhat.com>
Cc: linux-mm@kvack.org,
Kernel development list <linux-kernel@vger.kernel.org>,
David Hildenbrand <david@redhat.com>,
Hugh Dickins <hughd@google.com>, Maya Gokhale <gokhale2@llnl.gov>,
Jerome Glisse <jglisse@redhat.com>,
Pavel Emelyanov <xemul@virtuozzo.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Martin Cracauer <cracauer@cons.org>,
Denis Plotnikov <dplotnikov@virtuozzo.com>,
Shaohua Li <shli@fb.com>, Andrea Arcangeli <aarcange@redhat.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
Marty McFadden <mcfadden8@llnl.gov>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Mel Gorman <mgorman@suse.de>,
"Kirill A . Shutemov" <kirill@shutemov.name>,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>
Subject: Re: [PATCH v5 00/25] userfaultfd: write protection support
Date: Mon, 17 Feb 2020 19:59:12 -0800 [thread overview]
Message-ID: <CAArOQ2Vbpyu=JGfWNgOSQbXe15WzAB6VSah1OV8Cbx99bf0AXA@mail.gmail.com> (raw)
In-Reply-To: <20190620022008.19172-1-peterx@redhat.com>
On Wed, Jun 19, 2019 at 7:20 PM Peter Xu <peterx@redhat.com> wrote:
> This series implements initial write protection support for
> userfaultfd. Currently both shmem and hugetlbfs are not supported
> yet, but only anonymous memory. This is the 4nd version of it.
>
> The latest code can also be found at:
>
> https://github.com/xzpeter/linux/tree/uffd-wp-merged
Hi Peter - I ported the branch you had above on top of v5.4.20 (what I
happened to be running locally), and fixed one issue that was causing
crashes for me:
https://github.com/bpowers/linux/commit/61086b5a0fa4aeb494e86d999926551a4323b84f
I wrote a small test program here:
https://github.com/plasma-umass/Mesh/blob/master/src/test/userfaultfd-kernel-copy.cc
and write protection support for userfaultfd (with eventual shmem
support) would be _hugely_ helpful for a userspace memory allocator
I'm working on.
Is there anything I can do to help get this considered for mainline?
We have some time before the 5.7 merge window opens up.
Tested-by: Bobby Powers <bobbypowers@gmail.com>
next prev parent reply other threads:[~2020-02-18 4:01 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-20 2:19 [PATCH v5 00/25] userfaultfd: write protection support Peter Xu
2019-06-20 2:19 ` [PATCH v5 01/25] mm: gup: rename "nonblocking" to "locked" where proper Peter Xu
2019-06-20 2:19 ` [PATCH v5 02/25] mm: userfault: return VM_FAULT_RETRY on signals Peter Xu
2019-06-22 18:02 ` Linus Torvalds
2019-06-22 18:02 ` Linus Torvalds
2019-06-24 7:42 ` Peter Xu
2019-06-24 13:31 ` Linus Torvalds
2019-06-24 13:31 ` Linus Torvalds
2019-06-25 5:30 ` Peter Xu
2019-06-26 1:59 ` Linus Torvalds
2019-06-26 1:59 ` Linus Torvalds
2019-06-26 7:43 ` Peter Xu
2019-06-20 2:19 ` [PATCH v5 03/25] userfaultfd: don't retake mmap_sem to emulate NOPAGE Peter Xu
2019-06-20 2:19 ` [PATCH v5 04/25] mm: allow VM_FAULT_RETRY for multiple times Peter Xu
2019-06-20 2:19 ` [PATCH v5 05/25] mm: gup: " Peter Xu
2019-06-20 2:19 ` [PATCH v5 06/25] userfaultfd: wp: add helper for writeprotect check Peter Xu
2019-06-20 2:19 ` [PATCH v5 07/25] userfaultfd: wp: hook userfault handler to write protection fault Peter Xu
2019-06-20 2:19 ` [PATCH v5 08/25] userfaultfd: wp: add WP pagetable tracking to x86 Peter Xu
2019-06-20 2:19 ` [PATCH v5 09/25] userfaultfd: wp: userfaultfd_pte/huge_pmd_wp() helpers Peter Xu
2019-06-20 2:19 ` [PATCH v5 10/25] userfaultfd: wp: add UFFDIO_COPY_MODE_WP Peter Xu
2019-06-20 2:19 ` [PATCH v5 11/25] mm: merge parameters for change_protection() Peter Xu
2019-06-20 2:19 ` [PATCH v5 12/25] userfaultfd: wp: apply _PAGE_UFFD_WP bit Peter Xu
2019-06-20 2:19 ` [PATCH v5 13/25] userfaultfd: wp: drop _PAGE_UFFD_WP properly when fork Peter Xu
2019-06-20 2:19 ` [PATCH v5 14/25] userfaultfd: wp: add pmd_swp_*uffd_wp() helpers Peter Xu
2019-06-20 2:19 ` [PATCH v5 15/25] userfaultfd: wp: support swap and page migration Peter Xu
2019-06-20 2:19 ` [PATCH v5 16/25] khugepaged: skip collapse if uffd-wp detected Peter Xu
2019-06-20 2:20 ` [PATCH v5 17/25] userfaultfd: introduce helper vma_find_uffd Peter Xu
2019-06-20 2:20 ` [PATCH v5 18/25] userfaultfd: wp: support write protection for userfault vma range Peter Xu
2019-06-20 2:20 ` [PATCH v5 19/25] userfaultfd: wp: add the writeprotect API to userfaultfd ioctl Peter Xu
2019-06-20 2:20 ` [PATCH v5 20/25] userfaultfd: wp: enabled write protection in userfaultfd API Peter Xu
2019-06-20 2:20 ` [PATCH v5 21/25] userfaultfd: wp: don't wake up when doing write protect Peter Xu
2019-06-20 2:20 ` [PATCH v5 22/25] userfaultfd: wp: UFFDIO_REGISTER_MODE_WP documentation update Peter Xu
2019-06-20 2:20 ` [PATCH v5 23/25] userfaultfd: wp: declare _UFFDIO_WRITEPROTECT conditionally Peter Xu
2019-06-20 2:20 ` [PATCH v5 24/25] userfaultfd: selftests: refactor statistics Peter Xu
2019-06-20 2:20 ` [PATCH v5 25/25] userfaultfd: selftests: add write-protect test Peter Xu
2019-06-23 8:39 ` [PATCH v5 10/25] userfaultfd: wp: add UFFDIO_COPY_MODE_WP Hillf Danton
2020-02-18 3:59 ` Bobby Powers [this message]
2020-02-18 3:59 ` [PATCH v5 00/25] userfaultfd: write protection support Bobby Powers
2020-02-18 16:11 ` Peter Xu
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