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Re: [Qemu-devel] [PATCH 08/17] mm: madvise MADV_USERFAULT
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From: |
Mike Hommey |
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Subject: |
Re: [Qemu-devel] [PATCH 08/17] mm: madvise MADV_USERFAULT |
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Date: |
Sat, 4 Oct 2014 08:13:36 +0900 |
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User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Fri, Oct 03, 2014 at 07:07:58PM +0200, Andrea Arcangeli wrote:
> MADV_USERFAULT is a new madvise flag that will set VM_USERFAULT in the
> vma flags. Whenever VM_USERFAULT is set in an anonymous vma, if
> userland touches a still unmapped virtual address, a sigbus signal is
> sent instead of allocating a new page. The sigbus signal handler will
> then resolve the page fault in userland by calling the
> remap_anon_pages syscall.
What does "unmapped virtual address" mean in this context?
Mike
- Re: [Qemu-devel] [PATCH 10/17] mm: rmap preparation for remap_anon_pages, (continued)
Re: [Qemu-devel] [PATCH 10/17] mm: rmap preparation for remap_anon_pages, Kirill A. Shutemov, 2014/10/07
[Qemu-devel] [PATCH 02/17] mm: gup: add get_user_pages_locked and get_user_pages_unlocked, Andrea Arcangeli, 2014/10/03
[Qemu-devel] [PATCH 05/17] mm: gup: use get_user_pages_fast and get_user_pages_unlocked, Andrea Arcangeli, 2014/10/03
[Qemu-devel] [PATCH 12/17] mm: sys_remap_anon_pages, Andrea Arcangeli, 2014/10/03
[Qemu-devel] [PATCH 17/17] userfaultfd: implement USERFAULTFD_RANGE_REGISTER|UNREGISTER, Andrea Arcangeli, 2014/10/03
[Qemu-devel] [PATCH 08/17] mm: madvise MADV_USERFAULT, Andrea Arcangeli, 2014/10/03
Re: [Qemu-devel] [PATCH 08/17] mm: madvise MADV_USERFAULT, Andrea Arcangeli, 2014/10/07
Re: [Qemu-devel] [PATCH 08/17] mm: madvise MADV_USERFAULT, Kirill A. Shutemov, 2014/10/07
Re: [Qemu-devel] [PATCH 00/17] RFC: userfault v2, zhanghailiang, 2014/10/27