| Date | Sat, 4 Oct 2014 08:13:36 +0900 | From | Mike Hommey <> | Subject | Re: [PATCH 08/17] mm: madvise MADV_USERFAULT |
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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
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