Re: [PATCH 08/17] mm: madvise MADV_USERFAULT

[Mike Hommey]

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/