Re: [PATCH 08/17] mm: madvise MADV_USERFAULT
From: Mike Hommey <hidden>
Date: 2014-10-03 23:42:14
Also in:
kvm, linux-mm, lkml, qemu-devel
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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>