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| author | Pavel Emelyanov <xemul@parallels.com> | 2017-02-22 15:42:40 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-22 16:41:28 -0800 |
| commit | 05ce77249d5068b057082d24ec22d3824f4816ac (patch) | |
| tree | 818c65b8517abe7dcfd655b590d4c587dad098fe /mm/madvise.c | |
| parent | 90794bf19dc19691a16b71bcd75c04094d9e392d (diff) | |
| download | lwn-05ce77249d5068b057082d24ec22d3824f4816ac.tar.gz lwn-05ce77249d5068b057082d24ec22d3824f4816ac.zip | |
userfaultfd: non-cooperative: add madvise() event for MADV_DONTNEED request
If the page is punched out of the address space the uffd reader should
know this and zeromap the respective area in case of the #PF event.
Link: http://lkml.kernel.org/r/20161216144821.5183-14-aarcange@redhat.com
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michael Rapoport <RAPOPORT@il.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 0e3828eae9f8..06ffb5a170de 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -10,6 +10,7 @@ #include <linux/syscalls.h> #include <linux/mempolicy.h> #include <linux/page-isolation.h> +#include <linux/userfaultfd_k.h> #include <linux/hugetlb.h> #include <linux/falloc.h> #include <linux/sched.h> @@ -477,6 +478,7 @@ static long madvise_dontneed(struct vm_area_struct *vma, return -EINVAL; zap_page_range(vma, start, end - start, NULL); + madvise_userfault_dontneed(vma, prev, start, end); return 0; } |