diff mbox series

[v4,10/10] userfaultfd: update documentation to mention shmem minor faults

Message ID 20210420220804.486803-11-axelrasmussen@google.com
State New
Headers show
Series userfaultfd: add minor fault handling for shmem | expand

Commit Message

Axel Rasmussen April 20, 2021, 10:08 p.m. UTC
Generally, the documentation we wrote for hugetlbfs-based minor faults
still all applies. The only missing piece is to mention the new feature
flag which indicates that the kernel supports this for shmem as well.

Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
---
 Documentation/admin-guide/mm/userfaultfd.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Hugh Dickins April 27, 2021, 2:27 a.m. UTC | #1
On Tue, 20 Apr 2021, Axel Rasmussen wrote:

> Generally, the documentation we wrote for hugetlbfs-based minor faults

> still all applies. The only missing piece is to mention the new feature

> flag which indicates that the kernel supports this for shmem as well.

> 

> Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>


Acked-by: Hugh Dickins <hughd@google.com>


(but could be folded into the one which defines UFFD_FEATURE_MINOR_SHMEM)

> ---

>  Documentation/admin-guide/mm/userfaultfd.rst | 3 ++-

>  1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/Documentation/admin-guide/mm/userfaultfd.rst b/Documentation/admin-guide/mm/userfaultfd.rst
index 3aa38e8b8361..6528036093e1 100644
--- a/Documentation/admin-guide/mm/userfaultfd.rst
+++ b/Documentation/admin-guide/mm/userfaultfd.rst
@@ -77,7 +77,8 @@  events, except page fault notifications, may be generated:
 
 - ``UFFD_FEATURE_MINOR_HUGETLBFS`` indicates that the kernel supports
   ``UFFDIO_REGISTER_MODE_MINOR`` registration for hugetlbfs virtual memory
-  areas.
+  areas. ``UFFD_FEATURE_MINOR_SHMEM`` is the analogous feature indicating
+  support for shmem virtual memory areas.
 
 The userland application should set the feature flags it intends to use
 when invoking the ``UFFDIO_API`` ioctl, to request that those features be