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[v3,10/10] userfaultfd: update documentation to mention shmem minor faults

Message ID 20210415184732.3410521-11-axelrasmussen@google.com (mailing list archive)
State New
Headers show
Series userfaultfd: add minor fault handling for shmem | expand

Commit Message

Axel Rasmussen April 15, 2021, 6:47 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(-)
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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