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David Alan Gilbert" , Mina Almasry , Oliver Upton Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 67DFBA000391 X-Stat-Signature: gi65mzsmawayhmkpistktzy577oq6pus Received-SPF: none (flex--axelrasmussen.bounces.google.com>: No applicable sender policy available) receiver=imf24; identity=mailfrom; envelope-from="<3Wop4YA0KCFs3Q7EK3LFNLL7G9HH9E7.5HFEBGNQ-FFDO35D.HK9@flex--axelrasmussen.bounces.google.com>"; helo=mail-yb1-f201.google.com; client-ip=209.85.219.201 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1618512468-897917 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 --- Documentation/admin-guide/mm/userfaultfd.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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 -- 2.31.1.368.gbe11c130af-goog