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From: Axel Rasmussen <axelrasmussen@google.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Hugh Dickins <hughd@google.com>,
	Jerome Glisse <jglisse@redhat.com>, Joe Perches <joe@perches.com>,
	Lokesh Gidra <lokeshgidra@google.com>,
	Mike Kravetz <mike.kravetz@oracle.com>,
	Mike Rapoport <rppt@linux.vnet.ibm.com>,
	Peter Xu <peterx@redhat.com>, Shaohua Li <shli@fb.com>,
	Shuah Khan <shuah@kernel.org>,
	Stephen Rothwell <sfr@canb.auug.org.au>,
	Wang Qing <wangqing@vivo.com>
Cc: linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
	linux-mm@kvack.org, Axel Rasmussen <axelrasmussen@google.com>,
	Brian Geffon <bgeffon@google.com>,
	"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
	Mina Almasry <almasrymina@google.com>,
	Oliver Upton <oupton@google.com>
Subject: [PATCH v3 10/10] userfaultfd: update documentation to mention shmem minor faults
Date: Thu, 15 Apr 2021 11:47:32 -0700
Message-ID: <20210415184732.3410521-11-axelrasmussen@google.com> (raw)
In-Reply-To: <20210415184732.3410521-1-axelrasmussen@google.com>

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(-)

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


  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-15 18:47 [PATCH v3 00/10] userfaultfd: add minor fault handling for shmem Axel Rasmussen
2021-04-15 18:47 ` [PATCH v3 01/10] userfaultfd/hugetlbfs: avoid including userfaultfd_k.h in hugetlb.h Axel Rasmussen
2021-04-15 18:47 ` [PATCH v3 02/10] userfaultfd/shmem: combine shmem_{mcopy_atomic,mfill_zeropage}_pte Axel Rasmussen
2021-04-15 18:47 ` [PATCH v3 03/10] userfaultfd/shmem: support UFFDIO_CONTINUE for shmem Axel Rasmussen
2021-04-15 18:47 ` [PATCH v3 04/10] userfaultfd/shmem: support minor fault registration " Axel Rasmussen
2021-04-15 18:47 ` [PATCH v3 05/10] userfaultfd/selftests: use memfd_create for shmem test type Axel Rasmussen
2021-04-15 18:47 ` [PATCH v3 06/10] userfaultfd/selftests: create alias mappings in the shmem test Axel Rasmussen
2021-04-15 18:47 ` [PATCH v3 07/10] userfaultfd/selftests: reinitialize test context in each test Axel Rasmussen
2021-04-15 18:47 ` [PATCH v3 08/10] userfaultfd/selftests: exercise minor fault handling shmem support Axel Rasmussen
2021-04-15 18:47 ` [PATCH v3 09/10] userfaultfd/shmem: modify shmem_mcopy_atomic_pte to use install_ptes Axel Rasmussen
2021-04-15 18:47 ` Axel Rasmussen [this message]
2021-04-15 19:12 ` [PATCH v3 00/10] userfaultfd: add minor fault handling for shmem Hugh Dickins
2021-04-20 21:28   ` Axel Rasmussen

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