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From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: david@fromorbit.com, darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org, xfs@oss.sgi.com
Subject: [PATCH 3/7] xfsdocs: update the on-disk format with changes for Linux 4.5
Date: Thu, 25 Aug 2016 16:27:16 -0700	[thread overview]
Message-ID: <147216763695.32447.8173128727182823319.stgit@birch.djwong.org> (raw)
In-Reply-To: <147216761636.32447.4229640006064129056.stgit@birch.djwong.org>

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 .../XFS_Filesystem_Structure/ondisk_inode.asciidoc |   19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)


diff --git a/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc b/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc
index 4aabc55..dc1fad2 100644
--- a/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc
+++ b/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc
@@ -66,9 +66,10 @@ of the literal area and +di_forkoff+. The attribute fork is located between
 [[Inode_Core]]
 == Inode Core
 
-The inode's core is 96 bytes in size and contains information about the file
-itself including most stat data information about data and attribute forks after
-the core within the inode. It uses the following structure:
+The inode's core is 96 bytes on a V4 filesystem and 176 bytes on a V5
+filesystem.  It contains information about the file itself including most stat
+data information about data and attribute forks after the core within the
+inode. It uses the following structure:
 
 [source, c]
 ----
@@ -313,8 +314,16 @@ Counts the number of changes made to the attributes in this inode.
 Log sequence number of the last inode write.
 
 *di_flags2*::
-Specifies extended flags associated with a v3 inode.  There are no flags defined
-currently.
+Specifies extended flags associated with a v3 inode.
+
+.Version 3 Inode flags
+[options="header"]
+|=====
+| Flag				| Description
+| +XFS_DIFLAG2_DAX+		|
+For a file, enable DAX to increase performance on persistent-memory storage.
+If set on a directory, files created in the directory will inherit this flag.
+|=====
 
 *di_pad2*::
 Padding for future expansion of the inode.

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  parent reply	other threads:[~2016-08-25 23:27 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-25 23:26 [PATCH v8 0/7] xfs-docs: reorganize chapters, document rmap and reflink Darrick J. Wong
2016-08-25 23:27 ` [PATCH 1/7] journaling_log: fix some typos in the section about EFDs Darrick J. Wong
2016-08-25 23:27 ` [PATCH 2/7] xfsdocs: document known testing procedures Darrick J. Wong
2016-08-25 23:27 ` Darrick J. Wong [this message]
2016-08-25 23:27 ` [PATCH 4/7] xfsdocs: move the discussions of short and long format btrees to a separate chapter Darrick J. Wong
2016-08-25 23:27 ` [PATCH 5/7] xfsdocs: reverse-mapping btree documentation Darrick J. Wong
2016-08-25 23:27 ` [PATCH 6/7] xfsdocs: document refcount btree and reflink Darrick J. Wong
2016-08-25 23:27 ` [PATCH 7/7] xfsdocs: document the realtime reverse mapping btree Darrick J. Wong
2016-09-08  1:38   ` Dave Chinner
2016-09-08  2:03     ` Darrick J. Wong

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