From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Thu, 18 Aug 2016 23:29:41 +0000 (+1000)
Subject: man: document the DAX fsxattr inode flag
X-Git-Tag: v4.8.0-rc1~46
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a481a58042521520f31d1d531cccfa05576fb1f9;p=thirdparty%2Fxfsprogs-dev.git

man: document the DAX fsxattr inode flag

Document the new inode flag in struct fsxattr for DAX.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---

diff --git a/man/man3/xfsctl.3 b/man/man3/xfsctl.3
index e84b829d2..9e7f13826 100644
--- a/man/man3/xfsctl.3
+++ b/man/man3/xfsctl.3
@@ -225,6 +225,11 @@ group and so files within different directories will not interleave
 extents on disk. The reservation is only active while files are being
 created and written into the directory.
 .TP
+.SM "Bit 15 (0x8000) \- XFS_XFLAG_DAX"
+If the filesystem lives on directly accessible persistent memory, reads and
+writes to this file will go straight to the persistent memory, bypassing the
+page cache.
+.TP
 .SM "Bit 31 (0x80000000) \- XFS_XFLAG_HASATTR"
 The file has extended attributes associated with it.
 .RE