[PATCH 011/145] man: document the DAX fsxattr inode flag

[Darrick J. Wong]

Document the new inode flag in struct fsxattr for DAX.

Signed-off-by: Darrick J. Wong <darrick.wong at oracle.com>
---
 man/man3/xfsctl.3 |    5 +++++
 1 file changed, 5 insertions(+)


diff --git a/man/man3/xfsctl.3 b/man/man3/xfsctl.3
index e84b829..9e7f138 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