From a481a58042521520f31d1d531cccfa05576fb1f9 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 19 Aug 2016 09:29:41 +1000 Subject: [PATCH] man: document the DAX fsxattr inode flag Document the new inode flag in struct fsxattr for DAX. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- man/man3/xfsctl.3 | 5 +++++ 1 file changed, 5 insertions(+) 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 -- 2.47.2