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From: Carlos Maiolino <cmaiolino@redhat.com>
To: linux-xfs@vger.kernel.org
Subject: [PATCH V2] Add dax mount option to man xfs(5)
Date: Tue,  6 Apr 2021 13:56:12 +0200	[thread overview]
Message-ID: <20210406115613.19211-1-cmaiolino@redhat.com> (raw)

Details are already in kernel's documentation, but make dax mount option
information accessible through xfs(5) manpage.

Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
---

Changelog:
	V2:
	 - Add changes suggested by Darrick on his review.

 man/man5/xfs.5 | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/man/man5/xfs.5 b/man/man5/xfs.5
index 7642662f..372dc08a 100644
--- a/man/man5/xfs.5
+++ b/man/man5/xfs.5
@@ -133,6 +133,23 @@ by the filesystem.
 CRC enabled filesystems always use the attr2 format, and so
 will reject the noattr2 mount option if it is set.
 .TP
+.BR dax=value
+Set CPU direct access (DAX) behavior for the current filesystem. This mount
+option accepts the following values:
+
+"dax=inode" DAX will be enabled only on regular files with FS_XFLAG_DAX applied.
+
+"dax=never" DAX will not be enabled for any files. FS_XFLAG_DAX will be ignored.
+
+"dax=always" DAX will be enabled for all regular files, regardless of the
+FS_XFLAG_DAX state.
+
+If no option is used when mounting a filesystem stored on a DAX capable device,
+dax=inode will be used as default.
+
+For details regarding DAX behavior in kernel, please refer to kernel's
+documentation at filesystems/dax.txt
+.TP
 .BR discard | nodiscard
 Enable/disable the issuing of commands to let the block
 device reclaim space freed by the filesystem.  This is
-- 
2.30.2


             reply	other threads:[~2021-04-06 11:56 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-06 11:56 Carlos Maiolino [this message]
2021-04-06 13:57 ` [PATCH V2] Add dax mount option to man xfs(5) Darrick J. Wong

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