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Commit 44f4c054 authored by Matthew Wilcox's avatar Matthew Wilcox Committed by Al Viro
Browse files

dax: Add block size note to documentation 



For block devices which are small enough, mkfs will default to creating
a filesystem with block sizes smaller than page size.

Signed-off-by: default avatarMatthew Wilcox <willy@linux.intel.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 5ba97d28

Documentation/filesystems/dax.txt

+4 −2
Original line number Diff line number Diff line
@@ -18,8 +18,10 @@ Usage 
-----



If you have a block device which supports DAX, you can make a filesystem

on it as usual.  When mounting it, use the -o dax option manually

or add 'dax' to the options in /etc/fstab.

on it as usual.  The DAX code currently only supports files with a block

size equal to your kernel's PAGE_SIZE, so you may need to specify a block

size when creating the filesystem.  When mounting it, use the "-o dax"

option on the command line or add 'dax' to the options in /etc/fstab.





Implementation Tips for Block Driver Writers