Message ID | 20220226025227.GW8313@magnolia (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | None | expand |
On 2/25/22 8:52 PM, Darrick J. Wong wrote: > From: Darrick J. Wong <djwong@kernel.org> > > We have a handful of users who continually ping the maintainer with > questions about why pmem and dax don't work quite the way they want > (which is to say 2MB extents and PMD mappings) because they copy-pasted > some garbage from Google that's wrong. Encode the correct defaults into > a mkfs config file and ship that. > > Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Eric Sandeen <sandeen@redhat.com>
diff --git a/mkfs/Makefile b/mkfs/Makefile index 0aaf9d06..55d9362f 100644 --- a/mkfs/Makefile +++ b/mkfs/Makefile @@ -10,6 +10,7 @@ LTCOMMAND = mkfs.xfs HFILES = CFILES = proto.c xfs_mkfs.c CFGFILES = \ + dax_x86_64.conf \ lts_4.19.conf \ lts_5.4.conf \ lts_5.10.conf \ diff --git a/mkfs/dax_x86_64.conf b/mkfs/dax_x86_64.conf new file mode 100644 index 00000000..3a6ae988 --- /dev/null +++ b/mkfs/dax_x86_64.conf @@ -0,0 +1,19 @@ +# mkfs.xfs configuration file for persistent memory on x86_64. +# Block size must match page size (4K) and we require V5 for the DAX inode +# flag. Set extent size hints and stripe units to encourage the filesystem to +# allocate PMD sized (2MB) blocks. + +[block] +size=4096 + +[metadata] +crc=1 + +[data] +su=2m +sw=1 +extszinherit=512 +daxinherit=1 + +[realtime] +extsize=2097152