From: Darrick J. Wong Date: Tue, 1 Mar 2022 18:45:40 +0000 (-0500) Subject: mkfs: add a config file for x86_64 pmem filesystems X-Git-Tag: v5.15.0-rc1~6 X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=a3e224084c7a269f6cc9e5117e0af350987e91b3;p=thirdparty%2Fxfsprogs-dev.git mkfs: add a config file for x86_64 pmem filesystems 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 Reviewed-by: Eric Sandeen Signed-off-by: Eric Sandeen --- diff --git a/mkfs/Makefile b/mkfs/Makefile index 0aaf9d069..55d9362f6 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 000000000..3a6ae9883 --- /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