On Wed, 20 May 2020 at 14:25, Emmanuel Florac <eflorac@xxxxxxxxxxxxxx> wrote: > > Le Wed, 20 May 2020 11:14:30 +1000 > Dave Chinner <david@xxxxxxxxxxxxx> écrivait: > > > Well, there's a difference between what a distro that heavily > > patches the upstream kernel is willing to support and what upstream > > supports. And, realistically, v4 is going to be around for at least > > one more major distro release, which means the distro support time > > window is still going to be in the order of 15 years. > > IIRC, RedHat/CentOS v.7.x shipped with a v5-capable mkfs.xfs, but > defaulted to v4. That means that unless you were extremely cautious > (like I am :) 99% of RH/COs v7 will be running v4 volumes for the > coming years. How many years, would you ask? [Trying again hopefully without HTML] So initial RHEL/CentOS 7 releases did create XFS v4 file systems. However from RHEL/CentOS 7.3 [1] (circa Nov 2016) they are creating XFS v5 file systems by default. [1] RHEL 7.3 Release Notes > Chapter 9. File Systems https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.3_release_notes/new_features_file_systems # cat /etc/centos-release CentOS Linux release 7.8.2003 (Core) # mkfs.xfs -V mkfs.xfs version 4.5.0 # mkfs.xfs /dev/sdb13 ... # xfs_db -c version -r /dev/sdb13 versionnum [0xb4a5+0x18a] = V5,NLINK,DIRV2,ALIGN,LOGV2,EXTFLG,MOREBITS,ATTR2,LAZYSBCOUNT,PROJID32BIT,CRC,FTYPE
