Hello
I just installed
http://www.linuxcnc.org/testing-stretch-rtpreempt/linuxcnc-stretch-uspace-amd64-r13.iso
I reformatted a partition as ext4 to hold this installation.
Then I made a screenshot of latency-histogram
and rebooted to my workhorse debian 7 to compare latencies.
I found I could not mount the debian 9 ext4 partition from the debian 7
system.
Then I read that theres changes in the ext4 fs that cause this. ( its a
known problem ).
Then I 'fixed' the problem by booting the debian 9
and issuing
sudo tune2fs -O ^metadata_csum /dev/sda1
( sda1 for my installation ymv )
please warn others on the install pages that formatting a partition as
ext4 will be problematic when accessed by older debians.
thanks TomP
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