Comment 9 for bug 632346

This time better nice :-) Think a found a way to let work ext4 freeze free.

Somewhere I found that there are sometimes data losses using ext4 which can lead to an Xlock

By adding nodelalloc into fstab it solved the problem.
So now I replaced my fstab rule

UUID=4b636bec-6ab8-46e2-97a7-9ad8616520b3 / ext4 errors=remount-ro 0 1

Into

UUID=4b636bec-6ab8-46e2-97a7-9ad8616520b3 / ext4 rw,relatime,errors=remount-ro,nodelalloc 0 1

so i added rw,relatime,nodelalloc.

Performance when freeze occurs was 98 MB/s before I modified the fstab rule
Performance after I modified the fstab rule 89 MB/s

So a lost a bit but off performance but Copied already over 300 GB erased it and no freeze occurd anymore

gr christophe