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Hello
During testing, I tried to create small BtrFS images (256M, 1G) and
just fill them up with large (100M) files. During these tests df -h
showed 130M at the time BtrFS reported "disk is full".
/dev/loop2 1.0G 895M 130M 88% /root/mnt/loop
One-byte files (80K+) allow to reproduce
/dev/loop2 1.0G 49M 976M 5% /root/mnt/loop
(and disk-full behavior) with Kernel BUG in
__btrfs_reserve_extent+0x351/0x35f , but that seems to be well-known.
Maybe df -i could be useful until metadata/data split is flexible? Is
there any way to inspect the metadata filling up and change the split?
Michael Raskin
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