[MISFEATURE] Size reporting on small devices

[MISFEATURE] Size reporting on small devices

[Michael Raskin]

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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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Re: [MISFEATURE] Size reporting on small devices

[Michael Raskin]

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Michael Raskin wrote:
> 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?

By the way, resizing down and then up seems to help - at least I was
able to create more files..
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