On Tue, May 20, 2014 at 02:50:10PM +0100, Astro Xe wrote: > > On my box, the "used" value in the output of "btrfs filesystem df" is not > updated in a timely manner, after that one or more subvolumes have been > deleted. I need to execute "btrfs filesystem sync", in order to update the > value. > > How do I fix this? Or, could someone fix this in btrfs-progs, please?
I've not tested this, but I think you need one of the two -c/-C options to btrfs sub del, which perform a synchronous delete. Once the command returns, you can be assured that the subvolume has actually been deleted and any extents freed up. > I suspect the cause is that subvolumes are marked immediately as deleted, but > cleaned up at a later time, is this right? Correct. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Great oxymorons of the world, no. 10: Business Ethics ---
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