btrfs filesystem sync

[evinrude]

What I need to do is

A) delete a snapshot
B) wait until the snapshot is deleted and the reduction in space used is reflected

so first I do

btrfs subvolume delete -C /somebtrfsvol/somesnap

so then I want to

btrfs filesystem sync ?

If I do

btrfs filesystem sync /somebtrfsvol

no errors are thrown but I'm not sure it does what I want

if I do

btrfs filesystem sync /somebtrfsvol/somesnap

an error is produced

the manpage describes this feature thus

sync <path> [subvolid...]

but I cannot find any examples of just what is allowed for <path> and/or [subvolid...]

[jlittle]

man btrfs-filesystem says

... sync ... starts cleaning of deleted subvolumes. To wait for the subvolume deletion to
complete use the btrfs subvolume sync command.

(my emphasis)

[evinrude]

wow . How much time have I stared at this with my brain saying I was doing 'subvolme sync' when in fact I was doing 'filesytem sync'
Oh well , like the man said , I'm frequently wrong thats how I occasionally get to right :}

[GreyGeek]

Do worry ... the older you get the worse it gets.

[jlittle]

... I'm frequently wrong thats how I occasionally get to right

The human condition.