On Fri, 2020-11-06 at 11:18 +0000, Patrick O'Callaghan wrote:
> On Fri, 2020-11-06 at 05:43 +0000, Qiyu Yan wrote:
> > You can use swapfile on btrfs with nocow
> > [...]
> > https://wiki.archlinux.org/index.php/btrfs#Swap_file for instructions
>
> Great. I was actually wondering about precisely that, so I'm glad to
> see it's supported with the right incantations.
Trying to follow the instructions in the above URL, but clearly I'm
misunderstanding something:
# btrfs sub create /SWAP
Create subvolume '//SWAP'
# btrfs property set /SWAP compression no
# btrfs sub show /SWAP
root/SWAP
Name: SWAP
UUID: 1d4d839a-fd4e-d345-8d3f-ea858af71982
Parent UUID: -
Received UUID: -
Creation time: 2020-11-06 11:41:37 +0000
Subvolume ID: 1311
Generation: 14657
Gen at creation: 14547
Parent ID: 257
Top level ID: 257
Flags: -
Snapshot(s):
# cd /SWAP
# truncate -s 0 ./swapfile
# chattr +C /SWAP
chattr: Invalid argument while setting flags on /SWAP
What am I missing?
poc
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