[REQUEST] Display all BTRFS subvolumes as one partition (i.e. Don't treat BTRFS subvolumes as individual partitions)

[KSXGitHub]

Is your feature request related to a problem? Please describe.

Btop has a section that monitor mounted partitions. Below is the Btop UI displaying my filesystem:

In the above screenshot, root, home, cache, and log are all subvolumes of the same BTRFS partition. They all have the exact same statistics (same "Used", same "Free", same "Total", and same "IO%"). Therefore, it is redundant to display all of them in different rows.

Describe the solution you'd like

Show only a single row for all subvolumes. The name of the row could either be the name of the partition, or a list of subvolume names (e.g. root,home,cache,log), or just the name of the most important subvolume (e.g. root).

Describe alternatives you've considered

Additional context

My fstab:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a device; this may
# be used with UUID= as a more robust way to name devices that works even if
# disks are added and removed. See fstab(5).
#
# <file system>                             <mount point>         <type>   <options>                                                                                               <dump> <pass>
UUID=F832-EB0A                              /boot                 vfat     defaults,noatime                                                                                            0      2

UUID=a036be94-037c-4bc5-a79c-2748298843dd   /                     btrfs    subvol=/@,defaults,noatime,space_cache,autodefrag,x-gvfs-icon=archlinux,x-gvfs-symbolic-icon=archlinux      0      1
UUID=a036be94-037c-4bc5-a79c-2748298843dd   /home                 btrfs    subvol=/@home,defaults,noatime,space_cache,autodefrag                                                       0      2
UUID=a036be94-037c-4bc5-a79c-2748298843dd   /var/cache            btrfs    subvol=/@cache,defaults,noatime,space_cache,autodefrag                                                      0      2
UUID=a036be94-037c-4bc5-a79c-2748298843dd   /var/log              btrfs    subvol=/@log,defaults,noatime,space_cache,autodefrag                                                        0      2

UUID=22df5457-fbb5-4df5-8460-3baea4cd0b97   /mnt/STORAGE4         btrfs    rw,nosuid,nodev,nofail,x-gvfs-show,x-gvfs-name=STORAGE4                                                     0      0
UUID=82a43590-0e4b-4c13-a2f5-ad442305fd58   /mnt/SS100            btrfs    rw,nosuid,nodev,nofail,x-gvfs-show,x-gvfs-name=SS100                                                        0      0
UUID=c25b8ff9-86cc-43f0-924e-e33ac4dfaa60   /mnt/DATA             btrfs    rw,nosuid,nodev,nofail,x-gvfs-show,x-gvfs-name=DATA                                                         0      0

[ysolis]

y bpytop it works on this way, it's my case, i have this in my /etc/fstab:

/dev/nvme0n1p1          /boot           vfat            rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro   0 2

/dev/nvme0n1p2          /               btrfs           rw,noatime,compress=zstd:3,ssd,space_cache=v2,user_subvol_rm_allowed,autodefrag,commit=300,subvol=/@root        0 0
/dev/nvme0n1p2          /home           btrfs           rw,noatime,compress=zstd:3,ssd,space_cache=v2,user_subvol_rm_allowed,autodefrag,commit=300,subvol=/@home        0 0
/dev/nvme0n1p2          /var            btrfs           rw,noatime,compress=zstd:3,ssd,space_cache=v2,user_subvol_rm_allowed,autodefrag,commit=300,subvol=/@var         0 0
/dev/nvme0n1p2          /.snapshots     btrfs           rw,noatime,compress=zstd:3,ssd,space_cache=v2,user_subvol_rm_allowed,autodefrag,commit=300,subvol=/@snapshots   0 0

subvolumes for / (root), /home, /var and /.snapshots directories

and i have this in bpytop

we like to have something similar with btop

[tau0-deltav]

I'd quite like this. I've spent quite a while fiddling with the exclude= option and various arrangements of "@/" and it's invariably all or nothing.

I think this is a bug, reporting unrestricted btrfs subvolumes as separate storage is just incorrect.

If displaying them correctly isn't trivial then it'd be better to not show them at all, because they crowd out my other devices and I am but a humble 1080peasant.