Package: btrfs-progs
Version: 4.7.3-1
Severity: important

Dear Maintainer,

the command btrfs fi show takes too much time:

time btrfs fi show              
Label: none  uuid: 513dc574-e8bc-4336-b181-00d1e9782c1c
Total devices 2 FS bytes used 2.34GiB
devid    1 size 927.79GiB used 4.03GiB path /dev/sdv2
devid    2 size 927.79GiB used 4.03GiB path /dev/sdar2

real    12m59.763s
user    0m0.008s
sys     0m0.044s


time btrfs fi show
Label: none  uuid: 513dc574-e8bc-4336-b181-00d1e9782c1c
Total devices 2 FS bytes used 2.34GiB
devid    1 size 927.79GiB used 4.03GiB path /dev/sdv2
devid    2 size 927.79GiB used 4.03GiB path /dev/sdar2

real    6m22.498s
user    0m0.012s
sys     0m0.024s


time btrfs fi show
Label: none  uuid: 513dc574-e8bc-4336-b181-00d1e9782c1c
Total devices 2 FS bytes used 2.34GiB
devid    1 size 927.79GiB used 4.03GiB path /dev/sdv2
devid    2 size 927.79GiB used 4.03GiB path /dev/sdar2

real    6m19.796s
user    0m0.012s
sys     0m0.024s


Maybe its related to that I've some harddisk in my system:
ls /dev/disk/by-path/ |grep -v part |wc -l
44


-- System Information:
Debian Release: 9.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-5-amd64 (SMP w/20 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages btrfs-progs depends on:
ii  e2fslibs    1.43.4-2
ii  libblkid1   2.29.2-1
ii  libc6       2.24-11+deb9u1
ii  libcomerr2  1.43.4-2
ii  liblzo2-2   2.08-1.2+b2
ii  libuuid1    2.29.2-1
ii  zlib1g      1:1.2.8.dfsg-5

btrfs-progs recommends no packages.

btrfs-progs suggests no packages.

-- no debconf information

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