Some of the disks on my system were missing and I was able to hit
this issue.
----------------
Check tree block failed, want=12582912, have=0
read block failed check_tree_block
Couldn't read chunk root
warning devid 2 not found already
Check tree block failed, want=143360, have=0
read block failed check_tree_block
Couldn't read chunk root
warning, device 4 is missing
warning, device 3 is missing
warning, device 2 is missing
warning, device 1 is missing
----------------
Did a bisect and it leads to this following patch.
----------------
commit 915902c5002485fb13d27c4b699a73fb66cc0f09
btrfs-progs: fix device missing of btrfs fi show with seed devices
----------------
Also this patch stalls ~2sec in the cmd btrfs fi show, on my system
with 48 disks.
Also a simple test case hits some warnings...
----------------
mkfs.btrfs -draid1 -mraid1 /dev/sdb /dev/sdc
mount /dev/sdb /btrfs && fillfs /btrfs 100 && umount /btrfs
wipefs -a /dev/sdb
modprobe -r btrfs && modprobe btrfs
mount -o degraded /dev/sdb /btrfs
btrfs fi show
Label: none uuid: 9844cd05-1c8c-473e-a84b-bac95aab7bc9
Total devices 2 FS bytes used 1.59MiB
devid 2 size 967.87MiB used 104.75MiB path /dev/sdc
*** Some devices missing
warning, device 1 is missing
warning, device 1 is missing
warning devid 1 not found already
----------------
On 10/23/14 14:57, Petr Janecek wrote:
Hello,
You have mentioned two issues when balance and fi show running
concurrently
my mail was a bit chaotic, but I get the stalls even on idle system.
Today I got
parent transid verify failed on 1559973888000 wanted 1819 found 1821
parent transid verify failed on 1559973888000 wanted 1819 found 1821
parent transid verify failed on 1559973888000 wanted 1819 found 1821
parent transid verify failed on 1559973888000 wanted 1819 found 1821
Ignoring transid failure
leaf parent key incorrect 1559973888000
from 'btrfs fi sh' while I was just copying something, no balance running.
[...]
[PATCH 1/1] btrfs-progs: code optimize cmd_scan_dev() use
btrfs_register_one_device()
[PATCH 1/2] btrfs-progs: introduce btrfs_register_all_device()
[PATCH 2/2] btrfs-progs: optimize btrfs_scan_lblkid() for multiple calls
If you could, pls..
Now on 3.17 apply above 3 patches and see if you see any better
performance for the stalling issue.
no perceptible change: takes ~40 seconds both before and after
applying. Old version <1 sec.
can you do same steps on 3.16 and report what you observe
So many rejects -- do you have older versions of these patches?
Thanks,
Petr
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