On 2019/1/25 下午3:39, Stefan K wrote: > Hello, > > if I run 'bonnie++ -c4' the system is unusable and hangs, I got also some > CallTraces in my syslog. Is that a normal behavior? > > My system is: > uname -a > Linux tani 4.19.0-0.bpo.1-amd64 #1 SMP Debian 4.19.12-1~bpo9+1 (2018-12-30) > x86_64 GNU/Linux > > btrfs fi sh > Label: none uuid: 24be286b-ece6-4481-aa48-af255e96e5bd > Total devices 2 FS bytes used 128.89GiB > devid 1 size 219.84GiB used 131.03GiB path /dev/sdb2 > devid 2 size 219.84GiB used 131.03GiB path /dev/sde2 > > both are new SSDs: > smartctl -i /dev/sdb > smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.19.0-0.bpo.1-amd64] (local > build) > Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org > > === START OF INFORMATION SECTION === > Device Model: SAMSUNG MZ7LM240HMHQ-00005 > Serial Number: S2TWNX0KA02412 > LU WWN Device Id: 5 002538 c40b988bf > Firmware Version: GXT5404Q > User Capacity: 240,057,409,536 bytes [240 GB] > Sector Size: 512 bytes logical/physical > Rotation Rate: Solid State Device > Form Factor: 2.5 inches > Device is: Not in smartctl database [for details use: -P showall] > ATA Version is: ACS-2, ATA8-ACS T13/1699-D revision 4c > SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) > Local Time is: Fri Jan 25 08:37:49 2019 CET > SMART support is: Available - device has SMART capability. > SMART support is: Enabled > > > if I run this I got this output in my /var/log/syslog: > > Jan 25 08:19:20 tani kernel: [ 480.733545] WARNING: CPU: 8 PID: 8564 at > /build/linux-Ut6wTa/linux-4.19.12/fs/btrfs/ctree.h:1588 > btrfs_update_device+0x1b2/0x1c0 [btrfs]
This is a known bug for older created btrfs with unaligned device size. You could resize the fs by -4K and it should make the warning disappear. Or you can use offline tool, "btrfs rescue fix-device-size" to fix it offline. Thanks, Qu
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