On 2017-11-18 10:08, Hans van Kranenburg wrote:
On 11/18/2017 01:49 AM, Tomasz Chmielewski wrote:
I'm getting the following BUG when running balance on one of my
systems:
[ 3458.698704] BTRFS info (device sdb3): relocating block group
306045779968 flags data|raid1
[ 3466.892933] BTRFS info (device sdb3): found 2405 extents
[ 3495.408630] BTRFS info (device sdb3): found 2405 extents
[ 3498.161144] ------------[ cut here ]------------
[ 3498.161150] kernel BUG at
/home/kernel/COD/linux/fs/btrfs/ctree.c:1856!
[ 3498.161264] invalid opcode: 0000 [#1] SMP
(...)
[ 3498.164523] Call Trace:
[ 3498.164694] tree_advance+0x16e/0x1d0 [btrfs]
[ 3498.164874] btrfs_compare_trees+0x2da/0x6a0 [btrfs]
[ 3498.165078] ? process_extent+0x1580/0x1580 [btrfs]
[ 3498.165264] btrfs_ioctl_send+0xe94/0x1120 [btrfs]
It's using send + balance at the same time. There's something that
makes
btrfs explode when you do that.
It's not new in 4.14, I have seen it in 4.7 and 4.9 also, various
different explosions in kernel log. Since that happened, I made sure I
never did those two things at the same time.
Indeed, send was started when balance was running.
Thanks for the hint.
Tomasz Chmielewski
https://lxadm.com
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