On 2018/10/17 上午5:27, Dmitry Katsubo wrote: > Dear btrfs team, > > I often observe kernel traces on linux-4.14.0 (mostly likely due to background > "btrfs scrub") which contain the following "characterizing" line (for the rest > see attachments): > > btrfs_remove_chunk+0x26a/0x7e0 [btrfs] > > I wonder if somebody from developers team knows anything about this problem. > It > seems like after such dump btfs volume continues to function OK.
It's a known minor problem. "btrfs rescue fix-device-size <device>" could fix it offline (unmounted) Or if you're using the fs as root fs, resize the fs by removing 4K would also solve the problem: # btrfs filesystem resize <devid>:-4K <mnt> The cause is old mkfs/kernel isn't aligning device size correctly, while later kernel is pretty picky about that alignment. It's mostly a developer oriented warning, no harm except a lot of scary kernel warning and may slow down log system. Thanks, Qu > > Thanks for any information! >
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