On 2019/7/6 下午1:13, Vladimir Panteleev wrote:
[...]
>> I'm not sure if it's the degraded mount cause the problem, as the
>> enospc_debug output looks like reserved/pinned/over-reserved space has
>> taken up all space, while no new chunk get allocated.
> 
> The problem happens after replace-ing the missing device (which succeeds
> in full) and then attempting to remove it, i.e. without a degraded mount.
> 
>> Would you please try to balance metadata to see if the ENOSPC still
>> happens?
> 
> The problem also manifests when attempting to rebalance the metadata.

Have you tried to balance just one or two metadata block groups?
E.g using -mdevid or -mvrange?

And did the problem always happen at the same block group?

Thanks,
Qu
> 
> Thanks!
>