Re: [bug report] NBD: rbd-nbd + ext4 stuck after nbd resized

[Ming Lei <ming.lei@redhat.com>]

On Wed, Oct 21, 2020 at 09:08:10AM +0800, lining wrote:
> (Sorry for sending this mail again, this one add nbd@other.debian.org)
> 
> Hi kernel、ceph comunity:
> 
> We run into an issue that mainly related to the (kernel) nbd driver and (ceph) rbd-nbd. 
> After some investigations, I found that the root cause of the problem seems to be related to the change in the block size of nbd.
> 
> I am not sure whether it is the nbd driver or rbd-nbd bug, however there is such a problem.
> 
> 
> What happened：
> It will always hang when accessing the mount point of nbd device with ext4 after nbd resized. 
> 
> 
> Environment information:
> - kernel:               v4.19.25 or master
> - rbd-nbd(ceph):  v12.2.0 Luminous or master
> - the fs of nbd:    ext4

Hello lining,

Can you reproduce this issue on v5.9 kernel?


Thanks,
Ming