On Wed, Oct 21, 2020 at 09:08:10AM +0800, lining wrote: > (Sorry for sending this mail again, this one add nbd@xxxxxxxxxxxxxxxx) > > 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