> 2023年1月27日 20:44，Andrea Tomassetti <andrea.tomassetti-opensource@xxxxxxxx> 写道： > > From 83f490ec8e81c840bdaf69e66021d661751975f2 Mon Sep 17 00:00:00 2001 > From: Andrea Tomassetti <andrea.tomassetti-opensource@xxxxxxxx> > Date: Thu, 8 Sep 2022 09:47:55 +0200 > Subject: [PATCH v2] bcache: Add support for live resize of backing devices > > Signed-off-by: Andrea Tomassetti <andrea.tomassetti-opensource@xxxxxxxx> > --- > Hi Coly, > this is the second version of the patch. As you correctly pointed out, > I implemented roll-back functionalities in case of error. > I'm testing this funcionality using QEMU/KVM vm via libvirt. > Here the steps: > 1. make-bcache --writeback -B /dev/vdb -C /dev/vdc > 2. mkfs.xfs /dev/bcache0 > 3. mount /dev/bcache0 /mnt > 3. dd if=/dev/random of=/mnt/random0 bs=1M count=1000 > 4. md5sum /mnt/random0 | tee /mnt/random0.md5 > 5. [HOST] virsh blockresize <vm-name> --path <disk-path> --size <new-size> > 6. xfs_growfs /dev/bcache0 > 6. Repeat steps 3 and 4 with a different file name (e.g. random1.md5) > 7. umount/reboot/remount and check that the md5 hashes are correct with > md5sum -c /mnt/random?.md5 [snipped] Hi Andrea, For the above step 5, could you provide a specific command line for me to reproduce? I tried to resize the disk by virus from 400G to 800G, the disk resize doesn’t happen online, I have to stop and restart the virtual machine and see the resized disk. Thanks. Coly Li
