@tom-leiming I've tested this patch and I am able to mount a bcache device on top of virtio disks without hangs or the original BUG_ON on startup. Please add my 'Tested-By' in the patch upstream.
Thanks, -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1359146 Title: Kernel crash when mounting bcache on a vm with virtio Status in “linux” package in Ubuntu: Confirmed Status in “linux” source package in Trusty: Fix Released Bug description: bcache used in a virtual machine: If you create a bcache device with caching device and backing device on virtio disks, it will let you do your work until you mount it where it crashes the virtual machine (virtual machine is utopic, host is trusty). For example: if your backing device is /dev/vdb, and your caching device is /dev/vdc: sudo make-bcache -B /dev/vdc -C /dev/vdb --writeback is ok mkfs.ext4 /dev/bcache0 -L bcache-test is ok but mount /dev/bcache0 /media/bcache make it crash, if I remember well one time I had a few seconds before crash, but I don't have any log files. qemu-system-x86 is version 2.0.0+dfsg-2ubuntu1.2 Re-installing, and using IDE virtual interface seems to create and mount the bcache device is ok. After bcache created an mounted successfully with IDE interfaces, switching to SATA, SCSI, and USB with booting and mounting seemed ok. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1359146/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp