On 1/29/21 1:38 AM, Roman Kagan wrote: > During the final phase of migration the NBD reconnection logic may > encounter situations it doesn't expect during regular operation. > > This series addresses some of them that make qemu crash. They are > reproducible when a vm with a secondary drive attached via nbd with > non-zero "reconnect-delay" runs a stress load (fio with big queue depth) > in the guest on that drive and is migrated (e.g. to a file), while the > nbd server is SIGKILL-ed and restarted every second. > > See the individual patches for specific crash conditions and more > detailed explanations. > > v1 -> v2: > - fix corrupted backtraces in log messages > - add r-b by Vladimir >
Thanks, queuing through my NBD tree. > Roman Kagan (3): > block/nbd: only detach existing iochannel from aio_context > block/nbd: only enter connection coroutine if it's present > nbd: make nbd_read* return -EIO on error > > include/block/nbd.h | 7 ++++--- > block/nbd.c | 25 +++++++++++++++++-------- > 2 files changed, 21 insertions(+), 11 deletions(-) > -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org
