On 7/20/20 4:00 AM, Vladimir Sementsov-Ogievskiy wrote:
On shutdown nbd driver may be in a connecting state. We should shutdown
it as well, otherwise we may hang in
nbd_teardown_connection, waiting for conneciton_co to finish in
BDRV_POLL_WHILE(bs, s->connection_co) loop if remote server is down.
How to reproduce the dead lock:
Same reproducer as in the previous patch (again, where a temporary sleep
or well-placed gdb breakpoint may be more reliable than running two
process loops).
Signed-off-by: Vladimir Sementsov-Ogievskiy <[email protected]>
---
block/nbd.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
Reviewed-by: Eric Blake <[email protected]>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
