On Thu 16 Nov 2017 12:21:50 PM CET, Stefan Hajnoczi wrote: > tg->any_timer_armed[] must be cleared when detaching pending timers from > the AioContext. Failure to do so leads to hung I/O because it looks > like there are still timers pending when in fact they have been removed. > > Other ThrottleGroupMembers might have requests pending too so it's > necessary to schedule the next TGM so it can set a timer. > > This patch fixes hung I/O when QEMU is launched with drives that are in > the same throttling group: > > (guest)$ dd if=/dev/zero of=/dev/vdb oflag=direct bs=512 & > (guest)$ dd if=/dev/zero of=/dev/vdc oflag=direct bs=512 & > (qemu) stop > (qemu) cont > ...I/O is stuck... > > Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
Reviewed-by: Alberto Garcia <be...@igalia.com> Berto
