Re: [Qemu-devel] [PATCH] aio-posix: Fix return value of aio_poll()

[Paolo Bonzini]

> > > If I reset/suspend/resume/ the VM during a backup job run I get:
> > >
> > > block.c:1221: bdrv_drain_all: Assertion
> > > `((&bs->tracked_requests)->lh_first
> > == ((void *)0))' failed.
> > > Aborted
> > >
> > > I am not 100% sure, but I think a simple qemu_aio_wait() is not
> > > enough
> > > to ensure that a copy-on-write action has finished.
> > 
> > Are you using timers in any way?
> 
> Yes, I call co_sleep_ns(rt_clock, delay) to limit rate to output
> stream.

Use block_job_sleep_ns instead, and only call it when no I/O
is pending.

Paolo