> > But when I use a thread it triggers the bug in bdrv_drain_all(). So
> > how can I fix bdrv_drain_all() if I use a separate thread to write data?
>
> The bug is, in all likelihood, in your own code. Sorry. :)
yes. I still not fully understand that aio code.
If I detect a incomplete write, I register an aio handler like this:
ret = write(fd, buf, count)
if (ret < 0 && (errno == EAGAIN || errno == EWOULDBLOCK) ) {
...
qemu_aio_set_fd_handler(fd, NULL, vma_co_continue_write, NULL,
mydata);
qemu_coroutine_yield();
But seems that qemu_aio_wait() returns false after that.
I thought that should return true instead?
