Re: [Qemu-devel] [PATCH v2] block: make BDRV_POLL_WHILE() re-entrancy safe

On 03/07/2018 06:46 AM, Stefan Hajnoczi wrote: Nested BDRV_POLL_WHILE() calls can occur. Currently assert(!wait_->wakeup) fails in AIO_WAIT_WHILE() when this happens. This patch converts the bool wait_->need_kick flag to an unsigned wait_->num_waiters counter. Nesting works correctly because

[Qemu-devel] [PATCH v2] block: make BDRV_POLL_WHILE() re-entrancy safe

Nested BDRV_POLL_WHILE() calls can occur. Currently assert(!wait_->wakeup) fails in AIO_WAIT_WHILE() when this happens. This patch converts the bool wait_->need_kick flag to an unsigned wait_->num_waiters counter. Nesting works correctly because outer AIO_WAIT_WHILE() callers evaluate the