Re: [PATCH] aio-wait: avoid AioContext lock in aio_wait_bh_oneshot()

[Emanuele Giuseppe Esposito]

Am 04/04/2023 um 17:33 schrieb Stefan Hajnoczi:
> There is no need for the AioContext lock in aio_wait_bh_oneshot().
> It's easy to remove the lock from existing callers and then switch from
> AIO_WAIT_WHILE() to AIO_WAIT_WHILE_UNLOCKED() in aio_wait_bh_oneshot().
> 
> Document that the AioContext lock should not be held across
> aio_wait_bh_oneshot(). Holding a lock across aio_poll() can cause
> deadlock so we don't want callers to do that.
> 
> This is a step towards getting rid of the AioContext lock.
> 
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> 
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>