Re: [Qemu-devel] [PATCH v2 0/3] coroutinization of flush and discard (split out of NBD series)

[Kevin Wolf]

Am 17.10.2011 12:32, schrieb Paolo Bonzini:
> This series, applying on top of block branch, enables drivers to use
> coroutines for flush and discard.  I kept aio_discard after discussing
> with Kevin since it should be useful not only for raw-posix-aio, but also
> for the userspace iSCSI backend (and in general for backends relying on
> an external library that is designed around aio).
> 
> BTW, with this patch we get "for free" the invariant that bdrv_aio_*
> never returns a NULL acb (Stefan's patches already got to that point
> for read/write, of course).

Cool, I wasn't aware of that. That's a very nice side effect!

Maybe we should write this down in a comment and remove the now
unnecessary error handling from callers.

Kevin