Re: [Qemu-devel] [PATCH] honor IDE_DMA_BUF_SECTORS

[Samuel Thibault]

Avi Kivity, le Fri 27 Mar 2009 13:53:31 +0300, a écrit :
> Maybe I'm confused by $subject.

Ah, ok.

> >>block-raw-posix need not do that, just a while loop.
> >
> >For the synchronous interface, yes. For the asynchronous interface,
> >short reads could happen too... (unfortunately we are aware of that too
> >late for queuing other requests and getting efficiency).
> 
> Currently block-raw-posix uses synchronous I/O even for asynchronous 
> requests (using threads) so the fix is the same in both cases.

Ow, right, we are not using any native AIO interface actually.

(not only related to qemu: I'm depressed when seeing how AIO is
standardized/supported/used in the Unix world...)

Samuel