On (Tue) Mar 23 2010 [12:04:28], Gerd Hoffmann wrote:
> On 03/23/10 11:52, Amit Shah wrote:
>
>>> With poll support done right (don't signal "writable" when not
>>> connected) this shouldn't be a issue. Apps retrying over and over
>>> without waiting for the filehandle becoming writable are broken by
>>> design.
>>
>> Yeah; poll returns POLLOUT only when the host connection is open. This
>> is for apps that write() without consulting poll().
>
> Well, /me just remembers this also depends on the file mode. Returning
> -EAGAIN instantly is fine for non-blocking file handles. For file
> handles in blocking mode you would have to block here, waiting for the
> host to connect.
Ah, right.
I didn't really look at blocking / non-blocking support in write()
because of the cpu_relax(), which will always block the app.
I'll add this.
Amit
_______________________________________________
Virtualization mailing list
[email protected]
https://lists.linux-foundation.org/mailman/listinfo/virtualization
