Re: [Qemu-devel] Do we need CONFIG_AIO?

[Anthony Liguori <anthony@codemonkey.ws>]

Stefano Stabellini wrote:
> Christoph Hellwig wrote:
>
>   
>> Currently all aio code in the raw-posix block driver depends on a
>> CONFIG_AIO symbol that gets set based on the availability of the
>> pthreads library.  Beeing able to rely on unconditional aio support
>> means we could remove the whole code for plain bdrv_read/bdrv_write
>> in raw-posix.c which is about 300 lines of code and a duplicated code
>> path.  Is there any Posix-ish platform qemu supports that does not
>> have pthreads support?
>>
>>     
>
> MiniOS.
> I would appreciate if you keep that flag.
>   

Threads are not going to be able to remain an optional dependency 
forever.  I would be willing to merge something to remove CONFIG_AIO 
although I expect that there will be some fall out.  Some people are 
using --disable-aio today for either historic reasons or because there 
are weird bugs with AIO enabled.

Regards,

Anthony Liguori