Re: [Qemu-devel] [PATCH] Allow adjustment of http block device's readahead size.

[Anthony Liguori]

Alexander Graf wrote:
> On 29.06.2009, at 15:45, Anthony Liguori wrote:
>
> > Nolan wrote:
> > > Allow adjustment of http block device's readahead size, via the
> > > environment variable "HTTP_READAHEAD_SIZE".
> > >
> > > Signed-off-by: Nolan Leake <nolan <at> sigbus.net>
> >
> > I'd rather a command line option than an environmental variable.
>
> Wouldn't it make sense to pass arbitrary options via -drive to backends?
>
> That way we could have -drive 
> file=http://sample.com/test.iso,http-readahead=1024.

Where it gets complex is that you probably want those options to be 
included as qcow2 backing_file too.  I've thought about this in the past 
and haven't been able to come to a great solution.

Regards,

Anthony Liguori

> Alex