Re: [Xen-devel] Oldest supported Xen version in upstream QEMU (Was: Re: [Minios-devel] [PATCH v2 0/15+5+5] Begin to disentangle libxenctrl and provide some stable libraries)

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 23 Sep 2015, Ian Campbell wrote:
> On Tue, 2015-09-22 at 22:31 +0100, Stefano Stabellini wrote: 
> > The oldest Xen version I build-test for every pull request is Xen 4.0.0,
> > I think it is very reasonable to remove anything older than that.
> > I am OK with removing Xen 4.0.0 too, but I would like a warning to be
> > sent ahead of time to qemu-devel to see if anybody complains.
> 
> There is not much point in removing <=3.4 support and keeping 4.0, since
> 4.0.0 was the last one which used a plain int as a handle, anything older
> than 4.0.0 is trivial if 4.0.0 is supported.
> 
> One approach I am considering in order to keep 4.0.0 support and earlier
> was to turn the "int fd" for <=4.0 into a pointer by having the open
> wrapper do malloc(sizeof int) and the using wrappers do xc_foo(*handle).
> 
> This way all the different variants take pointers and we have less hoops to
> jump through to typedef everything in the correct way for each variant.
> 
> If you would rather avoid doing that then I think dropping 4.0.0 support
> would be the way to go and I'll send a mail to qemu-devel.
 
I would rather drop 4.0 support.

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