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Re: [Xen-devel] [PATCH v2] arch/x86/xen: remove depends on CONFIG_EXPERIMENTAL



On Thu, 28 Feb 2013, Kees Cook wrote:
> On Thu, Feb 28, 2013 at 2:53 PM, Stefano Stabellini
> <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> > On Thu, 28 Feb 2013, Kees Cook wrote:
> >> The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
> >> while now and is almost always enabled by default. As agreed during the
> >> Linux kernel summit, remove it from any "depends on" lines in Kconfigs.
> >>
> >> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
> >> Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> >> Cc: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
> >> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> >> ---
> >>
> >> v2:
> >>  - drop EXPERIMENTAL from bool and help text too.
> >>
> >> ---
> >>  arch/x86/xen/Kconfig |    8 +++-----
> >>  1 file changed, 3 insertions(+), 5 deletions(-)
> >>
> >> diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
> >> index 93ff4e1..6c5802f 100644
> >> --- a/arch/x86/xen/Kconfig
> >> +++ b/arch/x86/xen/Kconfig
> >> @@ -52,12 +52,10 @@ config XEN_DEBUG_FS
> >>         Enabling this option may incur a significant performance overhead.
> >>
> >>  config XEN_X86_PVH
> >> -     bool "Support for running as a PVH guest (EXPERIMENTAL)"
> >> -     depends on X86_64 && XEN && EXPERIMENTAL
> >> +     bool "Support for running as a PVH guest"
> >> +     depends on X86_64 && XEN
> >>       default n
> >>       help
> >>          This option enables support for running as a PVH guest (PV guest
> >>          using hardware extensions) under a suitably capable hypervisor.
> >> -        This option is EXPERIMENTAL because the hypervisor interfaces
> >> -        which it uses is not yet considered stable therefore backwards and
> >> -        forwards compatibility is not yet guaranteed.  If unsure, say N.
> >> +        If unsure, say N.
> >
> > Please do not change the text this way.
> > The fact that CONFIG_EXPERIMENTAL is going away it doesn't change the
> > fact that this feature is experimental.
> > Maybe you want to replace EXPERIMENTAL with experimental, or if
> > experimental has become as taboo word, I am sure you can find a suitable
> > synonym.
> 
> Ah, sorry, I misunderstood what was being recommended from the other
> thread (quoting below...)
> 
> On Sat, 23 Feb 2013, Konrad Rzeszutek Wilk wrote:
> > It certainly is unstable right now (which is why it was unstaged from
> > the v3.9 train). I hope that by v3.10 it won't be - at which
> > point this patch (and the EXPERIMENTAL) makes sense.
> 
> Only "depends on EXPERIMENTAL" must go away. Did you want either the
> bool or help text to go away too? If neither, my original patch should
> work. If you only want the bool text gone, I can send that version
> instead.

I think your original patch is good, but I'll let Konrad decide.

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