[PATCH openbmc] Force OLDEST_KERNEL to 4.4.0

[Rick Altherr]

Until we understand the upgrade scenarios better, I prefer to leave it
fixed to the earliest released kernel version.

On Tue, Jul 5, 2016 at 12:47 PM, Patrick Williams <patrick at stwcx.xyz> wrote:

> On Thu, Jun 30, 2016 at 05:26:29PM +0930, Joel Stanley wrote:
> > On Thu, Jun 30, 2016 at 8:10 AM, OpenBMC Patches
> > <openbmc-patches at stwcx.xyz> wrote:
> > > From: Patrick Williams <patrick at stwcx.xyz>
> > >
> > > This is the oldest kernel currently used by openbmc, so there is no
> > > point in compiling glibc support older kernels.
> >
> > Sounds good. Buildroot does the same thing for our firmware builds on
> the host.
> >
> > Is there any way to use the actual kernel version to set this variable?
> >
>
> I might be able to set OLDEST_KERNEL in terms of LINUX_KERNEL.  Is that
> what we want?  I have a little concern that this might affect certain
> use cases of code upgrade (or downgrade) and netbooting.
>
> The saving for this setting ended up being pretty insignificant.  About
> 7k from glibc.  I can either leave this as something we change for
> "major" upgrades of openBMC or attempt to set it in terms of the
> LINUX_KERNEL variable.
>
> > >
> > > Signed-off-by: Patrick Williams <patrick at stwcx.xyz>
> > > ---
> > >  meta-phosphor/conf/distro/openbmc-phosphor.conf | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/meta-phosphor/conf/distro/openbmc-phosphor.conf
> b/meta-phosphor/conf/distro/openbmc-phosphor.conf
> > > index f37e88c..b4e6f7a 100644
> > > --- a/meta-phosphor/conf/distro/openbmc-phosphor.conf
> > > +++ b/meta-phosphor/conf/distro/openbmc-phosphor.conf
> > > @@ -5,6 +5,7 @@ DISTRO_NAME = "Phosphor OpenBMC (Phosphor OpenBMC
> Project Reference Distro)"
> > >  DISTRO_VERSION = "0.1.0"
> > >  TARGET_VENDOR="-openbmc"
> > >
> > > +OLDEST_KERNEL = "4.4.0"
> > >  GCCVERSION ?= "4.9.3"
> > >  IMAGE_FSTYPES += "cpio.gz"
> > >  IMAGE_FSTYPES += "squashfs-xz"
> > > --
> > > 2.9.0
> > >
> > >
> > > _______________________________________________
> > > openbmc mailing list
> > > openbmc at lists.ozlabs.org
> > > https://lists.ozlabs.org/listinfo/openbmc
>
> --
> Patrick Williams
>
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> openbmc at lists.ozlabs.org
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>
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