Re: [RFC PATCH 0/3] Use DIAG318 to set Control Program Name & Version Codes

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On Fri, Aug 31, 2018 at 03:31:09PM -0400, Collin Walling wrote:
> On 08/31/2018 12:51 PM, Collin Walling wrote:
> > A new diagnose instruction, 318, allows the kernel to set an 8-byte "Control 
> > Program Code" (CPC) that is composed of:
> > 
> >     1-byte Control Program Name Code (CPNC)
> >     7-byte Control Program Version Code (CPVC) composed of:
> >         3-bytes for Linux Kernel version (determined at build-time)
> >         3-bytes for Distribution Identifier (referred to as distro_id; set by Kconfig option)
> >         1-byte trailing NULL
> > 
> > Note about distro_id:
> > [
> > The initial idea for the 3-byte distro_id is for each distribution to set 
> > three characters that correspond to their distribution name (for a theoretical 
> > distributor "ACME," they could set "ACM" as the distro_id). A registry file 
> > could be included in the s390 kernel documentation to avoid name collisions.
> > ]
> 
> Another (likely better) idea is to use 1-byte for the distribution, followed
> by 2-bytes for major.minor release.

That's sounds indeed better.

Thanks and regards,
  Hendrik




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