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[Xen-devel] Future of 32-bit PV support


  • To: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "xen-users@xxxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxxx>, bouyer@xxxxxxxxxx
  • From: Juergen Gross <jgross@xxxxxxxx>
  • Date: Thu, 16 Aug 2018 08:17:13 +0200
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  • Delivery-date: Thu, 16 Aug 2018 06:17:40 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

In the Xen x86 community call we have been discussing whether anyone
really is depending on 32-bit PV guests. We'd like to evaluate whether
anyone would see problems with:

- deprecating 32-bit PV guest support in Xen, meaning that we'd
  eventually switch to support 32-bit PV guests only via PV-shim from
  Xen 4.12 or 4.13

- dropping 32-bit PV support from upstream Linux kernel, resulting in
  current 32-bit PV guests no longer being able to upgrade to the newest
  kernel version any longer

And related to that:

- is there any Linux distribution still shipping 32-bit PV-capable
  systems?

- what about BSD? Is 32-bit PV support important there?


Juergen

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