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Description of problem: For now we have to enable allocation of PGSTE globally, using sysctl vm.allocate_pgste=1 (see bz 1454281) in order to be able to run qemu-kvm guests. This results in the double size of lowest level page tables of all processes. Latest upstream contribution allow to allocate PGSTE selectively, per process. This requires kernel, QEMU and binutil changes. Additional info: We have to backport for the binutils part the following commit commit b4cbbe8f7294070cc93a71ace78f134965ddad82 Author: Andreas Krebbel <krebbel.ibm.com> Date: Thu Jun 8 17:24:50 2017 +0200 S/390: Add support for pgste marker
Verified with binutils-2.27-27.base.el7.s390x.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:0686