[SRU][Artful][PATCH 0/3] Fixes for LP:1739498

Joseph Salisbury joseph.salisbury at canonical.com
Fri Feb 16 15:37:23 UTC 2018

BugLink: http://bugs.launchpad.net/bugs/1739498

== SRU Justification ==
IBM is seeing a crash on Power9 when running on Artful.
This issue happens only when disabling RPT ("disable_radix"), which is not the default in Artful.
The trace and details of the crash are posted to the bug.

These fixes are already in Bionic master-next, so they are only being requested 
in Artful.

== Fixes ==
63ee9b2ff9d3 ("powerpc/mm/book3s64: Make KERN_IO_START a variable")
b5048de04b32 ("powerpc/mm/slb: Move comment next to the code it's")
21a0e8c14bf6 ("powerpc/mm/hash64: Make vmalloc 56T on hash")

== Regression Potential ==
These commits are specific to powerpc and fix a crash.

== Test Case ==
A test kernel was built with these patches and tested by the original bug reporter.
The bug reporter states the test kernel resolved the bug.

Michael Ellerman (3):
  powerpc/mm/book3s64: Make KERN_IO_START a variable
  powerpc/mm/slb: Move comment next to the code it's referring to
  powerpc/mm/hash64: Make vmalloc 56T on hash

 arch/powerpc/include/asm/book3s/64/hash.h    |  6 ++++--
 arch/powerpc/include/asm/book3s/64/pgtable.h |  3 ++-
 arch/powerpc/include/asm/book3s/64/radix.h   |  2 ++
 arch/powerpc/mm/hash_utils_64.c              |  1 +
 arch/powerpc/mm/pgtable-radix.c              |  1 +
 arch/powerpc/mm/pgtable_64.c                 |  2 ++
 arch/powerpc/mm/slb_low.S                    | 23 ++++++++++++++++++-----
 7 files changed, 30 insertions(+), 8 deletions(-)


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