** Changed in: linux (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1425004
Title:
powerpc/powernv: Ignore smt-enabled on Power8 and later
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Utopic:
Won't Fix
Status in linux source package in Vivid:
Won't Fix
Bug description:
Hi Ubuntu kernel folks,
This patch isn't quite upstream stable material, but might still be nice to
have. It prevents smt-enabled=off on the kernel command line causing a hung
system at boot.
cheers
===
From: Greg Kurz <gk...@linux.vnet.ibm.com>
Commit d70a54e2d08510a99b1f10eceeae6f2f7086e226 upstream.
Starting with POWER8, the subcore logic relies on all threads of a core
being booted so that they can participate in split mode switches. So on
those machines we ignore the smt_enabled_at_boot setting (smt-enabled on
the kernel command line).
Signed-off-by: Greg Kurz <gk...@linux.vnet.ibm.com>
[mpe: Update comment and change log to be more precise]
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
---
arch/powerpc/platforms/powernv/smp.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
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