This bug was nominated against a series that is no longer supported, ie
vivid. The bug task representing the vivid nomination is being closed
as Won't Fix.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu Vivid)
Status: Fix Committed => Won't Fix
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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 Committed
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 <[email protected]>
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 <[email protected]>
[mpe: Update comment and change log to be more precise]
Signed-off-by: Michael Ellerman <[email protected]>
---
arch/powerpc/platforms/powernv/smp.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
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