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| author | Michael Neuling <mikey@neuling.org> | 2010-04-28 13:39:41 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-07-05 11:08:42 -0700 |
| commit | 4be4e01c7d844bbb7b88a2bcf931ac00408289c3 (patch) | |
| tree | e31445f9e3e902e67de44ecf7f13484e2c113a73 /lib | |
| parent | ae7aff994d0934d86a3278a65889f34629c778a7 (diff) | |
| download | lwn-4be4e01c7d844bbb7b88a2bcf931ac00408289c3.tar.gz lwn-4be4e01c7d844bbb7b88a2bcf931ac00408289c3.zip | |
powerpc/pseries: Only call start-cpu when a CPU is stopped
commit aef40e87d866355ffd279ab21021de733242d0d5 upstream.
Currently we always call start-cpu irrespective of if the CPU is
stopped or not. Unfortunatley on POWER7, firmware seems to not like
start-cpu being called when a cpu already been started. This was not
the case on POWER6 and earlier.
This patch checks to see if the CPU is stopped or not via an
query-cpu-stopped-state call, and only calls start-cpu on CPUs which
are stopped.
This fixes a bug with kexec on POWER7 on PHYP where only the primary
thread would make it to the second kernel.
Reported-by: Ankita Garg <ankita@linux.vnet.ibm.com>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions