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| author |   Paul Mackerras <paulus@samba.org> | 2011-12-05 19:35:32 +0000 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-12-08 14:22:53 +1100 |
| commit | cba313da5c8ddbe6bba74c9f2b8f6d9e0bc0e723 (patch) | |
| tree | d98c1ca63240f2f13dbaac9769d08da9803d2647 /tools/perf/scripts/python | |
| parent | powerpc/pseries: Increase minimum RMO size from 64MB to 256MB (diff) | |
| download | linux-dev-cba313da5c8ddbe6bba74c9f2b8f6d9e0bc0e723.tar.xz linux-dev-cba313da5c8ddbe6bba74c9f2b8f6d9e0bc0e723.zip | |
powerpc/powernv: Fix problems in onlining CPUs
At present, on the powernv platform, if you off-line a CPU that was
online, and then try to on-line it again, the kernel generates a
warning message "OPAL Error -1 starting CPU n". Furthermore, if the
CPU is a secondary thread that was used by KVM while it was off-line,
the CPU fails to come online.
The first problem is fixed by only calling OPAL to start the CPU the
first time it is on-lined, as indicated by the cpu_start field of its
PACA being zero. The second problem is fixed by restoring the
cpu_start field to 1 instead of 0 when using the CPU within KVM.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions