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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-03-23 19:31:15 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-04-02 19:30:02 +0200 |
| commit | b38b24ead33417146e051453d04bf60b8d2d7e25 (patch) | |
| tree | 9f9801c5b10dd5a57b07deaace6fd12a36740d65 /arch/x86/kernel/tsc.c | |
| parent | 85257024096a96fc5c00ce59d685f62bbed3ad95 (diff) | |
| download | blackbird-op-linux-b38b24ead33417146e051453d04bf60b8d2d7e25.tar.gz blackbird-op-linux-b38b24ead33417146e051453d04bf60b8d2d7e25.zip | |
perf, x86: Fix AMD hotplug & constraint initialization
Commit 3f6da39 ("perf: Rework and fix the arch CPU-hotplug hooks") moved
the amd northbridge allocation from CPUS_ONLINE to CPUS_PREPARE_UP
however amd_nb_id() doesn't work yet on prepare so it would simply bail
basically reverting to a state where we do not properly track node wide
constraints - causing weird perf results.
Fix up the AMD NorthBridge initialization code by allocating from
CPU_UP_PREPARE and installing it from CPU_STARTING once we have the
proper nb_id. It also properly deals with the allocation failing.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
[ robustify using amd_has_nb() ]
Signed-off-by: Stephane Eranian <eranian@google.com>
LKML-Reference: <1269353485.5109.48.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/tsc.c')
0 files changed, 0 insertions, 0 deletions
