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| author | Dimitri Sivanich <[email protected]> | 2010-11-16 22:23:52 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2010-11-18 09:41:25 +0000 |
| commit | 8191c9f69202d4dbc66063cb92059b8a58640d34 (patch) | |
| tree | 97efeba3b3224390bfac251ecb9e4a037c544453 /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py | |
| parent | x86: Use online node real index in calulate_tbl_offset() (diff) | |
| download | kernel-8191c9f69202d4dbc66063cb92059b8a58640d34.tar.gz kernel-8191c9f69202d4dbc66063cb92059b8a58640d34.zip | |
x86: UV: Address interrupt/IO port operation conflict
This patch for SGI UV systems addresses a problem whereby
interrupt transactions being looped back from a local IOH,
through the hub to a local CPU can (erroneously) conflict with
IO port operations and other transactions.
To workaound this we set a high bit in the APIC IDs used for
interrupts. This bit appears to be ignored by the sockets, but
it avoids the conflict in the hub.
Signed-off-by: Dimitri Sivanich <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
___
arch/x86/include/asm/uv/uv_hub.h | 4 ++++
arch/x86/include/asm/uv/uv_mmrs.h | 19 ++++++++++++++++++-
arch/x86/kernel/apic/x2apic_uv_x.c | 25 +++++++++++++++++++++++--
arch/x86/platform/uv/tlb_uv.c | 2 +-
arch/x86/platform/uv/uv_time.c | 4 +++-
5 files changed, 49 insertions(+), 5 deletions(-)
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py')
0 files changed, 0 insertions, 0 deletions