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| author | Venkatesh Pallipadi <venki@google.com> | 2011-02-10 10:23:27 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-17 15:37:26 -0800 |
| commit | 3b7d4d545694e8754f212518d80662f2d03a918d (patch) | |
| tree | ddcf64dc4517c88a51e28d4098be11d942dd6302 /Documentation | |
| parent | 5e7ce6ec134635a572ca0457ed2460dfe70337ea (diff) | |
| download | linux-stable-3b7d4d545694e8754f212518d80662f2d03a918d.tar.gz linux-stable-3b7d4d545694e8754f212518d80662f2d03a918d.tar.bz2 linux-stable-3b7d4d545694e8754f212518d80662f2d03a918d.zip | |
x86: Add IRQ_TIME_ACCOUNTING
Commit: e82b8e4ea4f3dffe6e7939f90e78da675fcc450e upstream
This patch adds IRQ_TIME_ACCOUNTING option on x86 and runtime enables it
when TSC is enabled.
This change just enables fine grained irq time accounting, isn't used yet.
Following patches use it for different purposes.
Signed-off-by: Venkatesh Pallipadi <venki@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1286237003-12406-6-git-send-email-venki@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 8d16a0013343..c840e7d6c4a4 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2578,6 +2578,10 @@ and is between 256 and 4096 characters. It is defined in the file disables clocksource verification at runtime. Used to enable high-resolution timer mode on older hardware, and in virtualized environment. + [x86] noirqtime: Do not use TSC to do irq accounting. + Used to run time disable IRQ_TIME_ACCOUNTING on any + platforms where RDTSC is slow and this accounting + can add overhead. turbografx.map[2|3]= [HW,JOY] TurboGraFX parallel port interface |