Messages in this thread | | | Date | Mon, 9 Feb 2009 11:15:52 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86: Add clflush before monitor for Intel 7400 series - v2 |
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* Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com> wrote:
> For Intel 7400 series CPUs, the recommendation is to use a clflush on the > monitored address just before monitor and mwait pair [1]. This clflush makes sure > that there are no false wakeups from mwait when the monitored address was recently > written to. > > [1] "MONITOR/MWAIT Recommendations for Intel Xeon Processor 7400 series" > section in specification update document of 7400 series > http://download.intel.com/design/xeon/specupdt/32033601.pdf > > Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> > > --- > > Earlier patch: > http://marc.info/?l=linux-kernel&m=122341330606025&w=2 > > Current changes: > Minor modification based on Peter's comment > > arch/x86/include/asm/cpufeature.h | 1 + > arch/x86/kernel/cpu/intel.c | 3 +++ > arch/x86/kernel/process.c | 6 ++++++ > 3 files changed, 10 insertions(+)
applied to tip/x86/urgent, thanks Venki!
Ingo
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