| commit | e736ad548db152776de61d7a26805cfae77ce5ce | |
| author | Pallipadi, Venkatesh <venkatesh.pallipadi@intel.com> | |
| Sat, 7 Feb 2009 00:52:05 +0000 (6 16:52 -0800) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Mon, 9 Feb 2009 10:15:15 +0000 (9 11:15 +0100) | ||
| tree | bab2cb6560f2e038ccebf891cd847f37fd61a1b8 | treesnapshot (tar.gz zip) |
| parent | 0cd5c3c80a0ebd68c08312fa7d8c13149cc61c4c | commitdiff |
x86: add clflush before monitor for Intel 7400 series
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>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| arch/x86/include/asm/cpufeature.h | diffblobblamehistory | |
| arch/x86/kernel/cpu/intel.c | diffblobblamehistory | |
| arch/x86/kernel/process.c | diffblobblamehistory |