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| author | Len Brown <len.brown@intel.com> | 2011-01-19 04:48:27 +0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2011-02-18 01:08:46 +0300 |
| commit | 14796fca2bd22acc73dd0887248d003b0f441d08 (patch) | |
| tree | 45281c00405077fe1a099d585588d2173ee90fea /arch/x86/include/asm/processor-flags.h | |
| parent | 100b33c8bd8a3235fd0b7948338d6cbb3db3c63d (diff) | |
| download | linux-14796fca2bd22acc73dd0887248d003b0f441d08.tar.xz | |
intel_idle: disable NHM/WSM HW C-state auto-demotion
Hardware C-state auto-demotion is a mechanism where the HW overrides
the OS C-state request, instead demoting to a shallower state,
which is less expensive, but saves less power.
Modern Linux should generally get exactly the states it requests.
In particular, when a CPU is taken off-line, it must not be demoted, else
it can prevent the entire package from reaching deep C-states.
https://bugzilla.kernel.org/show_bug.cgi?id=25252
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/x86/include/asm/processor-flags.h')
0 files changed, 0 insertions, 0 deletions