Messages in this thread | | | Date | Tue, 17 Dec 2013 14:15:01 +0530 | Subject | Re: [PATCH 1/3] powernow-k6: disable cache when changing frequency | From | Viresh Kumar <> |
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On 12 December 2013 06:08, Mikulas Patocka <mpatocka@redhat.com> wrote: > During frequency transition the processor is in "EPM Stop Grant" state. > The documentation says that the processor doesn't respond to inquiry > requests in this state. Consequently, coherency of processor caches and > bus master devices is not maintained, causing the system instability. > > This patch flushes the cache during frequency transition. It fixes the > instability.
I don't have much idea of these systems but wouldn't this affect performance badly?
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