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* C1E auto-promotion suspend/resume
@ 2016-03-14  1:39 Andy Lutomirski
  2016-03-14  4:31 ` Brown, Len
  0 siblings, 1 reply; 9+ messages in thread
From: Andy Lutomirski @ 2016-03-14  1:39 UTC (permalink / raw)
  To: Len Brown, linux-kernel@vger.kernel.org

Hi-

By BIOS (1.2.3 on a Dell XPS 13 9350) seems to want to enable C1E
auto-promotion (ugh!), which results in this difference across
suspend/resume according to turbostat:

-cpu3: MSR_IA32_POWER_CTL: 0x0024005d (C1E auto-promotion: DISabled)
+cpu3: MSR_IA32_POWER_CTL: 0x0024005f (C1E auto-promotion: ENabled)

Should intel_idle learn to re-disable idle promotion on resume?

--Andy

^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2016-03-17 19:41 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-03-14  1:39 C1E auto-promotion suspend/resume Andy Lutomirski
2016-03-14  4:31 ` Brown, Len
2016-03-14  4:48   ` [PATCH 0/4] intel_idle: Improve MSR fixup resume handling Andy Lutomirski
2016-03-14  4:48     ` [PATCH 1/4] intel_idle: Consolidate auto-promotion/auto-demotion fixups Andy Lutomirski
2016-03-14  4:48     ` [PATCH 2/4] intel_idle: Remove a broadcast MSR fixup at boot Andy Lutomirski
2016-03-14  4:48     ` [PATCH 3/4] intel_idle: Fix MSRs after resume Andy Lutomirski
2016-03-17 19:41       ` Andy Lutomirski
2016-03-14  4:48     ` [PATCH 4/4] intel_idle: Move BYT/CHT auto-demotion fixup into fix_this_cpu Andy Lutomirski
2016-03-14  5:24   ` C1E auto-promotion suspend/resume Andy Lutomirski

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