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[Xen-devel] [PATCH 2/2] CPUIDLE: Handle C2 LAPIC timer & TSC stop

  • To: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Wei, Gang" <gang.wei@xxxxxxxxx>
  • Date: Fri, 19 Sep 2008 23:51:26 +0800
  • Accept-language: en-US
  • Acceptlanguage: en-US
  • Delivery-date: Fri, 19 Sep 2008 08:51:57 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Ackab5KrP33CfG1jTsCbpnomiZXkXg==
  • Thread-topic: [PATCH 2/2] CPUIDLE: Handle C2 LAPIC timer & TSC stop

ACPI C2 is quite possible mapped to CPU C3 or deeper state, so thinking from 
worst cases, enable C3 like entry/exit handling for C2 by default. Option 
'lapic_timer_c2_ok' can be used to select simple C2 entry/exit only if the user 
make sure that LAPIC tmr & TSC will not be stopped during C2.

Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx>

Attachment: c2-broadcast.patch
Description: c2-broadcast.patch

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