From: venkatesh.pallipadi@intel.com
To: mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com
Cc: linux-kernel@vger.kernel.org, lenb@kernel.org,
shaohua.li@intel.com, svaidy@linux.vnet.ibm.com,
a.p.zijlstra@chello.nl,
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Subject: [patch 0/2] x86: Make offline cpus to go to deepest idle state using mwait
Date: Fri, 22 May 2009 16:19:40 -0700 [thread overview]
Message-ID: <20090522231940.553094000@intel.com> (raw)
cpu hotplug has this long standing bug, with offline cpus going into
hlt loop. That can result in offline CPU burning more power than while it is
in online state (as when online it can potentially go to deeper C-state).
Fix the bug using native mwait to enter deepest C-state in play_dead.
--
next reply other threads:[~2009-05-22 23:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-22 23:19 venkatesh.pallipadi [this message]
2009-05-22 23:19 ` [patch 1/2] x86: Add pm_play_dead funcptr to power-efficiently offline CPUs venkatesh.pallipadi
2009-05-23 10:44 ` Peter Zijlstra
2009-05-23 15:07 ` Pallipadi, Venkatesh
2009-06-22 17:25 ` Pallipadi, Venkatesh
2009-05-22 23:19 ` [patch 2/2] x86: put offline CPUs into deepest mwait cstate_subcstate venkatesh.pallipadi
2009-05-25 0:56 ` Shaohua Li
2009-05-26 21:17 ` Pallipadi, Venkatesh
2010-09-17 23:46 ` [tip:x86/idle] x86, hotplug: Use mwait to offline a processor, fix the legacy case tip-bot for H. Peter Anvin
2010-09-18 0:13 ` [tip:x86/idle] x86, hotplug: Move WBINVD back outside the play_dead loop tip-bot for H. Peter Anvin
2010-09-18 0:48 ` Venkatesh Pallipadi
2010-09-20 18:20 ` H. Peter Anvin
2010-09-20 20:11 ` H. Peter Anvin
2010-09-20 22:34 ` Venkatesh Pallipadi
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