From: Keir Fraser <keir.fraser@eu.citrix.com>
To: "Wei, Gang" <gang.wei@intel.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: Re: [PATCH] CPUIDLE: shorten hpet spin_lock holding time
Date: Thu, 22 Apr 2010 09:23:06 +0100 [thread overview]
Message-ID: <C7F5C5FA.1213B%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <C7F5C537.12125%keir.fraser@eu.citrix.com>
On 22/04/2010 09:19, "Keir Fraser" <keir.fraser@eu.citrix.com> wrote:
>> Hm, let me see if I can come up with a patch for this and post it for you.
>
> How about the attached patch? It MWAITs on a completely new flag field,
> avoiding the IPI-avoidance semantics of softirq_pending. It also folds in
> your patch. It also does wakeup-waiting checks on timer_deadline_start, that
> being the field that initiates wakeup via the MONITORed memory region.
...If you do think it looks okay, could you also test it out on relevant
hardware? :-)
Thanks,
Keir
next prev parent reply other threads:[~2010-04-22 8:23 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-20 5:39 [PATCH] CPUIDLE: shorten hpet spin_lock holding time Wei, Gang
2010-04-20 12:49 ` Keir Fraser
2010-04-20 14:04 ` Wei, Gang
2010-04-20 14:21 ` Keir Fraser
2010-04-20 15:20 ` Wei, Gang
2010-04-20 16:05 ` Wei, Gang
2010-04-21 8:09 ` Keir Fraser
2010-04-21 9:06 ` Wei, Gang
2010-04-21 9:25 ` Keir Fraser
2010-04-21 9:36 ` Wei, Gang
2010-04-21 9:52 ` Keir Fraser
2010-04-21 10:03 ` Keir Fraser
2010-04-22 3:59 ` Wei, Gang
2010-04-22 7:22 ` Keir Fraser
2010-04-22 8:19 ` Keir Fraser
2010-04-22 8:23 ` Keir Fraser [this message]
2010-04-29 11:08 ` Wei, Gang
2010-04-22 8:21 ` Keir Fraser
2010-04-29 11:14 ` Wei, Gang
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