mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Thomas Gleixner <tglx@linutronix.de>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com, hpa@zytor.com,
	mingo@elte.hu, linux-tip-commits@vger.kernel.org
Subject: Re: [tip:irq/core] x86: Sanitize apb timer interrupt handling
Date: Tue, 12 Oct 2010 23:28:19 +0200 (CEST)	[thread overview]
Message-ID: <alpine.LFD.2.00.1010122327260.2909@localhost6.localdomain6> (raw)
In-Reply-To: <20101012142000.00001358@unknown>

On Tue, 12 Oct 2010, Jacob Pan wrote:

> 
> >x86: Sanitize apb timer interrupt handling
> >
> >Disable the interrupt in CPU_DEAD where it belongs.
> My main concern is the performance cost. The power management code for
> Moorestown system make use of the cpu hotplug code (disable_nonboot_cpus)
> but much more frequently. The system low power states are call S0 idle
> state (s0ix).
> 
> Leaving the irq enabled at the chip and desc level between S0ix states
> might give some performance benefit. That was my original thought.
> Will it cause problems?

Errm. I merily moved it to the place where it should be. You do the
disable/enable dance already today.

Thanks,

	tglx

  reply	other threads:[~2010-10-12 21:28 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <tip-a5ef2e70405c8a9ee380b5ff33a008c75454791f@git.kernel.org>
2010-10-12 21:20 ` Jacob Pan
2010-10-12 21:28   ` Thomas Gleixner [this message]
2010-10-12 22:12     ` Jacob Pan
2010-10-12 22:26       ` Thomas Gleixner
2010-10-12 22:44         ` Jacob Pan
2010-10-13 18:10         ` Jacob Pan

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.LFD.2.00.1010122327260.2909@localhost6.localdomain6 \
    --to=tglx@linutronix.de \
    --cc=hpa@zytor.com \
    --cc=jacob.jun.pan@linux.intel.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-tip-commits@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=mingo@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®