xen-devel.lists.xenproject.org archive mirror
 help / color / mirror / Atom feed
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: xen-devel@lists.xenproject.org, david.vrabel@citrix.com,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] xen/x86: Call cpu_startup_entry(CPUHP_AP_ONLINE_IDLE) from xen_play_dead()
Date: Fri, 25 Mar 2016 10:53:58 -0400	[thread overview]
Message-ID: <20160325145358.GC17902@char.us.oracle.com> (raw)
In-Reply-To: <1458219805-13197-3-git-send-email-boris.ostrovsky@oracle.com>

On Thu, Mar 17, 2016 at 09:03:25AM -0400, Boris Ostrovsky wrote:
> This call has always been missing from xen_play dead() but until
> recently this was rather benign. With new cpu hotplug framework
> however this call is required, otherwise a hot-plugged CPU will not

Could you include the commit id of the 'new cpu hotplug' in case
anybody wants to backport this?

Thanks!
> be properly brough up (by never calling cpuhp_online_idle())
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> ---
>  arch/x86/xen/smp.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
> index 3c6d17f..719cf29 100644
> --- a/arch/x86/xen/smp.c
> +++ b/arch/x86/xen/smp.c
> @@ -545,6 +545,8 @@ static void xen_play_dead(void) /* used only with HOTPLUG_CPU */
>  	 * data back is to call:
>  	 */
>  	tick_nohz_idle_enter();
> +
> +	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
>  }
>  
>  #else /* !CONFIG_HOTPLUG_CPU */
> -- 
> 1.7.1
> 

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel

  parent reply	other threads:[~2016-03-25 14:54 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1458219805-13197-1-git-send-email-boris.ostrovsky@oracle.com>
2016-03-17 13:03 ` [PATCH 1/2] xen/apic: Provide Xen-specific version of cpu_present_to_apicid APIC op Boris Ostrovsky
2016-03-17 13:03 ` [PATCH 2/2] xen/x86: Call cpu_startup_entry(CPUHP_AP_ONLINE_IDLE) from xen_play_dead() Boris Ostrovsky
     [not found] ` <1458219805-13197-2-git-send-email-boris.ostrovsky@oracle.com>
2016-03-25 14:52   ` [PATCH 1/2] xen/apic: Provide Xen-specific version of cpu_present_to_apicid APIC op Konrad Rzeszutek Wilk
     [not found] ` <1458219805-13197-3-git-send-email-boris.ostrovsky@oracle.com>
2016-03-25 14:53   ` Konrad Rzeszutek Wilk [this message]
2016-03-25 15:08     ` [PATCH 2/2] xen/x86: Call cpu_startup_entry(CPUHP_AP_ONLINE_IDLE) from xen_play_dead() Boris Ostrovsky
2016-03-25 15:45       ` Konrad Rzeszutek Wilk

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=20160325145358.GC17902@char.us.oracle.com \
    --to=konrad.wilk@oracle.com \
    --cc=boris.ostrovsky@oracle.com \
    --cc=david.vrabel@citrix.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=xen-devel@lists.xenproject.org \
    --subject='Re: [PATCH 2/2] xen/x86: Call cpu_startup_entry(CPUHP_AP_ONLINE_IDLE) from xen_play_dead()' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).