From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Sander Eikelenboom <linux@eikelenboom.it>
Cc: xen-devel@lists.xensource.com
Subject: Re: Linux v3.12 + pv ticketlocks
Date: Wed, 11 Sep 2013 14:41:29 -0400 [thread overview]
Message-ID: <20130911184129.GA30042@phenom.dumpdata.com> (raw)
In-Reply-To: <1464013377.20130911202501@eikelenboom.it>
On Wed, Sep 11, 2013 at 08:25:01PM +0200, Sander Eikelenboom wrote:
> Hi Konrad,
>
> Just to confirm:
>
> - PV ticketlocks is on by default and doesn't neet a config option, to disable it at boot time it's possible to use "xen_nopvspin" as a kernel commandline parameter
Yes.
> - CONFIG_PARAVIRT_SPINLOCKS should be off, since that would enable the old bytelock pv-spinlock implementation which could now probably be removed ?
You still need CONFIG_PARAVIRT_SPINLOCKS=y to take advantage of it.
The bytelock pvspinlock is gone. If you compile without CONFIG_PARAVIRT_SPINLOCKS
then you will only use ticketlocks for all types of guests and baremtal. No
'PV' variant.
The CONFIG_PARAVIRT_SPINLOCKS=y enables the PV ticketlock for all guests.
>
> Have a nice vacation !
>
> --
> Sander
>
next prev parent reply other threads:[~2013-09-11 18:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-06 20:11 Linux v3.12 + pv ticketlocks Konrad Rzeszutek Wilk
2013-09-09 10:39 ` Ian Campbell
2013-09-09 14:03 ` Konrad Rzeszutek Wilk
2013-09-10 17:41 ` Dario Faggioli
2013-09-11 19:03 ` Konrad Rzeszutek Wilk
2013-09-13 15:17 ` Dario Faggioli
2013-09-13 4:44 ` Jeremy Fitzhardinge
2013-09-11 18:25 ` Sander Eikelenboom
2013-09-11 18:41 ` Konrad Rzeszutek Wilk [this message]
2013-09-11 19:05 ` Sander Eikelenboom
2013-09-11 19:24 ` Konrad Rzeszutek Wilk
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