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
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=20130911184129.GA30042@phenom.dumpdata.com \
--to=konrad.wilk@oracle.com \
--cc=linux@eikelenboom.it \
--cc=xen-devel@lists.xensource.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;
as well as URLs for NNTP newsgroup(s).