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Re: [Xen-devel] [PATCH v5 0/8] qspinlock: a 4-byte queue spinlock with PV support
- To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
- From: Waiman Long <waiman.long@xxxxxx>
- Date: Fri, 28 Feb 2014 11:56:14 -0500
- Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, Marcos Matsunaga <Marcos.Matsunaga@xxxxxxxxxx>, Andi Kleen <andi@xxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Michel Lespinasse <walken@xxxxxxxxxx>, Alok Kataria <akataria@xxxxxxxxxx>, linux-arch@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, Scott J Norton <scott.norton@xxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>, Alexander Fyodorov <halcy@xxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Daniel J Blueman <daniel@xxxxxxxxxxxxx>, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, Oleg Nesterov <oleg@xxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, George Spelvin <linux@xxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Aswin Chandramouleeswaran <aswin@xxxxxx>, Chegu Vinod <chegu_vinod@xxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, David Vrabel <david.vrabel@xxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
- Delivery-date: Fri, 28 Feb 2014 16:56:23 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On 02/26/2014 12:00 PM, Konrad Rzeszutek Wilk wrote:
On Wed, Feb 26, 2014 at 10:14:20AM -0500, Waiman Long wrote:
It should be fairly easy. You just need to implement the kick right?
An IPI should be all that is needed - look in xen_unlock_kick. The
rest of the spinlock code is all generic that is shared between
KVM, Xen and baremetal.
You should be able to run all of this under an HVM guests as well - as
in you don't need a pure PV guest to use the PV ticketlocks.
An easy way to install/run this is to install your latest distro,
do 'yum install xen' or 'apt-get install xen'. Reboot and you
are under Xen. Launch guests, etc with your favorite virtualization
toolstack.
Thank for the tip. I will try that out.
-Longman
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