RE: [PATCH 3/4] x86/hyper-v: use cheaper HVCALL_SEND_IPI hypercall when possible

Michael Kelley (EOSG)
2018-06-26T00:03:54Z

> -----Original Message-----
> From: Vitaly Kuznetsov <vkuznets@redhat.com>
> Sent: Friday, June 22, 2018 10:06 AM
> To: x86@kernel.org
> Cc: devel@linuxdriverproject.org; linux-kernel@vger.kernel.org; KY Srinivasan
> <kys@microsoft.com>; Haiyang Zhang <haiyangz@microsoft.com>; Stephen Hemminger
> <sthemmin@microsoft.com>; Thomas Gleixner <tglx@linutronix.de>; Ingo Molnar
> <mingo@redhat.com>; H. Peter Anvin <hpa@zytor.com>; Tianyu Lan
> <Tianyu.Lan@microsoft.com>; Michael Kelley (EOSG) <Michael.H.Kelley@microsoft.com>
> Subject: [PATCH 3/4] x86/hyper-v: use cheaper HVCALL_SEND_IPI hypercall when possible
>
> When there is no need to send an IPI to a CPU with VP number > 64
> we can do the job with fast HVCALL_SEND_IPI hypercall.
>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>

Reviewed-by: Michael Kelley <mikelley@microsoft.com>