linux-kernel - RE: [PATCH 1/3] Drivers: hv: vmbus: Use the vp_index map even for channels bound to CPU 0

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Message-ID: <BY2PR0301MB071147A5C3973C58873C63DDA0C90@BY2PR0301MB0711.namprd03.prod.outlook.com>
Date:	Fri, 29 May 2015 17:41:34 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
CC:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"olaf@...fle.de" <olaf@...fle.de>,
	"apw@...onical.com" <apw@...onical.com>,
	"vkuznets@...hat.com" <vkuznets@...hat.com>,
	"jasowang@...hat.com" <jasowang@...hat.com>
Subject: RE: [PATCH 1/3] Drivers: hv: vmbus: Use the vp_index map even for
 channels bound to CPU 0



> -----Original Message-----
> From: Dan Carpenter [mailto:dan.carpenter@...cle.com]
> Sent: Friday, May 29, 2015 10:00 AM
> To: KY Srinivasan
> Cc: gregkh@...uxfoundation.org; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org; olaf@...fle.de; apw@...onical.com;
> vkuznets@...hat.com; jasowang@...hat.com
> Subject: Re: [PATCH 1/3] Drivers: hv: vmbus: Use the vp_index map even for
> channels bound to CPU 0
> 
> On Fri, May 29, 2015 at 11:09:02AM -0700, K. Y. Srinivasan wrote:
> > Map target_cpu to target_vcpu using the mapping table.
> >
> 
> It's really hard to tell from this changelog what the user visible
> effects of this patch are.

We should use the map to transform guest CPU ID to VP Index as is done
For the non-performance critical channels. While the value CPU 0 is special and will
map to VP index 0, it is good to be consistent.

Regards,

K. Y
> 
> regards,
> dan carpenter

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