linux-kernel - RE: [PATCH V3 2/4] misc: vop: do not allocate and reassign the used ring

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Message-ID: <VI1PR04MB4960C0E76374B2775D99A82192160@VI1PR04MB4960.eurprd04.prod.outlook.com>
Date:   Tue, 27 Oct 2020 07:05:43 +0000
From:   Sherry Sun <sherry.sun@....com>
To:     "sudeep.dutt@...el.com" <sudeep.dutt@...el.com>,
        "ashutosh.dixit@...el.com" <ashutosh.dixit@...el.com>,
        "vincent.whitchurch@...s.com" <vincent.whitchurch@...s.com>
CC:     Christoph Hellwig <hch@...radead.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "arnd@...db.de" <arnd@...db.de>, "kishon@...com" <kishon@...com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V3 2/4] misc: vop: do not allocate and reassign the used
 ring

Hi Sudeep & Ashutosh & Vincent,

Can you help test the patch about removing the codes of reassign used ring, and comment on the impact for Intel MIC platform?
Thanks for any help.

Best regards
Sherry

> Subject: Re: [PATCH V3 2/4] misc: vop: do not allocate and reassign the used
> ring
> 
> On Mon, Oct 26, 2020 at 03:04:45AM +0000, Sherry Sun wrote:
> > Hi Greg & Christoph,
> >
> > > Subject: Re: [PATCH V3 2/4] misc: vop: do not allocate and reassign
> > > the used ring
> > >
> > > On Thu, Oct 22, 2020 at 01:06:36PM +0800, Sherry Sun wrote:
> > > > We don't need to allocate and reassign the used ring here and
> > > > remove the used_address_updated flag.Since RC has allocated the
> > > > entire vring, including the used ring. Simply add the
> > > > corresponding offset can get the used ring address.
> > >
> > > Someone needs to verify this vs the existing intel implementations.
> >
> > Hi Greg, @gregkh@...uxfoundation.org, sorry I don't have the Intel MIC
> devices so cannot test it, do you know anyone who can help test this patch
> changes on the Intel MIC platform? Thanks.
> 
> Why not ask the authors/maintainers of that code?
> 
> greg k-h