netdev - Re: [RFC 01/11] Drivers: hv: vmbus: Always use HV_HYP_PAGE

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Message-ID: <20200722232035.GB35358@debian-boqun.qqnc3lrjykvubdpftowmye0fmh.lx.internal.cloudapp.net>
Date:   Thu, 23 Jul 2020 07:20:35 +0800
From:   Boqun Feng <boqun.feng@...il.com>
To:     Wei Liu <wei.liu@...nel.org>
Cc:     linux-hyperv@...r.kernel.org, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-scsi@...r.kernel.org, "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Michael Kelley <mikelley@...rosoft.com>
Subject: Re: [RFC 01/11] Drivers: hv: vmbus: Always use HV_HYP_PAGE_SIZE for
 gpadl

On Tue, Jul 21, 2020 at 03:22:18PM +0000, Wei Liu wrote:
> On Tue, Jul 21, 2020 at 09:41:25AM +0800, Boqun Feng wrote:
> > Since the hypervisor always uses 4K as its page size, the size of PFNs
> > used for gpadl should be HV_HYP_PAGE_SIZE rather than PAGE_SIZE, so
> > adjust this accordingly as the preparation for supporting 16K/64K page
> > size guests.
> 
> It may be worth calling out there is no change on x86 because
> HV_HYP_PAGE_SHIFT and PAGE_SHIFT are of the same value there.
> 

Sure, I will call it out in the commit log of the next version, thanks!

Regards,
Boqun

> Wei.