linux-kernel - RE: [PATCH v2 1/4] nitro_enclaves: merge contiguous physical memory regions

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Date:   Wed, 22 Sep 2021 00:27:44 +0000
From:   "Longpeng (Mike, Cloud Infrastructure Service Product Dept.)" 
        <longpeng2@...wei.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "andraprs@...zon.com" <andraprs@...zon.com>,
        "lexnv@...zon.com" <lexnv@...zon.com>,
        "alcioa@...zon.com" <alcioa@...zon.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Gonglei (Arei)" <arei.gonglei@...wei.com>,
        "kamal@...onical.com" <kamal@...onical.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "sgarzare@...hat.com" <sgarzare@...hat.com>,
        "stefanha@...hat.com" <stefanha@...hat.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "ne-devel-upstream@...zon.com" <ne-devel-upstream@...zon.com>
Subject: RE: [PATCH v2 1/4] nitro_enclaves: merge contiguous physical memory
 regions



> -----Original Message-----
> From: Greg KH [mailto:gregkh@...uxfoundation.org]
> Sent: Tuesday, September 21, 2021 11:21 PM
> To: Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
> <longpeng2@...wei.com>
> Cc: andraprs@...zon.com; lexnv@...zon.com; alcioa@...zon.com;
> linux-kernel@...r.kernel.org; Gonglei (Arei) <arei.gonglei@...wei.com>;
> kamal@...onical.com; pbonzini@...hat.com; sgarzare@...hat.com;
> stefanha@...hat.com; vkuznets@...hat.com; ne-devel-upstream@...zon.com
> Subject: Re: [PATCH v2 1/4] nitro_enclaves: merge contiguous physical memory
> regions
> 
> On Tue, Sep 21, 2021 at 11:10:36PM +0800, Longpeng(Mike) wrote:
> > There can be cases when there are more memory regions that need to be
> > set for an enclave than the maximum supported number of memory regions
> > per enclave. One example can be when the memory regions are backed by 2
> > MiB hugepages (the minimum supported hugepage size).
> >
> > Let's merge the adjacent regions if they are physical contiguous. This
> > way the final number of memory regions is less than before merging and
> > could potentially avoid reaching maximum.
> >
> > Signed-off-by: Longpeng(Mike) <longpeng2@...wei.com>
> > ---
> >  drivers/virt/nitro_enclaves/ne_misc_dev.c | 87
> ++++++++++++++++++++-----------
> >  1 file changed, 58 insertions(+), 29 deletions(-)
> >
> 
> What changed from v1?

It seems you missed the cover letter ?