linux-kernel - Re: [RESEND PATCH v3 kernel 3/7] mm: add a function to get the max pfn

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Message-ID: <580E3C76.3010205@intel.com>
Date:   Mon, 24 Oct 2016 09:53:10 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Liang Li <liang.z.li@...el.com>, mst@...hat.com
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, linux-mm@...ck.org,
        kvm@...r.kernel.org, qemu-devel@...gnu.org, quintela@...hat.com,
        dgilbert@...hat.com, pbonzini@...hat.com, cornelia.huck@...ibm.com,
        amit.shah@...hat.com, Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>
Subject: Re: [RESEND PATCH v3 kernel 3/7] mm: add a function to get the max
 pfn

On 10/20/2016 11:24 PM, Liang Li wrote:
> Expose the function to get the max pfn, so it can be used in the
> virtio-balloon device driver. Simply include the 'linux/bootmem.h'
> is not enough, if the device driver is built to a module, directly
> refer the max_pfn lead to build failed.

I'm not sure the rest of the set is worth reviewing.  I think a lot of
it will change pretty fundamentally once you have those improved data
structures in place.