linux-kernel - Re: [PATCH 09/11] xen/xenbus: use apply_to_page_range directly in xenbus_map_ring

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Message-ID: <ab2913a6-c5ac-c067-6e55-e2549b286f36@oracle.com>
Date:   Thu, 24 Sep 2020 19:42:27 -0400
From:   boris.ostrovsky@...cle.com
To:     Christoph Hellwig <hch@....de>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        Matthew Auld <matthew.auld@...el.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Minchan Kim <minchan@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Nitin Gupta <ngupta@...are.org>, x86@...nel.org,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 09/11] xen/xenbus: use apply_to_page_range directly in
 xenbus_map_ring_pv


On 9/24/20 9:58 AM, Christoph Hellwig wrote:
> Replacing alloc_vm_area with get_vm_area_caller + apply_page_range
> allows to fill put the phys_addr values directly instead of doing
> another loop over all addresses.
>
> Signed-off-by: Christoph Hellwig <hch@....de>


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>


-boris