Re: [PATCH 09/11] xen/xenbus: use apply_to_page_range directly in xenbus_map_ring_pv

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To: Christoph Hellwig <hch@xxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH 09/11] xen/xenbus: use apply_to_page_range directly in xenbus_map_ring_pv
From: boris.ostrovsky@xxxxxxxxxx
Date: Thu, 24 Sep 2020 19:42:27 -0400
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>, Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>, Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>, Matthew Auld <matthew.auld@xxxxxxxxx>, Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Nitin Gupta <ngupta@xxxxxxxxxx>, x86@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, intel-gfx@xxxxxxxxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx
In-reply-to: <20200924135853.875294-10-hch@lst.de>
Organization: Oracle Corporation
References: <20200924135853.875294-1-hch@lst.de> <20200924135853.875294-10-hch@lst.de>
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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@xxxxxx>


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


-boris

References:
- remove alloc_vm_area v2
  - From: Christoph Hellwig
- [PATCH 09/11] xen/xenbus: use apply_to_page_range directly in xenbus_map_ring_pv
  - From: Christoph Hellwig

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