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Re: [Xen-devel] [PATCH v3 3/3] tools: introduce parameter max_wp_ram_ranges.
- To: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
- From: Ian Campbell <ian.campbell@xxxxxxxxxx>
- Date: Thu, 4 Feb 2016 10:06:25 +0000
- Cc: Kevin Tian <kevin.tian@xxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>, Paul Durrant <Paul.Durrant@xxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxx>, "zhiyuan.lv@xxxxxxxxx" <zhiyuan.lv@xxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Zhang Yu <yu.c.zhang@xxxxxxxxxxxxxxx>, "Keir \(Xen.org\)" <keir@xxxxxxx>
- Delivery-date: Thu, 04 Feb 2016 10:06:38 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On Wed, 2016-02-03 at 17:41 +0000, George Dunlap wrote:
> But of course, since they they aren't actually ranges but just gpfns,
> they're scattered randomly throughout the guest physical address
> space.
(Possibly) stupid question:
Since, AIUI, the in-guest GPU driver is XenGT aware could it not allocate a
contiguous range of pages at start of day to use as GPU PTs? Or even just N
contiguous regions, e.g. i think the "8K" refers to pages, which is 16 2M
allocations, which is a far more manageable number of ranges to track than
8096 individual pages.
Ian.
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