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Re: [Xen-devel] [PATCH 1/2, v2] x86: replace nr_irqs sized per-domain ar
| To: | Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH 1/2, v2] x86: replace nr_irqs sized per-domain arrays with radix trees |
| From: | Keir Fraser <keir.xen@xxxxxxxxx> |
| Date: | Wed, 04 May 2011 21:37:52 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx, Allen M Kay <allen.m.kay@xxxxxxxxx> |
| Delivery-date: | Wed, 04 May 2011 13:38:51 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH 1/2, v2] x86: replace nr_irqs sized per-domain arrays with radix trees |
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On 04/05/2011 20:55, "Keir Fraser" <keir.xen@xxxxxxxxx> wrote: >> Ideally, the Xen radix-tree.c would support both needs through some >> kind of layering, but if your preference is to go to the upstream >> Linux radix-tree.c, I can probably leverage my inlined-radix-tree >> code into Xen tmem.c. I don't expect it will be trivial though. > > I'm sure I can pull in upstream radix-tree.c and get Xen's tmem ported onto > it. As for performance, I may leave the tagging stuff out as we won't need > it. Then it's just quibbling over RCU overheads, which I would bet are > manageable. We can modify radix-tree.c further if there is good reason for > it. Looking at 2.6.38's radix-tree implementation, I'll be stripping it down heavily as I pull it in. It will likely be acceptable enough for tmem as is after that, else after only minor further changes. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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