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Re: [Xen-devel] [PATCH] x86: fix preemptable page typehandling(v2)
| To: | Jan Beulich <jbeulich@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] x86: fix preemptable page typehandling(v2) |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Thu, 30 Oct 2008 17:27:05 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 30 Oct 2008 10:27:18 -0700 |
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| In-reply-to: | <4909F703.76E4.0078.0@xxxxxxxxxx> |
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| Thread-topic: | [Xen-devel] [PATCH] x86: fix preemptable page typehandling(v2) |
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On 30/10/08 17:03, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: >> This would be basically a small cmpxchg() loop. Since it's only executed >> before setting PGT_partial we know that only one such special reference is >> needed per page and we could just make get_page() leave headroom of one >> reference. >> >> Simpler code and faster code? > > Yes - admittedly I had expected you to dislike a special casing approach like > this... I think it will overall make the code clearer. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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