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Re: [Xen-devel] Fwd: Re: struct page field arrangement
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Fwd: Re: struct page field arrangement |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Fri, 16 Mar 2007 12:37:44 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 16 Mar 2007 05:36:59 -0700 |
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| Thread-topic: | [Xen-devel] Fwd: Re: struct page field arrangement |
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On 16/3/07 11:58, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > Of course we could back out that changeset, but one of the reasons for > submitting it was to get closer to native. None of the fixes sound straightforward. :-) I'd suggest we back out the mm/Kconfig change for 3.0.5 (since that is close, and I'm not super confident that we'd get any of your proposed fixes correct first time) and then have a go at supporting split-ptlock in 3.0.6 timeframe. The situation after all is that our scalability beyond 4 VCPUs is currently almost certainly bottlenecked by conservative locking in Xen rather than by per-mm locking in Linux. So we're looking at complicating the Linux code close to a Xen release for no actual user benefit. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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