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Re: [Xen-devel] virtual frame_table?
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] virtual frame_table? |
| From: | Alex Williamson <alex.williamson@xxxxxx> |
| Date: | Thu, 27 Aug 2009 08:43:41 -0600 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Thu, 27 Aug 2009 07:44:07 -0700 |
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| In-reply-to: | <C6BBE6A8.1321B%keir.fraser@xxxxxxxxxxxxx> |
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On Thu, 2009-08-27 at 07:30 +0100, Keir Fraser wrote: > On 26/08/2009 22:20, "Alex Williamson" <alex.williamson@xxxxxx> wrote: > > > On ia64 we had a virtual frame_table to allow for better handling of > > sparse memory configs. Has x86 considered anything similar? I see that > > init_frametable() is currently allocating 32bytes per page for > > everything up to max_page. This can consume a pretty significant chunk > > of memory if nodes are discontiguous. Anyone motivated to fix it? > > Easily fixed if there's a reason to. Not really many x86 systems have > discontiguous memory. Right, but commodity systems are definitely getting bigger quickly, and it's only a matter of time. I'll toss in my vote that the frame_table should be optimized sooner rather than later. I might even be able to test it on a system that's wasting more memory than we'd like there. Thanks, Alex _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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