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Re: [Xen-devel] [PATCH] x86: consolidate/enhance TLB flushing interface
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] x86: consolidate/enhance TLB flushing interface |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Tue, 16 Oct 2007 17:38:25 +0100 |
| Delivery-date: | Tue, 16 Oct 2007 09:39:37 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH] x86: consolidate/enhance TLB flushing interface |
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On 21/8/07 16:25, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > Folding into a single local handler and a single SMP multiplexor as > well as adding capability to also flush caches through the same > interfaces (a subsequent patch will make use of this). > > Once at changing cpuinfo_x86, this patch also removes several unused > fields apparently inherited from Linux. Applied at last. I just changed the names of a few functions and added a few comments. Also, I don't know whether you empirically evaluated CLFLUSH versus WBINVD, but your CLFLUSH loop was actually broken because 'sz' was in pages rather than bytes. Hence you did not CLFLUSH a big enough area (by a large margin) and hence you would vastly underestimate the cost of the CLFLUSH approach. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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