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Re: [Xen-devel][PATCH] libxc bitmap utils and vcpu-affinity
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel][PATCH] libxc bitmap utils and vcpu-affinity |
| From: | Dulloor <dulloor@xxxxxxxxx> |
| Date: | Tue, 23 Mar 2010 12:41:04 -0400 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx> |
| Delivery-date: | Tue, 23 Mar 2010 09:44:37 -0700 |
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| References: | <4BA8A1BC0200007800036662@xxxxxxxxxxxxxxxxxx> <C7CE50F7.E2C9%keir.fraser@xxxxxxxxxxxxx> <940bcfd21003230940w7c7d87eas7e1300cfdb633c4c@xxxxxxxxxxxxxx> |
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I meant utils for **xenctl_cpumap** On Tue, Mar 23, 2010 at 12:40 PM, Dulloor <dulloor@xxxxxxxxx> wrote: > Fine, I agree with you both. Attached is a patch adding utils for > xenctl_bitmap (to libxc) and using the same in vcpu_(get|set)affinity. > For the guest-numa interface, I will see if I can use xenctl_cpumap. > > -dulloor > > On Tue, Mar 23, 2010 at 7:05 AM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> > wrote: >> On 23/03/2010 10:10, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote: >> >>>>>> Dulloor <dulloor@xxxxxxxxx> 22.03.10 18:44 >>> >>>> Motivation for using xenctl_cpumask in Xen interfaces : >>>> - xenctl_cpumap is just 4 bytes smaller than static xenctl_cpumask for >>>> 128 cpus (128 would be good for quite some time). However, the new >>> >>> I don't buy this (we're already building for 256 CPUs, looking forward >>> to further bump this in the not too distant future), and I'm generally >>> opposed to introducing hard coded limits in a public interface. >> >> We should use xenctl_cpumask everywhere for specifying physical CPU bitmaps, >> even into guest NUMA interfaces if appropriate. I don't really care if it is >> a bit harder to use than a static bitmap. >> >> -- Keir >> >> >> > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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