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Re: [Xen-devel] [PATCH v3 3/7] sysctl: Make topologyinfo and numainfo sysctls a little more efficient

On 02/16/2015 09:08 AM, Dario Faggioli wrote:
On Mon, 2015-02-09 at 15:04 -0500, Boris Ostrovsky wrote:
Currently both of these sysctls make a copy to userspace for each index of
various query arrays. We should try to copy whole arrays instead.

This requires some changes in sysctl's public data structure, thus bump
interface version.

Report topology for all present (not just online) cpus.

Rename xen_sysctl_topologyinfo and XEN_SYSCTL_topologyinfo to reflect the fact
that these are used for CPU topology. Subsequent patch will add support for
PCI topology sysctl.

Clarify some somments in sysctl.h.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

AFAIUI, this patch will change, so I'll look at it again in next
version. What I've seen here seemed all good to me.

Jan and Andrew don't want to make changes that I describe in the first paragraph so that will probably be different in the next version.


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