Re: [Xen-devel] [PATCH 1/3] x86/xen: allow for privcmd hypercalls to be preempted

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2014-02-11 at 19:19 +0000, David Vrabel wrote:
> Implement is_premptible_hypercall() by adding a second hypercall page
> (preemptible_hypercall_page, copied from hypercall_page).  Calls made
> via the new page may be preempted.

Wouldn't a per-cpu flag variable set for the duration of privcmd_call do
the job just as well without requiring per-arch knowledge?

Ian.


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