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By itself this is just code-tidying, but it's also useful for the
following patch, which will adjust __section() for clang compiles.
Signed-off-by: Tim Deegan <tim@xen.org>
Acked-by: Keir Fraser <keir@xen.org>
Committed-by: Tim Deegan <tim@xen.org>
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Besides the .text space savings of over 2.5k on x86-64 (1.5k for
x86-32) this removes a load (plus a lea on x86-64) from various
frequently executed code paths, and finally provides a reason (other
than legibility) to prefer this_cpu() over per_cpu() in all places
where smp_processor_id() isn't being called anyway.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
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At the same time, the data area starts life zeroed.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Per-cpu vector code add a lot of percpu data. Together with perfc
enabled, one page per cpu is not enough any more.
Signed-off-by: Yang Xiaowei <xiaowei.yang@intel.com>
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Since mixing data that only gets setup once and then (perhaps
frequently) gets read by remote CPUs with data that the local CPU may
modify (again, perhaps frequently) still causes undesirable cache
protocol related bus traffic, separate the former class of objects
from the latter.
These objects converted here are just picked based on their write-once
(or write-very-rarely) properties; perhaps some more adjustments may
be desirable subsequently. The primary users of the new sub-section
will result from the next patch.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
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directly a per-cpu object.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
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x86 and used it to eliminate the percpu_ctxt struct from
arch/x86/domain.c.
Signed-off-by: Keir Fraser <keir@xensource.com>
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