* [PATCH v2 0/2] Move x86_cpu_to_apicid to the __read_mostly section
@ 2012-05-15 15:31 Vlad Zolotarov
0 siblings, 0 replies; only message in thread
From: Vlad Zolotarov @ 2012-05-15 15:31 UTC (permalink / raw)
To: linux-kernel, Thomas Gleixner, Ingo Molnar, H. Peter Anvin, ido,
Shai Fultheim (Shai@ScaleMP.com)
Pls., consider applying this patch series.
It contains the following changes:
- Adds two new macros DEFINE_EARLY_PER_CPU_READ_MOSTLY() and
DECLARE_EARLY_PER_CPU_READ_MOSTLY().
- Adds "read-mostly" qualifier to the following variables in smp.h:
- cpu_sibling_map
- cpu_core_map
- cpu_llc_shared_map
- cpu_llc_id
- cpu_number
- x86_cpu_to_apicid
- x86_bios_cpu_apicid
- x86_cpu_to_logical_apicid
As long as all the variables above are only written during the initialization,
this change is meant to prevent the false sharing and improve the
performance on large multiprocessor systems.
thanks,
vlad
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2012-05-15 15:32 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-05-15 15:31 [PATCH v2 0/2] Move x86_cpu_to_apicid to the __read_mostly section Vlad Zolotarov
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®