From: Keir Fraser <keir@xen.org>
To: Juergen Gross <juergen.gross@ts.fujitsu.com>,
xen-devel@lists.xensource.com
Subject: Re: [PATCH] use per-cpu variables in cpufreq
Date: Fri, 27 May 2011 14:11:51 +0100 [thread overview]
Message-ID: <CA0561A7.2DB3E%keir@xen.org> (raw)
In-Reply-To: <eb601128d89304960076.1306494680@nehalem1>
On 27/05/2011 12:11, "Juergen Gross" <juergen.gross@ts.fujitsu.com> wrote:
> The cpufreq driver used some local arrays indexed by cpu number. This patch
> replaces those arrays by per-cpu variables. The AMD and INTEL specific parts
> used different per-cpu data structures with nearly identical semantics.
> Fold the two structures into one by adding a generic architecture data item.
Xen's per-cpu data gets freed across cpu offline/online, whereas cpu-indexed
arrays of course do not. Will the cpufreq state be correctly handled across
offline/online if we switch to per-cpu vars?
-- Keir
> Signed-off-by: juergen.gross@ts.fujitsu.com
>
>
> 8 files changed, 58 insertions(+), 66 deletions(-)
> xen/arch/x86/acpi/cpufreq/cpufreq.c | 36 ++++++++++++------------
> xen/arch/x86/acpi/cpufreq/powernow.c | 43 +++++++++++------------------
> xen/drivers/acpi/pmstat.c | 6 ++--
> xen/drivers/cpufreq/cpufreq.c | 24 ++++++++--------
> xen/drivers/cpufreq/cpufreq_ondemand.c | 2 -
> xen/drivers/cpufreq/utility.c | 8 ++---
> xen/include/acpi/cpufreq/cpufreq.h | 3 +-
> xen/include/acpi/cpufreq/processor_perf.h | 2 -
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
next prev parent reply other threads:[~2011-05-27 13:11 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-27 11:11 [PATCH] use per-cpu variables in cpufreq Juergen Gross
2011-05-27 13:11 ` Keir Fraser [this message]
2011-05-27 13:29 ` Juergen Gross
2011-05-28 7:52 ` Keir Fraser
2011-05-30 5:47 ` Juergen Gross
2011-05-30 9:45 ` Keir Fraser
2011-05-31 1:51 ` Tian, Kevin
2011-05-31 7:31 ` Keir Fraser
2011-05-31 7:37 ` Liu, Jinsong
2011-05-30 8:06 ` Tian, Kevin
2011-05-30 15:33 ` Liu, Jinsong
2011-06-10 19:00 ` Langsdorf, Mark
2011-06-14 9:04 ` Juergen Gross
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