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Re: [Xen-devel] [PATCH] use per-cpu variables in cpufreq
| To: | Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] use per-cpu variables in cpufreq |
| From: | Keir Fraser <keir@xxxxxxx> |
| Date: | Fri, 27 May 2011 14:11:51 +0100 |
| Cc: | |
| Delivery-date: | Fri, 27 May 2011 06:14:00 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH] use per-cpu variables in cpufreq |
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On 27/05/2011 12:11, "Juergen Gross" <juergen.gross@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx > > > 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@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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