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From: Juergen Gross <kernel@pfupf.net>
To: Juergen Gross <jgross@suse.com>,
	linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org
Cc: jeremy@goop.org, jdelvare@suse.com, peterz@infradead.org,
	hpa@zytor.com, akataria@vmware.com, x86@kernel.org,
	rusty@rustcorp.com.au, virtualization@lists.linux-foundation.org,
	chrisw@sous-sol.org, mingo@redhat.com, david.vrabel@citrix.com,
	Douglas_Warzecha@dell.com, pali.rohar@gmail.com,
	boris.ostrovsky@oracle.com, tglx@linutronix.de,
	linux@roeck-us.net
Subject: Re: [PATCH v5 0/6] Support calling functions on dedicated physical cpu
Date: Tue, 17 May 2016 13:21:21 +0200	[thread overview]
Message-ID: <573AFEB1.1060704__33932.1912535981$1463484175$gmane$org@pfupf.net> (raw)
In-Reply-To: <570E07FD.4030403@suse.com>

On 13/04/16 10:49, Juergen Gross wrote:
> On 06/04/16 16:17, Juergen Gross wrote:
>> Some hardware (e.g. Dell Studio laptops) require special functions to
>> be called on physical cpu 0 in order to avoid occasional hangs. When
>> running as dom0 under Xen this could be achieved only via special boot
>> parameters (vcpu pinning) limiting the hypervisor in it's scheduling
>> decisions.
>>
>> This patch series is adding a generic function to be able to temporarily
>> pin a (virtual) cpu to a dedicated physical cpu for executing above
>> mentioned functions on that specific cpu. The drivers (dcdbas and i8k)
>> requiring this functionality are modified accordingly.
>>
>> Changes in V5:
>> - patch 3: rename and reshuffle parameters of smp_call_on_cpu() as requested
>>   by Peter Zijlstra
>> - patch 3: test target cpu to be online as requested by Peter Zijlstra
>> - patch 4: less wordy messages as requested by David Vrabel
>>
>> Changes in V4:
>> - move patches 5 and 6 further up in the series
>> - patch 2 (was 5): WARN_ONCE in case platform doesn't support pinning
>>   as requested by Peter Zijlstra
>> - patch 3 (was 2): change return value in case of illegal cpu as
>>   requested by Peter Zijlstra
>> - patch 3 (was 2): make pinning of vcpu an option as suggested by
>>   Peter Zijlstra
>> - patches 5 and 6 (were 3 and 4): add call to get_online_cpus()
>>
>> Changes in V3:
>> - use get_cpu()/put_cpu() as suggested by David Vrabel
>>
>> Changes in V2:
>> - instead of manipulating the allowed set of cpus use cpu specific
>>   workqueue as requested by Peter Zijlstra
>> - add include/linux/hypervisor.h to hide architecture specific stuff
>>   from generic kernel code
>>
>> Juergen Gross (6):
>>   xen: sync xen header
>>   virt, sched: add generic vcpu pinning support
>>   smp: add function to execute a function synchronously on a cpu
>>   xen: add xen_pin_vcpu() to support calling functions on a dedicated
>>     pcpu
>>   dcdbas: make use of smp_call_on_cpu()
>>   hwmon: use smp_call_on_cpu() for dell-smm i8k
>>
>>  MAINTAINERS                       |   1 +
>>  arch/x86/include/asm/hypervisor.h |   4 ++
>>  arch/x86/kernel/cpu/hypervisor.c  |  11 +++++
>>  arch/x86/xen/enlighten.c          |  40 +++++++++++++++
>>  drivers/firmware/dcdbas.c         |  51 +++++++++----------
>>  drivers/hwmon/dell-smm-hwmon.c    |  35 +++++++------
>>  include/linux/hypervisor.h        |  17 +++++++
>>  include/linux/smp.h               |   3 ++
>>  include/xen/interface/sched.h     | 100 +++++++++++++++++++++++++++++++-------
>>  kernel/smp.c                      |  51 +++++++++++++++++++
>>  kernel/up.c                       |  18 +++++++
>>  11 files changed, 273 insertions(+), 58 deletions(-)
>>  create mode 100644 include/linux/hypervisor.h
>>
> 
> So patches 1, 3 and 4 are acked. Any comments regarding patches 2, 5
> and 6?

Patch 6 gained another Ack. What about 2 and 5?


Juergen

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  parent reply	other threads:[~2016-05-17 11:21 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1459952266-3687-1-git-send-email-jgross@suse.com>
2016-04-06 14:17 ` [PATCH v5 1/6] xen: sync xen header Juergen Gross
2016-04-06 14:17 ` [PATCH v5 2/6] virt, sched: add generic vcpu pinning support Juergen Gross
2016-04-06 14:17 ` [PATCH v5 3/6] smp: add function to execute a function synchronously on a cpu Juergen Gross
2016-04-06 14:17 ` [PATCH v5 4/6] xen: add xen_pin_vcpu() to support calling functions on a dedicated pcpu Juergen Gross
2016-04-06 14:17 ` [PATCH v5 5/6] dcdbas: make use of smp_call_on_cpu() Juergen Gross
2016-04-06 14:17 ` [PATCH v5 6/6] hwmon: use smp_call_on_cpu() for dell-smm i8k Juergen Gross
     [not found] ` <1459952266-3687-4-git-send-email-jgross@suse.com>
2016-04-06 18:04   ` [PATCH v5 3/6] smp: add function to execute a function synchronously on a cpu Peter Zijlstra
2016-04-13  8:49 ` [PATCH v5 0/6] Support calling functions on dedicated physical cpu Juergen Gross
     [not found] ` <570E07FD.4030403@suse.com>
2016-05-17 11:21   ` Juergen Gross [this message]
     [not found] ` <1459952266-3687-7-git-send-email-jgross@suse.com>
2016-06-13 19:05   ` [PATCH v5 6/6] hwmon: use smp_call_on_cpu() for dell-smm i8k Pali Rohár
     [not found] ` <1459952266-3687-3-git-send-email-jgross@suse.com>
2016-06-15 11:18   ` [PATCH v5 2/6] virt, sched: add generic vcpu pinning support Juergen Gross
     [not found] ` <1459952266-3687-6-git-send-email-jgross@suse.com>
2016-06-15 11:19   ` [PATCH v5 5/6] dcdbas: make use of smp_call_on_cpu() Juergen Gross
2016-06-20  8:40 ` [PATCH v5 0/6] Support calling functions on dedicated physical cpu Juergen Gross
2016-06-27 10:34 ` Juergen Gross
2016-04-06 14:17 Juergen Gross

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