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From: Juergen Gross <jgross@suse.com>
To: mingo@redhat.com, peterz@infradead.org
Cc: x86@kernel.org, jeremy@goop.org, jdelvare@suse.com,
	hpa@zytor.com, akataria@vmware.com, linux-kernel@vger.kernel.org,
	rusty@rustcorp.com.au, virtualization@lists.linux-foundation.org,
	chrisw@sous-sol.org, david.vrabel@citrix.com,
	Douglas_Warzecha@dell.com, pali.rohar@gmail.com,
	xen-devel@lists.xenproject.org, 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: Mon, 20 Jun 2016 10:40:15 +0200	[thread overview]
Message-ID: <5767ABEF.9010204__40326.8963135362$1466412097$gmane$org@suse.com> (raw)
In-Reply-To: <1459952266-3687-1-git-send-email-jgross@suse.com>

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.

Peter, Ingo,

is one of you considering to take this series for 4.8? I know not all
patches got an Ack, OTOH maintainers had 2.5 months time to object.

I'd really appreciate this series would make it into 4.8.


Juergen

> 
> 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
> 


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  parent reply	other threads:[~2016-06-20  8:40 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
     [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 ` Juergen Gross [this message]
2016-06-27 10:34 ` [PATCH v5 0/6] Support calling functions on dedicated physical cpu Juergen Gross
2016-04-06 14:17 Juergen Gross

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