From: Juergen Gross <jgross@suse.com>
To: 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: Wed, 13 Apr 2016 10:49:01 +0200 [thread overview]
Message-ID: <570E07FD.4030403__22800.7020931274$1460537436$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.
>
> 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?
Juergen
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next prev parent reply other threads:[~2016-04-13 8:49 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 ` Juergen Gross [this message]
[not found] ` <570E07FD.4030403@suse.com>
2016-05-17 11:21 ` [PATCH v5 0/6] Support calling functions on dedicated physical cpu 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 ` [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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