From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Scott Wood <scottwood@freescale.com>
Cc: linux-rt-users@vger.kernel.org, Alexander Graf <agraf@suse.de>,
linux-kernel@vger.kernel.org,
Bogdan Purcareata <bogdan.purcareata@freescale.com>,
mihai.caraman@freescale.com, Paolo Bonzini <pbonzini@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 0/2] powerpc/kvm: Enable running guests on RT Linux
Date: Wed, 25 Feb 2015 17:36:49 +0100 [thread overview]
Message-ID: <20150225163649.GD6823@linutronix.de> (raw)
In-Reply-To: <1424734051.4698.17.camel@freescale.com>
* Scott Wood | 2015-02-23 17:27:31 [-0600]:
>This isn't a host PIC driver. It's guest PIC emulation, some of which
>is indeed not suitable for a rawlock (in particular, openpic_update_irq
>which loops on the number of vcpus, with a loop body that calls
>IRQ_check() which loops over all pending IRQs). The vcpu limits are a
>temporary bandaid to avoid the worst latencies, but I'm still skeptical
>about this being upstream material.
Okay.
>-Scott
Sebastian
WARNING: multiple messages have this Message-ID (diff)
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Scott Wood <scottwood@freescale.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Alexander Graf <agraf@suse.de>,
Bogdan Purcareata <bogdan.purcareata@freescale.com>,
linuxppc-dev@lists.ozlabs.org, linux-rt-users@vger.kernel.org,
linux-kernel@vger.kernel.org, mihai.caraman@freescale.com,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 0/2] powerpc/kvm: Enable running guests on RT Linux
Date: Wed, 25 Feb 2015 17:36:49 +0100 [thread overview]
Message-ID: <20150225163649.GD6823@linutronix.de> (raw)
In-Reply-To: <1424734051.4698.17.camel@freescale.com>
* Scott Wood | 2015-02-23 17:27:31 [-0600]:
>This isn't a host PIC driver. It's guest PIC emulation, some of which
>is indeed not suitable for a rawlock (in particular, openpic_update_irq
>which loops on the number of vcpus, with a loop body that calls
>IRQ_check() which loops over all pending IRQs). The vcpu limits are a
>temporary bandaid to avoid the worst latencies, but I'm still skeptical
>about this being upstream material.
Okay.
>-Scott
Sebastian
next prev parent reply other threads:[~2015-02-25 16:36 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-18 9:32 [PATCH 0/2] powerpc/kvm: Enable running guests on RT Linux Bogdan Purcareata
2015-02-18 9:32 ` Bogdan Purcareata
2015-02-18 9:32 ` [PATCH 1/2] powerpc/kvm: Convert openpic lock to raw_spinlock Bogdan Purcareata
2015-02-18 9:32 ` Bogdan Purcareata
2015-02-23 22:43 ` Scott Wood
2015-02-23 22:43 ` Scott Wood
2015-02-18 9:32 ` [PATCH 2/2] powerpc/kvm: Limit MAX_VCPUS for guests running on RT Linux Bogdan Purcareata
2015-02-18 9:32 ` Bogdan Purcareata
2015-02-18 9:36 ` Sebastian Andrzej Siewior
2015-02-18 9:36 ` Sebastian Andrzej Siewior
2015-02-20 13:45 ` Alexander Graf
2015-02-20 13:45 ` Alexander Graf
2015-02-23 22:48 ` Scott Wood
2015-02-23 22:48 ` Scott Wood
2015-02-20 13:45 ` [PATCH 0/2] powerpc/kvm: Enable running guests " Alexander Graf
2015-02-20 13:45 ` Alexander Graf
2015-02-20 14:12 ` Paolo Bonzini
2015-02-20 14:12 ` Paolo Bonzini
2015-02-20 14:16 ` Alexander Graf
2015-02-20 14:16 ` Alexander Graf
2015-02-20 14:54 ` Sebastian Andrzej Siewior
2015-02-20 14:54 ` Sebastian Andrzej Siewior
2015-02-20 14:57 ` Paolo Bonzini
2015-02-20 14:57 ` Paolo Bonzini
2015-02-20 15:06 ` Sebastian Andrzej Siewior
2015-02-20 15:06 ` Sebastian Andrzej Siewior
2015-02-20 15:10 ` Paolo Bonzini
2015-02-20 15:10 ` Paolo Bonzini
2015-02-20 15:17 ` Sebastian Andrzej Siewior
2015-02-20 15:17 ` Sebastian Andrzej Siewior
2015-02-23 8:12 ` Purcareata Bogdan
2015-02-23 8:12 ` Purcareata Bogdan
2015-02-23 7:50 ` Purcareata Bogdan
2015-02-23 7:50 ` Purcareata Bogdan
2015-02-23 7:29 ` Purcareata Bogdan
2015-02-23 7:29 ` Purcareata Bogdan
2015-02-23 23:27 ` Scott Wood
2015-02-23 23:27 ` Scott Wood
2015-02-23 23:27 ` Scott Wood
2015-02-25 16:36 ` Sebastian Andrzej Siewior [this message]
2015-02-25 16:36 ` Sebastian Andrzej Siewior
2015-02-26 13:02 ` Paolo Bonzini
2015-02-26 13:02 ` Paolo Bonzini
2015-02-26 13:31 ` Sebastian Andrzej Siewior
2015-02-26 13:31 ` Sebastian Andrzej Siewior
2015-02-27 1:05 ` Scott Wood
2015-02-27 1:05 ` Scott Wood
2015-02-27 13:06 ` Paolo Bonzini
2015-02-27 13:06 ` Paolo Bonzini
2015-03-27 17:07 ` Purcareata Bogdan
2015-03-27 17:07 ` Purcareata Bogdan
2015-04-02 23:11 ` Scott Wood
2015-04-02 23:11 ` Scott Wood
2015-04-03 8:07 ` Purcareata Bogdan
2015-04-03 8:07 ` Purcareata Bogdan
2015-04-03 21:26 ` Scott Wood
2015-04-03 21:26 ` Scott Wood
2015-04-09 7:44 ` Purcareata Bogdan
2015-04-09 7:44 ` Purcareata Bogdan
2015-04-09 7:44 ` Purcareata Bogdan
2015-04-09 23:53 ` Scott Wood
2015-04-09 23:53 ` Scott Wood
2015-04-20 10:53 ` Purcareata Bogdan
2015-04-20 10:53 ` Purcareata Bogdan
2015-04-21 0:52 ` Scott Wood
2015-04-21 0:52 ` Scott Wood
2015-04-22 12:06 ` Purcareata Bogdan
2015-04-22 12:06 ` Purcareata Bogdan
2015-04-22 12:06 ` Purcareata Bogdan
2015-04-23 0:30 ` Scott Wood
2015-04-23 0:30 ` Scott Wood
2015-04-23 12:31 ` Purcareata Bogdan
2015-04-23 12:31 ` Purcareata Bogdan
2015-04-23 12:31 ` Purcareata Bogdan
2015-04-23 21:26 ` Scott Wood
2015-04-23 21:26 ` Scott Wood
2015-04-27 6:45 ` Purcareata Bogdan
2015-04-27 6:45 ` Purcareata Bogdan
2015-04-27 6:45 ` Purcareata Bogdan
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