From: Srikar Dronamraju <srikar@linux•vnet.ibm.com>
To: Waiman Long <longman@redhat•com>
Cc: Nathan Lynch <nathanl@linux•ibm.com>,
Gautham R Shenoy <ego@linux•vnet.ibm.com>,
Phil Auld <pauld@redhat•com>, Juri Lelli <juri.lelli@redhat•com>,
Peter Zijlstra <peterz@infradead•org>,
LKML <linux-kernel@vger•kernel.org>,
Nicholas Piggin <npiggin@gmail•com>,
linuxppc-dev <linuxppc-dev@lists•ozlabs.org>,
Valentin Schneider <valentin.schneider@arm•com>
Subject: Re: [PATCH 0/4] Powerpc: Better preemption for shared processor
Date: Thu, 29 Oct 2020 12:44:20 +0530 [thread overview]
Message-ID: <20201029071420.GA528281@linux.vnet.ibm.com> (raw)
In-Reply-To: <da67d6ce-f120-f61a-19ff-0ae4f1f5dac0@redhat.com>
* Waiman Long <longman@redhat•com> [2020-10-28 20:01:30]:
> > Srikar Dronamraju (4):
> > powerpc: Refactor is_kvm_guest declaration to new header
> > powerpc: Rename is_kvm_guest to check_kvm_guest
> > powerpc: Reintroduce is_kvm_guest
> > powerpc/paravirt: Use is_kvm_guest in vcpu_is_preempted
> >
> > arch/powerpc/include/asm/firmware.h | 6 ------
> > arch/powerpc/include/asm/kvm_guest.h | 25 +++++++++++++++++++++++++
> > arch/powerpc/include/asm/kvm_para.h | 2 +-
> > arch/powerpc/include/asm/paravirt.h | 18 ++++++++++++++++++
> > arch/powerpc/kernel/firmware.c | 5 ++++-
> > arch/powerpc/platforms/pseries/smp.c | 3 ++-
> > 6 files changed, 50 insertions(+), 9 deletions(-)
> > create mode 100644 arch/powerpc/include/asm/kvm_guest.h
> >
> This patch series looks good to me and the performance is nice too.
>
> Acked-by: Waiman Long <longman@redhat•com>
Thank you.
>
> Just curious, is the performance mainly from the use of static_branch
> (patches 1 - 3) or from reducing call to yield_count_of().
Because of the reduced call to yield_count
>
> Cheers,
> Longman
>
--
Thanks and Regards
Srikar Dronamraju
prev parent reply other threads:[~2020-10-29 7:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 12:35 [PATCH 0/4] Powerpc: Better preemption for shared processor Srikar Dronamraju
2020-10-28 12:35 ` [PATCH 1/4] powerpc: Refactor is_kvm_guest declaration to new header Srikar Dronamraju
2020-10-28 12:35 ` [PATCH 2/4] powerpc: Rename is_kvm_guest to check_kvm_guest Srikar Dronamraju
2020-10-28 12:35 ` [PATCH 3/4] powerpc: Reintroduce is_kvm_guest in a new avatar Srikar Dronamraju
2020-10-28 12:35 ` [PATCH 4/4] powerpc/paravirt: Use is_kvm_guest in vcpu_is_preempted Srikar Dronamraju
2020-10-29 0:01 ` [PATCH 0/4] Powerpc: Better preemption for shared processor Waiman Long
2020-10-29 7:14 ` Srikar Dronamraju [this message]
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