linux-kernel - Re: [v2 0/6] KVM: arm64: implement vcpu_is

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Message-ID: <86edujqeif.wl-maz@kernel.org>
Date:   Fri, 04 Nov 2022 09:02:00 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Usama Arif <usama.arif@...edance.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, linux@...linux.org.uk,
        yezengruan@...wei.com, catalin.marinas@....com, will@...nel.org,
        steven.price@....com, mark.rutland@....com, bagasdotme@...il.com,
        fam.zheng@...edance.com, liangma@...ngbit.com,
        punit.agrawal@...edance.com
Subject: Re: [v2 0/6] KVM: arm64: implement vcpu_is_preempted check

On Fri, 04 Nov 2022 06:20:59 +0000,
Usama Arif <usama.arif@...edance.com> wrote:
> 
> This patchset adds support for vcpu_is_preempted in arm64, which allows the guest
> to check if a vcpu was scheduled out, which is useful to know incase it was
> holding a lock. vcpu_is_preempted can be used to improve
> performance in locking (see owner_on_cpu usage in mutex_spin_on_owner,
> mutex_can_spin_on_owner, rtmutex_spin_on_owner and osq_lock) and scheduling
> (see available_idle_cpu which is used in several places in kernel/sched/fair.c
> for e.g. in wake_affine to determine which CPU can run soonest):

Please refrain from reposting a series only two days after the initial
one. One week is a minimum, and only if there is enough review
comments to justify a respin (there were no valuable comments so far).

Reposting more often only results in the review process being
exponentially delayed.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.