From: Sean Christopherson <seanjc@google.com>
To: Li RongQing <lirongqing@baidu.com>
Cc: x86@kernel.org, kvm@vger.kernel.org, pbonzini@redhat.com
Subject: Re: [PATCH][v2] KVM: VMX: optimize pi_wakeup_handler
Date: Fri, 8 Apr 2022 02:50:25 +0000 [thread overview]
Message-ID: <Yk+i8S1y9s8YGiST@google.com> (raw)
In-Reply-To: <1649244302-6777-1-git-send-email-lirongqing@baidu.com>
On Wed, Apr 06, 2022, Li RongQing wrote:
> pi_wakeup_handler is used to wakeup the sleep vCPUs by posted irq
> list_for_each_entry is used in it, and whose input is other function
> per_cpu(), That cause that per_cpu() be invoked at least twice when
> there is one sleep vCPU
>
> so optimize pi_wakeup_handler it by reading once and same to per CPU
> spinlock
>
> Signed-off-by: Li RongQing <lirongqing@baidu.com>
> ---
Reviewed-by: Sean Christopherson <seanjc@google.com>
next prev parent reply other threads:[~2022-04-08 2:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-06 11:25 [PATCH][v2] KVM: VMX: optimize pi_wakeup_handler Li RongQing
2022-04-08 2:50 ` Sean Christopherson [this message]
2022-05-03 10:05 ` 答复: " Li,Rongqing
2022-05-03 11:54 ` Paolo Bonzini
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