linux-kernel - Does it make sense to flush ap

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Message-ID: <73927ccf-1582-2e91-051b-b22854df3290@huawei.com>
Date:   Thu, 9 May 2019 23:26:04 +0800
From:   Heyi Guo <guoheyi@...wei.com>
To:     <linux-kernel@...r.kernel.org>
CC:     Marc Zyngier <marc.zyngier@....com>,
        Christoffer Dall <christoffer.dall@....com>,
        wanghaibin 00208455 <wanghaibin.wang@...wei.com>
Subject: Does it make sense to flush ap_list of offlined vcpu?

Hi folks,

When guest OS calls PSCI CPU_OFF, the corresponding VCPU will be put in sleep state. But if there is still IRQ remaining in this VCPU's ap_list, this will block all the following triggers of this IRQ even to other VCPUs. Does it make sense to flush the ap_list of the VCPU when it is requested to be offlined? Or did I miss something?

Thanks,

Heyi