linux-kernel - Question on io-wq

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Message-ID: <98c41fba-87fe-b08d-2c8c-da404f91ef31@windriver.com>
Date:   Thu, 22 Oct 2020 17:02:06 +0800
From:   "Zhang,Qiang" <qiang.zhang@...driver.com>
To:     axboe@...nel.dk
Cc:     viro@...iv.linux.org.uk, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Question on io-wq

Hi Jens Axboe

There are some problem in 'io_wqe_worker' thread, when the 
'io_wqe_worker' be create and  Setting the affinity of CPUs in NUMA 
nodes, due to CPU hotplug, When the last CPU going down, the 
'io_wqe_worker' thread will run anywhere. when the CPU in the node goes 
online again, we should restore their cpu bindings?

Thanks
Qiang