linux-kernel - Question on io-wq

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Message-ID: <a92e474ab41f4c40866eeb5bd78fe81fBYAPR11MB263250FAD0FBE598982C5E5BFF1D0@BYAPR11MB2632.namprd11.prod.outlook.com>
Date:   Thu, 22 Oct 2020 09:03:12 +0000
From:   "Zhang, Qiang" <Qiang.Zhang@...driver.com>
To:     "axboe@...nel.dk" <axboe@...nel.dk>
CC:     "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
        "io-uring@...r.kernel.org" <io-uring@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-fsdevel@...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