linux-kernel - Re: [dm-devel] [PATCH v14 04/11] block: add emulation for copy

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Message-ID: <57558d7b-4444-b709-60bf-5a061cd6c3e9@acm.org>
Date:   Fri, 11 Aug 2023 15:11:05 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Nitesh Shetty <nj.shetty@...sung.com>,
        Jens Axboe <axboe@...nel.dk>, Jonathan Corbet <corbet@....net>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...nel.org>, dm-devel@...hat.com,
        Keith Busch <kbusch@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        Chaitanya Kulkarni <kch@...dia.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>
Cc:     Vincent Fu <vincent.fu@...sung.com>, martin.petersen@...cle.com,
        linux-doc@...r.kernel.org, gost.dev@...sung.com,
        Anuj Gupta <anuj20.g@...sung.com>,
        linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org,
        linux-block@...r.kernel.org, mcgrof@...nel.org, dlemoal@...nel.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [dm-devel] [PATCH v14 04/11] block: add emulation for copy

On 8/11/23 03:52, Nitesh Shetty wrote:
> +	schedule_work(&emulation_io->emulation_work);

schedule_work() uses system_wq. This won't work for all users since 
there are no latency guarantees for system_wq.

Thanks,

Bart.