linux-kernel - Re: [PATCH -next 4/5] blk-iocost: fix sleeping in atomic context warnning in ioc_qos

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Date:   Mon, 31 Oct 2022 09:33:07 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     Christoph Hellwig <hch@...radead.org>,
        Yu Kuai <yukuai1@...weicloud.com>
Cc:     tj@...nel.org, josef@...icpanda.com, axboe@...nel.dk,
        cgroups@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, yi.zhang@...wei.com,
        "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH -next 4/5] blk-iocost: fix sleeping in atomic context
 warnning in ioc_qos_write()

Hi,

在 2022/10/30 17:55, Christoph Hellwig 写道:
> This seems a little convoluted to me.  I'd suggest to add a new
> sleeping lock that protects the updates, then you just take the
> spinlock after parsing without much other changes.
> 
> (The same comment also applies to patch 5).

Yes, add a new sleeping lock is ok, and changes will be much simpler.

Thanks for the suggestion, I'll send a new verion soon.

Kuai
> .
>