Date:   Thu, 23 Feb 2023 18:29:56 +0000
From:   Eric Biggers <ebiggers@kernel.org>
To:     Gao Xiang <hsiangkao@linux.alibaba.com>
Cc:     linux-erofs@lists.ozlabs.org, Chao Yu <chao@kernel.org>,
        Yue Hu <huyue2@coolpad.com>,
        Jeffle Xu <jefflexu@linux.alibaba.com>,
        Sandeep Dhavale <dhavale@google.com>, kernel-team@android.com,
        LKML <linux-kernel@vger.kernel.org>,
        Nathan Huckleberry <nhuck@google.com>
Subject: Re: [PATCH v5] erofs: add per-cpu threads for decompression as an
 option
Message-ID: <Y/ewpGQkpWvOf7qh@gmail.com>
References: <20230208093322.75816-1-hsiangkao@linux.alibaba.com>
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Hi,

On Wed, Feb 08, 2023 at 05:33:22PM +0800, Gao Xiang wrote:
> From: Sandeep Dhavale <dhavale@google.com>
> 
> Using per-cpu thread pool we can reduce the scheduling latency compared
> to workqueue implementation. With this patch scheduling latency and
> variation is reduced as per-cpu threads are high priority kthread_workers.
> 
> The results were evaluated on arm64 Android devices running 5.10 kernel.

I see that this patch was upstreamed.  Meanwhile, commit c25da5b7baf1d
("dm verity: stop using WQ_UNBOUND for verify_wq") was also upstreamed.

Why is this more complex solution better than simply removing WQ_UNBOUND?

- Eric