[PATCH v5] erofs: add per-cpu threads for decompression as an option

Eric Biggers ebiggers at kernel.org
Fri Feb 24 05:29:56 AEDT 2023


On Wed, Feb 08, 2023 at 05:33:22PM +0800, Gao Xiang wrote:
> From: Sandeep Dhavale <dhavale at 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

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