Re: [PATCH V2 2/2] block: move 'q_usage_counter' into front of 'request_queue'

[PATCH V2 0/2] percpu_ref & block: reduce memory footprint of percpu_ref in fast path · Ming Lei <hidden> · 2020-09-02
[PATCH V2 1/2] percpu_ref: reduce memory footprint of percpu_ref in fast path · Ming Lei <hidden> · 2020-09-02
Re: [PATCH V2 1/2] percpu_ref: reduce memory footprint of percpu_ref in fast path · Christoph Hellwig <hch@lst.de> · 2020-09-02
[PATCH V2 2/2] block: move 'q_usage_counter' into front of 'request_queue' · Ming Lei <hidden> · 2020-09-02
Re: [PATCH V2 2/2] block: move 'q_usage_counter' into front of 'request_queue' · Christoph Hellwig <hch@lst.de> · 2020-09-02
Re: [PATCH V2 0/2] percpu_ref & block: reduce memory footprint of percpu_ref in fast path · Jens Axboe <axboe@kernel.dk> · 2020-09-02

From: Christoph Hellwig <hch@lst.de>
Date: 2020-09-02 15:41:28
Also in: lkml

On Wed, Sep 02, 2020 at 08:26:43PM +0800, Ming Lei wrote:

The field of 'q_usage_counter' is always fetched in fast path of every
block driver, and move it into front of 'request_queue', so it can be
fetched into 1st cacheline of 'request_queue' instance.

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>

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