From: Christoph Hellwig <hch@infradead.org>
To: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, Yu Kuai <yukuai3@huawei.com>
Subject: Re: [PATCH 6/6] blk-mq: manage hctx map via xarray
Date: Wed, 2 Mar 2022 01:59:49 -0800 [thread overview]
Message-ID: <Yh9AFYuvK7ZGH/uP@infradead.org> (raw)
In-Reply-To: <Yh8+qA4p6EWGFbtG@T590>
On Wed, Mar 02, 2022 at 05:53:44PM +0800, Ming Lei wrote:
> Another point is that 'unsigned long *' is passed to xa_find() as index.
> However, almost all users of queue_for_each_hw_ctx() defines hctx index
> as 'unsigned int'.
>
> If we switch to xa_for_each(), the type of hctx index needs to be changed
> to 'unsigned long' for every queue_for_each_hw_ctx(). But xa_load()
> needn't such change.
>
> Also from user viewpoint, looks 'unsigned long' change for hctx index is
> still a bit confusing, IMO.
If you use xarray you need to fit the convention it expects, that should
not be in any way a surprise.
prev parent reply other threads:[~2022-03-02 9:59 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-28 9:04 [PATCH 0/6] blk-mq: update_nr_hw_queues related improvement & bugfix Ming Lei
2022-02-28 9:04 ` [PATCH 1/6] blk-mq: figure out correct numa node for hw queue Ming Lei
2022-03-01 13:30 ` Christoph Hellwig
2022-03-01 19:19 ` John Garry
2022-03-02 1:47 ` Ming Lei
2022-03-02 9:02 ` John Garry
2022-03-02 9:22 ` Ming Lei
2022-03-02 10:11 ` John Garry
2022-02-28 9:04 ` [PATCH 2/6] blk-mq: simplify reallocation of hw ctxs a bit Ming Lei
2022-03-01 13:30 ` Christoph Hellwig
2022-02-28 9:04 ` [PATCH 3/6] blk-mq: re-config poll after queue map is changed Ming Lei
2022-03-01 13:31 ` Christoph Hellwig
2022-02-28 9:04 ` [PATCH 4/6] block: mtip32xx: don't touch q->queue_hw_ctx Ming Lei
2022-03-01 13:32 ` Christoph Hellwig
2022-02-28 9:04 ` [PATCH 5/6] blk-mq: add helper of blk_mq_get_hctx to retrieve hctx via its index Ming Lei
2022-03-01 13:33 ` Christoph Hellwig
2022-02-28 9:04 ` [PATCH 6/6] blk-mq: manage hctx map via xarray Ming Lei
2022-02-28 17:36 ` kernel test robot
2022-02-28 17:57 ` kernel test robot
2022-03-01 9:08 ` Ming Lei
2022-03-01 13:37 ` Christoph Hellwig
2022-03-02 2:06 ` Ming Lei
2022-03-02 8:24 ` Christoph Hellwig
2022-03-02 9:53 ` Ming Lei
2022-03-02 9:59 ` Christoph Hellwig [this message]
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