From: Jens Axboe <axboe@kernel.dk>
To: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/2] small optimization for accessing queue map
Date: Fri, 1 Feb 2019 08:34:46 -0700 [thread overview]
Message-ID: <94a2634f-24e2-b846-9c13-2fc9c0117e0c@kernel.dk> (raw)
In-Reply-To: <1548325533-1695-1-git-send-email-jianchao.w.wang@oracle.com>
On 1/24/19 3:25 AM, Jianchao Wang wrote:
> Hi Jens
>
> These two patches are small optimization for accessing the queue mapping
> in hot path. It saves the queue mapping results into blk_mq_ctx directly,
> then we needn't do the complicated bounce on queue_hw_ctx[] map[] and
> mq_map[].
Doing some targeted testing, the cycles wasted on the double indirect
are reclaimed with this. I've applied both for 5.1, thanks.
--
Jens Axboe
prev parent reply other threads:[~2019-02-01 15:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-24 10:25 Jianchao Wang
2019-01-24 10:25 ` [PATCH 1/2] blk-mq: save queue mapping result into ctx directly Jianchao Wang
2019-01-24 10:25 ` [PATCH 2/2] blk-mq: save default hctx into ctx->hctxs for not-supported type Jianchao Wang
2019-01-24 18:08 ` [PATCH 0/2] small optimization for accessing queue map Jens Axboe
2019-02-01 15:34 ` Jens Axboe [this message]
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