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: Thu, 24 Jan 2019 11:08:12 -0700 [thread overview]
Message-ID: <531e1343-a941-0137-e21c-036ca8dfbd5a@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[].
I like this a lot, the current double indirect does suck, and it does show
up in profiles as well. I'll run some testing with this, thanks!
--
Jens Axboe
next prev parent reply other threads:[~2019-01-24 18:08 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 ` Jens Axboe [this message]
2019-02-01 15:34 ` [PATCH 0/2] small optimization for accessing queue map Jens Axboe
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