From: Jens Axboe <axboe@kernel.dk>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-block@vger.kernel.org
Subject: Re: avoid a few q_usage_counter roundtrips v3
Date: Tue, 19 May 2020 09:43:07 -0600 [thread overview]
Message-ID: <aa30fd0d-e107-f99d-3979-f6e0199f6a61@kernel.dk> (raw)
In-Reply-To: <20200516182801.482930-1-hch@lst.de>
On 5/16/20 12:27 PM, Christoph Hellwig wrote:
> Hi Jens,
>
> the way we track reference on q_usage_counter is a little weird at the
> moment, in that we often have to grab another reference in addition to
> the current one. This small series reshuffles that to avoid the extra
> references in the normal I/O path.
>
> Changes since v2:
> - increase the q_usage_counter critical section a bit in
> blk_mq_alloc_request_hctx
>
> Changes since v1:
> - rebased to the lastest for-5.8/block tree with the blk-crypt addition
Applied, thanks.
--
Jens Axboe
prev parent reply other threads:[~2020-05-19 15:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-16 18:27 avoid a few q_usage_counter roundtrips v3 Christoph Hellwig
2020-05-16 18:27 ` [PATCH 1/4] blk-mq: move the call to blk_queue_enter_live out of blk_mq_get_request Christoph Hellwig
2020-05-16 18:27 ` [PATCH 2/4] blk-mq: remove a pointless queue enter pair in blk_mq_alloc_request Christoph Hellwig
2020-05-16 18:28 ` [PATCH 3/4] blk-mq: remove a pointless queue enter pair in blk_mq_alloc_request_hctx Christoph Hellwig
2020-05-16 18:44 ` Bart Van Assche
2020-05-16 18:28 ` [PATCH 4/4] blk-mq: allow blk_mq_make_request to consume the q_usage_counter reference Christoph Hellwig
2020-05-19 15:43 ` Jens Axboe [this message]
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