From: Hannes Reinecke <hare@suse.de>
To: Ming Lei <ming.lei@redhat.com>, Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, John Garry <john.garry@huawei.com>,
Bart Van Assche <bvanassche@acm.org>,
Hannes Reinecke <hare@suse.com>, Christoph Hellwig <hch@lst.de>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH V9 05/11] blk-mq: support rq filter callback when iterating rqs
Date: Mon, 4 May 2020 09:04:54 +0200 [thread overview]
Message-ID: <b6e57562-b2c8-0b2b-5bd2-7d09edf9e051@suse.de> (raw)
In-Reply-To: <20200502235454.1118520-6-ming.lei@redhat.com>
On 5/3/20 1:54 AM, Ming Lei wrote:
> Now request is thought as in-flight only when its state is updated as
> MQ_RQ_IN_FLIGHT, which is done by driver via blk_mq_start_request().
>
> Actually from blk-mq's view, one rq can be thought as in-flight
> after its tag is >= 0.
>
> Passing one rq filter callback so that we can iterating requests very
> flexible.
>
> Implement blk_mq_all_tag_busy_iter() which accepts a 'busy_fn' argument
> to filter over which commands to iterate, and make the existing
> blk_mq_tag_busy_iter() a wrapper for the new function.
>
> Cc: John Garry <john.garry@huawei.com>
> Cc: Bart Van Assche <bvanassche@acm.org>
> Cc: Hannes Reinecke <hare@suse.com>
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> Signed-off-by: Ming Lei <ming.lei@redhat.com>
> ---
> block/blk-mq-tag.c | 39 +++++++++++++++++++++++++++------------
> block/blk-mq-tag.h | 4 ++++
> 2 files changed, 31 insertions(+), 12 deletions(-)
>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@suse.de +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
next prev parent reply other threads:[~2020-05-04 7:04 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-02 23:54 [PATCH V9 00/11] blk-mq: improvement CPU hotplug Ming Lei
2020-05-02 23:54 ` [PATCH V9 01/11] block: clone nr_integrity_segments and write_hint in blk_rq_prep_clone Ming Lei
2020-05-02 23:54 ` [PATCH V9 02/11] block: add helper for copying request Ming Lei
2020-05-02 23:54 ` [PATCH V9 03/11] blk-mq: mark blk_mq_get_driver_tag as static Ming Lei
2020-05-02 23:54 ` [PATCH V9 04/11] blk-mq: assign rq->tag in blk_mq_get_driver_tag Ming Lei
2020-05-02 23:54 ` [PATCH V9 05/11] blk-mq: support rq filter callback when iterating rqs Ming Lei
2020-05-04 7:04 ` Hannes Reinecke [this message]
2020-05-02 23:54 ` [PATCH V9 06/11] blk-mq: prepare for draining IO when hctx's all CPUs are offline Ming Lei
2020-05-02 23:54 ` [PATCH V9 07/11] blk-mq: stop to handle IO and drain IO before hctx becomes inactive Ming Lei
2020-05-02 23:54 ` [PATCH V9 08/11] block: add blk_end_flush_machinery Ming Lei
2020-05-02 23:54 ` [PATCH V9 09/11] blk-mq: add blk_mq_hctx_handle_dead_cpu for handling cpu dead Ming Lei
2020-05-02 23:54 ` [PATCH V9 10/11] blk-mq: re-submit IO in case that hctx is inactive Ming Lei
2020-05-02 23:54 ` [PATCH V9 11/11] block: deactivate hctx when the hctx is actually inactive Ming Lei
2020-05-04 8:14 ` [PATCH V9 00/11] blk-mq: improvement CPU hotplug John Garry
2020-05-04 8:38 ` Ming Lei
2020-05-04 9:07 ` John Garry
2020-05-04 9:57 ` John Garry
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