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From: John Garry <john.garry@huawei.com>
To: Ming Lei <ming.lei@redhat.com>, Jens Axboe <axboe@kernel.dk>
Cc: <linux-block@vger.kernel.org>,
	Bart Van Assche <bvanassche@acm.org>,
	Hannes Reinecke <hare@suse.com>, Christoph Hellwig <hch@lst.de>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	Keith Busch <keith.busch@intel.com>,
	chenxiang <chenxiang66@hisilicon.com>
Subject: Re: [PATCH V4 3/5] blk-mq: stop to handle IO and drain IO before hctx becomes dead
Date: Thu, 28 Nov 2019 09:29:21 +0000	[thread overview]
Message-ID: <849aea76-755f-f06d-3927-13c35b7720cd@huawei.com> (raw)
In-Reply-To: <20191014015043.25029-4-ming.lei@redhat.com>

On 14/10/2019 02:50, Ming Lei wrote:
> 		break;
> +		msleep(5);
> +	}
> +}
> +
>   static int blk_mq_hctx_notify_online(unsigned int cpu, struct hlist_node *node)
>   {
> +	struct blk_mq_hw_ctx *hctx = hlist_entry_safe(node,
> +			struct blk_mq_hw_ctx, cpuhp_online);
> +
> +	if ((cpumask_next_and(-1, hctx->cpumask, cpu_online_mask) == cpu) &&
> +	    (cpumask_next_and(cpu, hctx->cpumask, cpu_online_mask) >=
> +	     nr_cpu_ids)) {
> +		set_bit(BLK_MQ_S_INTERNAL_STOPPED, &hctx->state);
> +		blk_mq_hctx_drain_inflight_rqs(hctx);

Hi Ming,

> +        }

This goes a bit beyond a nit: The indentation needs to be fixed here.

Thanks,
John

>   	return 0;
>   }
>   
> @@ -2246,6 +2284,8 @@ static int blk_mq_hctx_notify_dead(unsigned int cpu, struct hlist_node *node)
>   	ctx


  reply	other threads:[~2019-11-28  9:29 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-14  1:50 [PATCH V4 0/5] blk-mq: improvement on handling IO during CPU hotplug Ming Lei
2019-10-14  1:50 ` [PATCH V4 1/5] blk-mq: add new state of BLK_MQ_S_INTERNAL_STOPPED Ming Lei
2019-10-14  1:50 ` [PATCH V4 2/5] blk-mq: prepare for draining IO when hctx's all CPUs are offline Ming Lei
2019-10-14  1:50 ` [PATCH V4 3/5] blk-mq: stop to handle IO and drain IO before hctx becomes dead Ming Lei
2019-11-28  9:29   ` John Garry [this message]
2019-10-14  1:50 ` [PATCH V4 4/5] blk-mq: re-submit IO in case that hctx is dead Ming Lei
2019-10-14  1:50 ` [PATCH V4 5/5] blk-mq: handle requests dispatched from IO scheduler " Ming Lei
2019-10-16  8:58 ` [PATCH V4 0/5] blk-mq: improvement on handling IO during CPU hotplug John Garry
2019-10-16 12:07   ` Ming Lei
2019-10-16 16:19     ` John Garry
     [not found]       ` <55a84ea3-647d-0a76-596c-c6c6b2fc1b75@huawei.com>
2019-10-20 10:14         ` Ming Lei
2019-10-21  9:19           ` John Garry
2019-10-21  9:34             ` Ming Lei
2019-10-21  9:47               ` John Garry
2019-10-21 10:24                 ` Ming Lei
2019-10-21 11:49                   ` John Garry
2019-10-21 12:53                     ` Ming Lei
2019-10-21 14:02                       ` John Garry
2019-10-22  0:16                         ` Ming Lei
2019-10-22 11:19                           ` John Garry
2019-10-22 13:45                             ` Ming Lei
2019-10-25 16:33             ` John Garry
2019-10-28 10:42               ` Ming Lei
2019-10-28 11:55                 ` John Garry
2019-10-29  1:50                   ` Ming Lei
2019-10-29  9:22                     ` John Garry
2019-10-29 10:05                       ` Ming Lei
2019-10-29 17:54                         ` John Garry
2019-10-31 16:28                         ` John Garry
2019-11-28  1:09 ` chenxiang (M)
2019-11-28  2:02   ` Ming Lei
2019-11-28 10:45     ` John Garry

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