linux-kernel - Re: [PATCH 1/1] block: Use RCU in blk_mq_[un]quiesce_tagset() instead of set->tag_list

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Message-ID: <0efc5d59-53dc-44c6-9466-1f662af7ee7b@acm.org>
Date: Thu, 4 Dec 2025 16:52:49 -1000
From: Bart Van Assche <bvanassche@....org>
To: Keith Busch <kbusch@...nel.org>
Cc: Mohamed Khalfella <mkhalfella@...estorage.com>,
 Chaitanya Kulkarni <kch@...dia.com>, Christoph Hellwig <hch@....de>,
 Jens Axboe <axboe@...nel.dk>, Sagi Grimberg <sagi@...mberg.me>,
 Casey Chen <cachen@...estorage.com>, Yuanyuan Zhong
 <yzhong@...estorage.com>, Hannes Reinecke <hare@...e.de>,
 Ming Lei <ming.lei@...hat.com>, Waiman Long <llong@...hat.com>,
 Hillf Danton <hdanton@...a.com>, linux-nvme@...ts.infradead.org,
 linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] block: Use RCU in blk_mq_[un]quiesce_tagset() instead
 of set->tag_list_lock

On 12/4/25 3:32 PM, Keith Busch wrote:
> I'm not interested in introducing rcu synchronize here either. I guess I
> would make it so you can quiesce a tagset from a context that entered
> the queue. So quick shot at that here: [ ... ]
The approach of this patch looks very interesting to me. I will take a 
closer look at this patch when I have more time.

Thanks,

Bart.