linux-kernel - Re: [PATCH v7 3/8] selftests: ublk: kublk: tie sqe allocation to io instead of queue

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Message-ID: <aDgsups3ZCp3p3aq@fedora>
Date: Thu, 29 May 2025 17:45:30 +0800
From: Ming Lei <ming.lei@...hat.com>
To: Uday Shankar <ushankar@...estorage.com>
Cc: Jens Axboe <axboe@...nel.dk>,
	Caleb Sander Mateos <csander@...estorage.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Shuah Khan <shuah@...nel.org>, Jonathan Corbet <corbet@....net>,
	linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH v7 3/8] selftests: ublk: kublk: tie sqe allocation to io
 instead of queue

On Tue, May 27, 2025 at 05:01:26PM -0600, Uday Shankar wrote:
> We currently have a helper ublk_queue_alloc_sqes which the ublk targets
> use to allocate SQEs for their own operations. However, as we move
> towards decoupled ublk_queues and ublk server threads, this helper does
> not make sense anymore. SQEs are allocated from rings, and we will have
> one ring per thread to avoid locking. Change the SQE allocation helper
> to ublk_io_alloc_sqes. Currently this still allocates SQEs from the io's
> queue's ring, but when we fully decouple threads and queues, it will
> allocate from the io's thread's ring instead.
> 
> Signed-off-by: Uday Shankar <ushankar@...estorage.com>

Reviewed-by: Ming Lei <ming.lei@...hat.com>

Thanks,
Ming