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Date:   Wed, 12 Apr 2023 09:20:09 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Damien Le Moal <dlemoal@kernel.org>
Cc:     Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
        Bart Van Assche <bvanassche@acm.org>,
        linux-block@vger.kernel.org
Subject: Re: [PATCH 08/18] blk-mq: fold __blk_mq_insert_req_list into
 blk_mq_insert_request
Message-ID: <20230412072009.GA21504@lst.de>
References: <20230412053248.601961-1-hch@lst.de> <20230412053248.601961-9-hch@lst.de> <fd0e02c6-8fbb-cb7b-4925-331c132aeb7a@kernel.org>
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On Wed, Apr 12, 2023 at 04:16:36PM +0900, Damien Le Moal wrote:
> >  	} else {
> > +		trace_block_rq_insert(rq);
> 
> Shouldn't we keep the trace call under ctx->lock to preserve precise tracing ?

ctx->lock doesn't synchronize any of the in the request that is traced
here.