linux-kernel - Re: [PATCH 0/6] blk-mq: initialize pdu of flush req explicitly

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Message-ID: <20140907184956.GB23026@lst.de>
Date:	Sun, 7 Sep 2014 20:49:56 +0200
From:	Christoph Hellwig <hch@....de>
To:	Ming Lei <ming.lei@...onical.com>
Cc:	Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org, Christoph Hellwig <hch@....de>
Subject: Re: [PATCH 0/6] blk-mq: initialize pdu of flush req explicitly

This works fine for me, although I still don't really like it very much.

If you really want to go down the path of major surgery in this area we
should probably allocate a flush request per hw_ctx, and initialize it
using the normal init/exit functions.  If we want to have proper multiqueue
performance on devices needing flushes we'll need something like that anyway.
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