linux-kernel - Re: [RESEND PATCH] xen/blkfront: convert to blk-mq APIs

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Date:	Sat, 11 Jul 2015 04:23:38 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	Bob Liu <bob.liu@...cle.com>, linux-kernel@...r.kernel.org,
	axboe@...com, hch@...radead.org, xen-devel@...ts.xenproject.org,
	avanzini.arianna@...il.com, david.vrabel@...rix.com,
	marcus.granado@...rix.com, roger.pau@...rix.com
Subject: Re: [RESEND PATCH] xen/blkfront: convert to blk-mq APIs

On Sat, Jul 11, 2015 at 07:17:18AM -0400, Konrad Rzeszutek Wilk wrote:
> The 'locked' parameter can be used to tell the function to not take the lock.
> 
> But it would drop the lock in both cases.

Konrad,

no conditional locking please.  Split the functionality up in multiple
functions if you may call with or without a lock held.

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