linux-kernel - Re: [dm-devel] [PATCH] block: flush queued bios when the process blocks

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Date:	Tue, 27 May 2014 12:59:54 -0700
From:	Kent Overstreet <kmo@...erainc.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Jens Axboe <axboe@...nel.dk>,
	Mikulas Patocka <mpatocka@...hat.com>,
	Mike Snitzer <msnitzer@...hat.com>,
	"Alasdair G. Kergon" <agk@...hat.com>,
	linux-kernel@...r.kernel.org, dm-devel@...hat.com
Subject: Re: [dm-devel] [PATCH] block: flush queued bios when the process
 blocks

On Tue, May 27, 2014 at 11:14:15AM -0700, Christoph Hellwig wrote:
> On Tue, May 27, 2014 at 11:42:26AM -0600, Jens Axboe wrote:
> > Except such a thing already exists, there are unplug callback
> > chains. All I'm asking is that you look into how feasible it would
> > be to use something like that, instead of reinventing the wheel.
> 
> I suspect the code from MD could be lifted quite easily.
> 
> It would be nicer to move it up to the block layer entirely, but when I
> tried that a while ago I ran into issues that I unfortunately don't
> remember.

How's md do it?
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