linux-kernel - Re: [PATCH 1/1] block: rework flush sequencing for blk-mq

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Date:	Wed, 12 Mar 2014 12:07:31 +0100
From:	Hannes Reinecke <hare@...e.de>
To:	Christoph Hellwig <hch@...radead.org>
CC:	Mike Snitzer <snitzer@...hat.com>, Jeff Moyer <jmoyer@...hat.com>,
	Jens Axboe <axboe@...nel.dk>, Shaohua Li <shli@...ionio.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	msnitzer <msnitzer@...hat.com>
Subject: Re: [PATCH 1/1] block: rework flush sequencing for blk-mq

On 03/12/2014 11:55 AM, Christoph Hellwig wrote:
> On Wed, Mar 12, 2014 at 11:50:13AM +0100, Hannes Reinecke wrote:
>> >From the device-mapper side we have these patches which are not
>> included upstream:
> 
> Another one on the dm side that seems useful is:
> 
> dm-emulate-blkrrpart-ioctl:
>   Partitions on device-mapper devices are managed by kpartx (if at
>   all). So if we were just to send out a 'change' event if someone
>   called BLKRRPART on these devices, kpartx will be triggered via udev
>   and can manage the partitions accordingly.
> 
Which I've omitted for a reason; looks like these kind of things it
handled in userspace nowadays.
It will also cause 'parted' to emit 'change' events when you just
display a device. Which is _not_ want we want.
So this patch will be pulled, even from SUSE.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@...e.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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