linux-kernel - Re: [dm-devel] REQUEST for new 'topology' metrics to be moved out of the 'queue' sysfs directory.

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Message-ID: <7c458f2470811a877dd60203b9bbb7ac.squirrel@neil.brown.name>
Date:	Fri, 26 Jun 2009 23:16:59 +1000 (EST)
From:	"NeilBrown" <neilb@...e.de>
To:	"Jens Axboe" <jens.axboe@...cle.com>
Cc:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	"Mike Snitzer" <snitzer@...hat.com>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Alasdair G Kergon" <agk@...hat.com>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	"device-mapper development" <dm-devel@...hat.com>
Subject: Re: [dm-devel] REQUEST for new 'topology' metrics to be moved out 
     of the 'queue' sysfs directory.

On Fri, June 26, 2009 10:50 pm, Jens Axboe wrote:
> On Fri, Jun 26 2009, Neil Brown wrote:

>> But for now, please please please can we revert the change which made
>> 'queue' appear in md and dm devices, (and loop and ...) and put these
>> generic values somewhere ... generic?
>
> No we cannot, not without a time machine. 2.6.30 is released, so it's
> too late to revert things like that, even if we wanted.

Drat... for some reason I was thinking that it only came in in 2.6.31-rc.
However it is only documented in ABI/testing, not ABI/stable ... if there
is any value in that distinction, then it should be possible to move it??

Well, maybe I'm too late.
If I send you a patch to remove all those fields in 'queue' that are not
relevant to md/dm (when the queue is used for an md/dm device) would that
be OK ??

NeilBrown


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