Re: REQUEST for new 'topology' metrics to be moved out of the 'queue' sysfs directory.

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On Fri, Jun 26 2009, NeilBrown wrote:
> 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??

The documentation doesn't really matter. The files are there and
released, so they cannot go away.

> 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 ??

What fields what that be? It's true that things like eg
max_hw_sectors_kb isn't strictly correct, but it still makes some sense
on pseudo-devices.

-- 
Jens Axboe

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