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Date: Thu, 25 Jun 2009 13:43:23 -0400 From: "Martin K. Petersen" <martin.petersen@...cle.com> To: John Robinson <john.robinson@...nymous.org.uk> Cc: NeilBrown <neilb@...e.de>, "Martin K. Petersen" <martin.petersen@...cle.com>, Mike Snitzer <snitzer@...hat.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Alasdair G Kergon <agk@...hat.com>, jens.axboe@...cle.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. >>>>> "John" == John Robinson <john.robinson@...nymous.org.uk> writes: John> Even sadder, when a raid 0/4/5/6 is reshaped over more discs (and John> probably other scenarios outwith md), I'm not sure I agree with the whole "sad" sentiment. Just because ext[234] doesn't query devices automatically doesn't mean the technology doesn't exist. I wrote the MD/LVM extraction code for XFS in 2001. John> both stripe-width and stride-size change. Is there any prospect John> this new stacking could give us the opportunity to tell our client John> (LVM, filesystem, whatever) about the change, or that they'll be John> able to take advantage of it? When you resize the fs it would have to compare the new topology to the old one and adjust accordingly. -- Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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