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Date: Wed, 05 Nov 2008 23:21:25 +0100 From: Peter Zijlstra <peterz@...radead.org> To: David Woodhouse <dwmw2@...radead.org> Cc: Andrew Morton <akpm@...ux-foundation.org>, kay.sievers@...y.org, folkert@...heusden.com, jacmet@...site.dk, linux-kernel@...r.kernel.org Subject: Re: bdi: register sysfs bdi device only once per queue On Wed, 2008-11-05 at 23:10 +0100, David Woodhouse wrote: > On Wed, 2008-11-05 at 12:10 -0800, Andrew Morton wrote: > > > > Devices which share the same queue, like floppies and mtd devices, > > > > get registered multiple times in the bdi interface, but bdi accounts > > > > only the last registered device of the devices sharing one queue. > > > > > > David, is there any reason the mtd devices do this? > > > > [tap tap - is this thing turned on?] > > No particular reason. It's been done that way since the dawn of time, > when it was perfectly normal. Nobody's yet bothered to change that, when > changing the rules. I don't think it ever made sense, or was intended that way, but yeah it didn't really matter in any substantial way. I can remember touching some mtd stuff back when I did the per-bdi-writeback stuff, but I can't seem to recall all the details. Might be time to stare at the mtd code a bit... -- 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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