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Message-ID: <20090417194646.GC10554@vanheusden.com> Date: Fri, 17 Apr 2009 21:46:46 +0200 From: Folkert van Heusden <folkert@...heusden.com> To: Mark Lord <lkml@....ca> Cc: Andi Kleen <andi@...stfloor.org>, Anton Ertl <anton@...s.complang.tuwien.ac.at>, linux-kernel@...r.kernel.org Subject: Re: Out-of-order writing by disk drives >> A full listing of what devices do and don't support barriers would >> be likely very long. You would actually need to list down to hard disks. >> >> A common problem is barriers over LVM. Since 2.6.29 they work >> with a single device (and if the underlying device supports it) with >> dm linear, but not in any other LVM setup. > .. > > Does anyone else here find this rather peculiar? > The folks who actually care about barriers the most > (apart from kernel developers) are probably enterprise users. > And who is most likely to be using RAID and LVM, > where barriers generally don't work at all ? What about iSCSI? Does it support barriers? Folkert van Heusden -- MultiTail cok yonlu kullanimli bir program, loglari okumak, verilen kommandolari yerine getirebilen. Filter, renk verme, merge, 'diff- view', vs. http://www.vanheusden.com/multitail/ ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com -- 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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