Messages in this thread | | | Date | Tue, 14 Apr 2009 20:50:58 +0200 | From | Andi Kleen <> | Subject | Re: Out-of-order writing by disk drives |
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On Tue, Apr 14, 2009 at 10:09:48PM +0400, Michael Tokarev wrote: > Andi Kleen wrote: > [] > >Where I see it as a problem is with virtualization; LVM seems to be the > >most sane way to manage file systems for lots of VMs and you likely > >want barriers there too. > > Virtualisation is the best fit for partitionable raid1 arrays. > It is, in fact, what we have here -- I tested LVM but rejected > it because of this very issue - it does not support barriers.
It does now as of 2.6.29, as long as you only have a single underlying device and use dm linear.
-Andi >
-- ak@linux.intel.com -- Speaking for myself only.
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