Messages in this thread | | | Date | Fri, 5 Dec 2008 13:29:30 +0100 | From | Andi Kleen <> | Subject | Re: Device loses barrier support (was: Fixed patch for simple barriers.) |
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> Not when the fundamental design of the code is broken and trashes > performance.
Sorry but that's just not correct. There's nothing in late failing barriers that "trashes performance". The file system writers have to be careful to handle it, but at least the current ones all do. And also if someone writes a hypothetical fully asynchronously driven barrier based IO transaction system it would be still possible to handle the late failing barrier without too many complications.
Also late failing barriers is pretty much the only sane way to implement barriers in software remapping schemes like DM and MD.
-Andi
-- ak@linux.intel.com
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