At least a simple rotating/flash device division can be done quite easily, possibly in a udev script. Look at /sys/block/device/queue/rotational, if 1 write "cfq" to .../scheduler, else "noop"/"fiops". Possibly "noop" when /sys/block/device/removable is 1, "fiops" for 0. No idea if any distribution implements something like that, but it's nothing the kernel has to do.
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FIOPS: A New Linux I/O Scheduler For Flash/SSDs
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Originally posted by damg View PostI've always wondered if it would make sense to use SSDs as a new layer in the cache hierarchy rather than as an additional faster drive? e.g. hard disk -> SSD -> memory -> L3/L2/L1 caches -> registers.
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