Comment 605 for bug 620074
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a60fb26
(Get the code!)
About i/o schedulers. I a lot of read, that devices which have NCQ support not needing in schedulers, is it?
$ Dmesg | grep NCQ
[2.145261] ata1.00: 175836528 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
[3.109745] ata5.00: 2930277168 sectors, multi 16: LBA48 NCQ (depth 31/32)
Seems all my devices support NCQ. I manually set noop sheduler, and system was apparently much responsible. I hope this is not a placebo. If it true, so why not in the kernel will automatically switch off scheduler for devices which have NCQ support?