Building Your Own Linux Kernel: Tricky kernel options (part 3)
Oct 22, 2009, 16:03 (2 Talkback[s])
(Other stories by Akkana Peck)
Re-Imagining Linux Platforms to Meet the Needs of Cloud Service Providers
"Block Layer: IO Schedulers
"Under "Enable the block layer" lies an option you probably
wouldn't think to look at: "IO Schedulers". That's obviously some
kind of übergeeky option that only a kernel developer would
care about, right?
"Well, mostly true. But if you're on a netbook, there's a hidden
option you should know about: the No-op scheduler.
"IO schedulers manage disk reads and writes to try to reduce the
number of times the disk head has to move. But with a solid-state
drive, there's no disk head, and all this smart scheduling can
actually hurt performance.
"Under IO Schedulers --> Default I/O scheduler, you'll see an
option for the "No-op" scheduler (Figure 1). If your main disk is
solid-state, try it. You may see an improvement."