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SubjectRe: 2.5 'what to expect'
Date
elvtune is mentioned here...

DJ> - Several different IO elevators are available to match different types
DJ> of workload. You can select which one to use with elvtune.

but deprecated here:

DJ> Deprecated.
DJ> ~~~~~~~~~~~
DJ> - usbdevfs will be going away in 2.7. The same filesystem can
DJ> be mounted as 'usbfs' in recent 2.4 kernels, and in 2.5.52
DJ> and above, which is what the filesystem will furthermore be
DJ> known as.
DJ> - elvtune is deprecated (as are the ioctl's it used).
DJ> Instead, the io scheduler tunables are exported in sysfs (see below)
DJ> in the /sys/block/<device>/iosched directory.
DJ> Jens wrote a document explaining the tunables of the new scheduler at
DJ> http://www.lib.uaa.alaska.edu/linux-kernel/archive/2002-Week-44/att-deadline-iosched.txt

Maybe just suggest the sysfs interface at once and not mention elvtune?

--
Meelis Roos (mroos@linux.ee)
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