[Bug 43484] Re: poor disk performance during heavy io

[DiegoCG]

While your idea may have sense, it shouldn't be reproducible with other
io schedulers, IMO. Maybe it's a SATA bug, dunno :/ Does the dmesg
differs in something in both kernels (not just SATA, but other things
aswell)? Your test (dd if=/dev/zero of=big bs=4M count=1k) takes more
time in the misbehaving version or the proble is just bad latency when
using vim and other "interactive" tools?

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poor disk performance during heavy io
https://launchpad.net/bugs/43484