kswapd0 consuming 50% of cpu

[Bruno Wolff III]

On Mon, Nov 26, 2012 at 12:19:11 -0700,
   JD <jd1008 at gmail.com> wrote:
>
>The Read/Write failures started in 3.6.X kernels, but do not appear in 3.7.
>3.7  is doing the right thing by first issuing a hard reset to the sleeping
>drives before reading or committing the journals. 3.6.X was not sending any
>hard resets to the sleeping drives.
>I will be testing 3.6.7 to see if either of these issues is still present.

If it isn't, you can ask the Fedora kernel guys to batch port the fix. If 
the fix is upstream, you can often get them to back port it.