kswapd0 consuming 50% of cpu

[JD]

On 11/26/2012 01:11 PM, Bruno Wolff III wrote:
> 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.
>

FYI - for the fun of it.

Just rebooted back into 3.7.0

Tasks: 202 total,   2 running, 200 sleeping,   0 stopped,   0 zombie
Cpu(s):  5.9%us, 93.7%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi, 0.3%si,  
0.0%st
Mem:   2065884k total,  1551872k used,   514012k free,   419776k buffers
Swap:  8385924k total,        0k used,  8385924k free,   470868k cached

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+ COMMAND
    24 root      20   0     0    0    0 R 87.8  0.0   2:50.54 kswapd0
                                            ^
                                            ^
                                            ^
                           It just doesn't get any better than this :)