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Bug#620297: base: vmstat and /proc/loadavg disagree



On 02/04/2012 07:11 PM, Aman Gupta wrote:
> I tested the following kernels in tickless mode (CONFIG_NO_HZ=y), and
> they all contain the same load average reporting issue:
> 
> 2.6.37-rc5-cure-more
> 2.6.39.4
> 3.2.2
> 3.2.4
> 
> Lesław, can you confirm that newer kernels still surface the bug in
> your environment?

My appologies for the huge delay in responding. I finally finished
testing my batch of kernels and I can confirm your results - load is
still low on tickless kernels.

I have tested the 2.6.32 and 2.6.37 vanilla kernels with combinations of
CONFIG_NO_HZ set to 'y' and 'n'. Each kernel was compiled without any
patches, with just 74f5187ac8 and finally with 74f5187ac8 and 0f004f5a69
applied.

I have replied to your message to linux-kernel mailing list with a more
detailed description of my findings. I hope it will pique someone's
interest.

-- 
Lesław Kopeć

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