On 03/03/2013 03:16 PM, Josh Berkus wrote:
> Steven,
>
>> We saw the same performance problems when this new hardware was running
>> cent 6.3 with a 2.6.32-279.19.1.el6.x86_64 kernel and when it was matched
>> to the OS/kernel of the old hardware which was cent 5.8 with
>> a 2.6.18-308.11.1.el5 kernel.
>
> Oh, now that's interesting. We've been seeing the same issue (IO stalls
> on COMMIT) ond had attributed it to some bugs in the 3.2 and 3.4
> kernels, partly because we don't have a credible "old server" to test
> against. Now you have me wondering if there's not a hardware or driver
> issue with a major HW manufacturer which just happens to be hitting
> around now.
>
> Can you detail your hardware stack so that we can compare notes?
>
>
The current Red Hat Enterprise Linux 6.4 kernel is
kernel-2.6.32-358.0.1.el6.x86_64
in case that matters.