Comment 61 for bug 539467

Revision history for this message
Torsten Spindler (tspindler) wrote : Re: [Bug 539467] Re: SATA link power management causes disk errors and corruption

I've run the following test:

while true
> do
> cat link_power_management_policy
> echo max_performance | sudo tee link_power_management_policy
> sleep 3
> echo min_power | sudo tee link_power_management_policy
> sleep 3
> done

While this loop is running, I've created some artificial fs activity:

while true
> do
> cat /boot/vmlinuz-2.6.38-020638rc5-generic > /dev/null
> sleep 1
> done

And also:

for n in $(seq 0 9)
> do
> sudo find /usr -type f -iname \*$n\* -exec cat {} > /dev/null \;
> done

I have found no signs of excepetion Emask in kern.log, the test was run
for more than 2 hours.

For completeness, uname -a:
Linux spitfire 2.6.38-020638rc5-generic #201102160907 SMP Wed Feb 16
10:18:56 UTC 2011 i686 GNU/Linux