Re: Long delays while hibernating

[Pedro Ribeiro <pedrib@gmail.com>]

On Wed, Dec 23, 2009 at 7:47 AM, Tejun Heo <tj@kernel.org> wrote:
> On 12/23/2009 12:50 PM, Pedro Ribeiro wrote:
>> Hi,
>>
>> I have a 2.6.32.2 kernel with the TuxOnIce and KDB patches. When I
>> hibernate, the penultimate phase is the "Atomic copy/restore". On
>> normal conditions, this takes 1 second or less.
>>
>> I have a Thinkpad T400 with an ultrabay, which is a hot-swappable
>> drive enclosure, which can take in an optical drive (my case), hard
>> disk or extra battery.
>> To save some battery, I use the script here
>> http://www.thinkwiki.org/wiki/How_to_hotswap_UltraBay_devices#Script_for_Ultrabay_eject
>> to power off the ultrabay.
>>
>> Then when I hibernate with the ultrabay powered off, the "Atomic
>> copy/restore" phase takes 30 seconds and sometimes even a hard lockup
>> occurs.
>> Just at the start of "Atomic copy/restore", the drive gets polled (the
>> light flashes for a second and makes some loading noise) and then
>> takes the CPU to 100% (I can hear the fan roar) for 30 seconds.
>>
>> I'm sure this is related to the fact that the ultrabay is powered off.
>> There nothing else that triggers this.
>>
>> I tried using KDB to interrupt during this phase but that doesn't
>> work. Only after the operation is complete KDB jumps in, so there is
>> no way to interrupt whatever is happening.
>>
>> I reported this issue to the TuxOnIce developer, and he asked me to
>> report it to you.
>
> Can you please attach the output of dmidecode?
>
> Thanks.
>
> --
> tejun
>

Thanks for the quick reply, here is what you requested.
http://pastebin.com/m72748645


Pedro