lkml.org 
[lkml]   [2007]   [May]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [2.6.21.1] resume doesn't run suspended kernel?
Bill Davidsen wrote:
> Pavel Machek wrote:
>> On Sat 2007-05-26 18:42:37, Bill Davidsen wrote:
>>
>>> I was testing susp2disk in 2.6.21.1 under FC6, to support reliable
>>> computing environment (RCE) needs. The idea is that if power fails,
>>> after some short time on UPS the system does susp2disk with a time
>>> set, and boots back every so often to see if power is stable.
>>>
>>> No, I don't want susp2mem until I debug it, console come up in
>>> useless mode, console as kalidescope is not what I need.
>>>
>>> Anyway, I pulled the plug on the UPS, and the system shut down. But
>>> when it powered up, it booted the default kernel rather than the
>>> test kernel, decided that it couldn't resume, and then did a cold boot.
>>>
>>> I can bypass this by making the debug kernel the default, but WHY?
>>
>> HELL YES :-). We do not save kernel code into image.
>>
>>
> That's clear, I'll have to use xen or kvm or similar which restores
> the system as suspended. Thanks for the clarification of the limitations.
>
Sorry, I wrote that late at night and quickly. I should have said
"design decision" rather than "limitation," For systems which don't do
multiple kernels it's not an issue.

I certainly would not have made the same decision, but I didn't write
the code. It seems more robust to save everything than to try to
identify what has and hasn't changed in a modular kernel.

--
Bill Davidsen <davidsen@tmr.com>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-05-28 15:21    [W:0.085 / U:0.324 seconds]
©2003-2014 Jasper Spaans. Advertise on this site