Re: [PATCH 0/2] Kexec jump: The first step to kexec base hibernation

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From: Rafael J. Wysocki

Subject: Re: [PATCH 0/2] Kexec jump: The first step to kexec base hibernation

Date: Thursday, July 12, 2007 - 8:35 am

On Thursday, 12 July 2007 15:51, Mark Lord wrote:
quoted text> Rafael J. Wysocki wrote:
> > On Thursday, 12 July 2007 08:43, david@lang.hm wrote:
> >> On Wed, 11 Jul 2007, Jeremy Fitzhardinge wrote:
> >>
> >>> Andrew Morton wrote:
> ..
> >> 8. hibernate kernel does syspend-to-ram to put the devices into a known 
> >> safe state.
> > Again, the devices should be quiesced rather then suspended in this step.
> 
> That's just not possible.  The Hibernate kernel will not have all
> of the same device drivers as the mainline kernel.  Or at least that's
> what people have previously stated here.

OK, one more problem to solve. :-)

quoted text> >>>>  This sounds awesome.  Am I correct in expecting that ultimately the
> >>>>  existing hibernation implementation just goes away and we reuse (and hence
> >>>>  strengthen) the existing kexec (and kdump?) infrastructure?
> 
> No, not so simple.  We still need much of the code to santize devices
> upon wakeup from hibernation.   And adding this extra reboot-kernel step
> in the midst of hibernate will double the time it takes (ugh).
> 
> Currently, TuxOnIce(suspend2) takes about 10 seconds to suspend my notebook.
> Switching to this new scheme would double that to 10 seconds to boot/probe,
> plus the original 10 seconds to hibernate.  Assuming the new implementation
> even comes close to suspend2 speed.

How much RAM is there in your machine?

Greetings,
Rafael


-- 
"Premature optimization is the root of all evil." - Donald Knuth
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Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Pavel Machek, (Wed Jul 11, 4:13 am)

[PATCH 0/2] Kexec jump: The first step to kexec base hiber ..., Huang, Ying, (Wed Jul 11, 8:30 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Andrew Morton, (Wed Jul 11, 5:22 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Jeremy Fitzhardinge, (Wed Jul 11, 10:48 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Wed Jul 11, 11:43 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 12:03 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Pavel Machek, (Thu Jul 12, 1:54 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 3:10 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Thu Jul 12, 5:38 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Thu Jul 12, 5:46 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Thu Jul 12, 5:47 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Thu Jul 12, 5:53 am)

Re: [PATCH 0/2] Kexec jump: The first step to , Rafael J. Wysocki, (Thu Jul 12, 6:01 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., jimmy bahuleyan, (Thu Jul 12, 6:22 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Mark Lord, (Thu Jul 12, 6:51 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Mark Lord, (Thu Jul 12, 6:55 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Pavel Machek, (Thu Jul 12, 7:06 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Thu Jul 12, 7:43 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Pavel Machek, (Thu Jul 12, 7:49 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Thu Jul 12, 8:35 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Mark Lord, (Thu Jul 12, 9:03 am)

Re: [linux-pm] Re: [PATCH 0/2] Kexec jump: The first step ..., Alan Stern, (Thu Jul 12, 9:09 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Thu Jul 12, 9:28 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Eric W. Biederman, (Thu Jul 12, 9:32 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Mark Lord, (Thu Jul 12, 9:35 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Thu Jul 12, 10:09 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Thu Jul 12, 10:18 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 11:42 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 11:49 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 11:57 am)

Re: [PATCH 0/2] Kexec jump: The first step to , david, (Thu Jul 12, 12:03 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 12:05 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 12:09 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 12:14 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Thu Jul 12, 12:20 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Thu Jul 12, 12:34 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Thu Jul 12, 12:45 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Eric W. Biederman, (Thu Jul 12, 12:49 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Jeremy Maitin-Shepard, (Thu Jul 12, 12:55 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Jeremy Maitin-Shepard, (Thu Jul 12, 1:05 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Thu Jul 12, 1:45 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Mark Lord, (Thu Jul 12, 7:38 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 8:06 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Thu Jul 12, 8:12 pm)

Hibernating To Swap Considered Harmful, Joseph Fannin, (Thu Jul 12, 10:42 pm)

Re: Hibernating To Swap Considered Harmful, david, (Thu Jul 12, 10:57 pm)

Re: Hibernating To Swap Considered Harmful, Joseph Fannin, (Thu Jul 12, 11:20 pm)

Re: Hibernating To Swap Considered Harmful, david, (Thu Jul 12, 11:27 pm)

Re: Hibernating To Swap Considered Harmful, Joseph Fannin, (Fri Jul 13, 12:15 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Fri Jul 13, 2:17 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Fri Jul 13, 2:25 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Fri Jul 13, 2:29 am)

Re: Hibernating To Swap Considered Harmful, Rafael J. Wysocki, (Fri Jul 13, 2:30 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Fri Jul 13, 2:38 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Fri Jul 13, 4:41 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Fri Jul 13, 4:59 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Fri Jul 13, 5:01 am)

Re: Hibernating To Swap Considered Harmful, Jeremy Maitin-Shepard, (Fri Jul 13, 7:35 am)

Re: [linux-pm] Re: [PATCH 0/2] Kexec jump: The first step ..., Alan Stern, (Fri Jul 13, 7:37 am)

Re: [linux-pm] Re: [PATCH 0/2] Kexec jump: The first step ..., Rafael J. Wysocki, (Fri Jul 13, 8:31 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Eric W. Biederman, (Fri Jul 13, 9:43 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Fri Jul 13, 10:32 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Fri Jul 13, 4:15 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Fri Jul 13, 4:18 pm)

Re: Hibernating To Swap Considered Harmful, Joseph Fannin, (Fri Jul 13, 5:45 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Fri Jul 13, 10:48 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sat Jul 14, 12:12 am)

Re: [linux-pm] Re: [PATCH 0/2] Kexec jump: The first step ..., david, (Sat Jul 14, 12:13 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sat Jul 14, 12:51 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sat Jul 14, 1:33 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sat Jul 14, 2:24 am)

Re: Hibernating To Swap Considered Harmful, Rafael J. Wysocki, (Sat Jul 14, 2:48 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sat Jul 14, 2:59 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Sat Jul 14, 3:55 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sat Jul 14, 12:16 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sat Jul 14, 1:00 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sat Jul 14, 1:34 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sat Jul 14, 2:06 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sat Jul 14, 2:13 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sat Jul 14, 2:34 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Sun Jul 15, 2:30 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sun Jul 15, 3:31 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sun Jul 15, 3:39 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sun Jul 15, 3:49 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sun Jul 15, 12:23 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sun Jul 15, 12:33 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sun Jul 15, 3:59 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Sun Jul 15, 4:11 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sun Jul 15, 4:22 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Sun Jul 15, 4:33 pm)

Re: Hibernating To Swap Considered Harmful, Joseph Fannin, (Sun Jul 15, 10:37 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Mon Jul 16, 5:17 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Mon Jul 16, 7:42 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Mon Jul 16, 8:40 am)

Re: Hibernating To Swap Considered Harmful, Joseph Fannin, (Mon Jul 16, 5:12 pm)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Mon Jul 16, 9:18 pm)

Re: Hibernating To Swap Considered Harmful, Oliver Neukum, (Mon Jul 16, 10:44 pm)

Re: Hibernating To Swap Considered Harmful, Joseph Fannin, (Mon Jul 16, 11:28 pm)

Re: Hibernating To Swap Considered Harmful, david, (Mon Jul 16, 11:42 pm)

Re: Hibernating To Swap Considered Harmful, Oliver Neukum, (Tue Jul 17, 12:10 am)

Re: Hibernating To Swap Considered Harmful, Joseph Fannin, (Tue Jul 17, 12:26 am)

Re: Hibernating To Swap Considered Harmful, david, (Tue Jul 17, 12:34 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., david, (Tue Jul 17, 1:13 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Tue Jul 17, 4:46 am)

Re: Hibernating To Swap Considered Harmful, Rafael J. Wysocki, (Tue Jul 17, 4:52 am)

Re: Hibernating To Swap Considered Harmful, Rafael J. Wysocki, (Tue Jul 17, 4:54 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec , Rafael J. Wysocki, (Tue Jul 17, 4:59 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Tue Jul 17, 5:48 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec , Rafael J. Wysocki, (Tue Jul 17, 7:22 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec , david, (Tue Jul 17, 5:25 pm)

RE: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Huang, Ying, (Tue Jul 24, 7:00 am)

Re: [PATCH 0/2] Kexec jump: The first step to kexec base h ..., Rafael J. Wysocki, (Tue Jul 24, 8:27 am)

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