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Hello |
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On Thu, May 31, 2007 at 01:28:20PM +0200, Hans-Werner Hilse wrote: |
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> On Sun, 27 May 2007 16:21:03 +0200 "Michal 'vorner' Vaner" |
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> <vorner@×××.cz> wrote: |
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> |
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> > First: You need to load the kernel from the swap, in the time it |
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> > loads, you have no running kernel (well, there is a little part, but |
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> > that one has no clue about network). |
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> |
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> No, that's not entirely true. Userspace suspend and resume is in the |
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> kernel since 2.6.17. See my other post in this thread for a pointer (I |
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> think it was http://suspend.sf.net/). So for this way it really happens |
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> all in userspace, with a fully working kernel available. When the image |
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> is loaded into RAM, the resume utility makes a syscall to have the |
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> kernel automatically copy & switch over. |
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> |
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> See /usr/src/linux/Documentation/power/*suspend* for all the details. |
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OK, I use suspend 1, which seems the least buggy to me, I did not know |
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some of the suspends were in userspace. If so, then yes, it can work. |
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> > Second: You do not want swap on nfs, since it is terribly slow, buggy, |
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> > nfs can allocate memory to transfer data and you get a circular |
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> > problem |
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> > - to get a memory, you need to get a memory. And, what if your cat |
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> > steps on the ethernet cable? |
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> |
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> Resume aborts, checksum error. But that's it. But true, I wouldn't |
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> trust NFS too much, either. But then, there are nbd's (network block |
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> devices) which would probably work a treat. But userspace resume from a |
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> file on NFS should work reliably, too. |
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No, that was not for resume, but for use of swap on NFS. You need fast |
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response from swap and reliability. |
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> > You might try suspend to ram, thought. It should work on diskless |
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> > machine as well as on any other. |
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> |
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> ...cough, cough... yeah, /as/ well as on any other. So this probably |
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> means: It won't work until you switch off ACPI and resort to APM... But |
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> of course, that will depend. |
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Why? It works fine for me. It just suspends and goes on the other day on |
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my laptop, all working by ACPI - with kernel suspend 1. |
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-- |
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This message has optimized support for formating. |
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Please choose green font and black background so it looks like it should. |
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|
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Michal 'vorner' Vaner |
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