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SubjectRe: [RFC] TuxOnIce
Date
On Thursday 07 May 2009, Pavel Machek wrote:
> Hi!
>
> > I'd like to submit TuxOnIce for review, with a view to seeking to get it
> > merged, perhaps in 2.6.31 or .32 (depending upon what needs work before
> > it can be merged) and the willingness of those who matter.
> >
> > To briefly summarise the advantages to merging TuxOnIce:
> >
> > - Support for multiple swap devices
> > - Support for non-swap (an ordinary file can be used)
> > - Uses cryptoapi (LZO support, more than 2x speed of uncompressed data!)
> > - Asynchronous I/O, readahead, multithreaded. Get the maximum throughput
> > possible with your hardware.
> > - Userspace user interface that lets you abort hibernating and abort
> > resuming, get nice progress display etc.
>
> All these are either done by uswsusp already, or could be done w/o
> modifying kernel code.
>
> > - 8 years of testing and improvement.
>
> Yeah, 8 years of out of tree testing; while current code is used by
> basically every distro out there.
>
> > - Full image of memory (LRU pages that don't need to be atomically
> > copied are saved prior to the atomic copy, then used as the
> > destination of the atomic copy).
>
> Yeah, that was the patch that did not go in
>
> > - Support for resuming a different image after writing an image - makes
> > powering down a UPS after writing an image doable.
>
>
> This can be done w/o kernel code. Someone had a patch...
>
> > - Simple to set up (works without any userspace binaries, uses existing
> > resume= and noresume commandline parameters).
>
> Given that distros ship uswsusp already... is that really an advantage.
>
> To summarise disadvantages:
>
> - only core has 8000 LoC
> - it does stuff that can be easily done in userspace
> (and that todays distros _do_ in userspace).
> - it duplicates uswsusp functionality.
> - compared to [u]swsusp, it received little testing

Actually, I see advantages of working together versus fighting flame wars.
Please stop that, I'm not going to take part in it this time.

Best,
Rafael


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