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    SubjectRe: When will the lunacy end? (Was Re: [PATCH] uswsusp: add pmops->{prepare,enter,finish} support (aka "platform mode"))
    Date
    On Tuesday, 26 September 2006 00:45, Pavel Machek wrote:
    > Hi!
    >
    > On Mon 2006-09-25 14:45:58, Andrew Morton wrote:
    > > On Tue, 26 Sep 2006 07:34:03 +1000
    > > Nigel Cunningham <ncunningham@linuxmail.org> wrote:
    > >
    > > > </rant>
    > >
    > > metoo! I'd suggest that it'd be better to be expending the grey cells on
    > > making the present suspend stuff nice and solid, stable and fast.
    >
    > [Un?]fortunately, Novell has some suggestions how I should expend my
    > grey cells in this area.
    >
    > Anyway you want:
    >
    > nice)
    > not sure if me + Rafael can do much here. Perhaps someone else
    > has to go through the code and rewrite it one more time? Or do
    > you have specific areas where suspend is really ugly?
    >
    > solid)
    > apart from HIGHMEM64G fiasco, and related agpgart fiasco long
    > time before that... these are driver problems...
    >
    > stable)
    > I believe we are doing pretty well in this area. We did not
    > have too many regressions, did we? (And notice that nice+fast
    > are actually both conflicting goals with stable).
    >
    > fast)
    > frankly, that is not my priority for in-kernel
    > suspend. uswsusp will always be few seconds faster, thanks to
    > LZW. If we do 40MB/sec or 50MB/sec during write is not that
    > important. Patches are always welcome.

    Actually, swsusp with the speed-up patches requires quite a lot of RAM to
    write to disk asynchronously. This effectively means that on my box the image
    size should not exceed 3/8 of the total RAM size, or the synchronous writing
    will start due to the lack of memory.

    uswsusp doesn't seem to have this problem.

    Greetings,
    Rafael


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