Re: headsup: swap_pager.c

From: David Schultz (das_at_freebsd.org)
Date: 08/01/03

  • Next message: Peter Jeremy: "Re: headsup: swap_pager.c" 
    Date: Fri, 1 Aug 2003 01:44:15 -0700
To: Poul-Henning Kamp <phk@phk.freebsd.dk>

    On Fri, Aug 01, 2003, Poul-Henning Kamp wrote:
    > In message <20030801082336.GA75619@HAL9000.homeunix.com>, David Schultz writes:
    >
    > >But since you just ripped out the debugging stuff for the radix
    > >tree bitmap, I'm guessing that your plan is to replace the bitmap
    > >with something else within the next few days anyway...
    >
    > I actually do not plan on replacing the radix code in this round.
    > I want to see how it performs before I vote it out. I don't currently
    > see any resource managers in the kernel which obviously would do
    > a better job.

    So why has the debugging support for the radix tree bitmaps been
    removed, then?

    > >Can you please describe how the interface between ccd(4) and the
    > >swap subsystem will work? I like this idea, but it isn't
    > >immediately obvious how you plan to implement striping based on
    > >load and dynamic addition and removal of swap space.
    >
    > ccdconfig -c ccd0 128 0 /dev/da0b /dev/da1b /dev/da2b
    > swapon /dev/ccd0

    That's what I thought, but the swap subsystem just sees one big
    virtual disk, and I now add /dev/da3b, how will the new space be
    interleaved with the existing space? How is it possible to
    support anything other than fixed interleave in this model?
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  • Next message: Peter Jeremy: "Re: headsup: swap_pager.c"