Re: headsup: swap_pager.c

From: Andy Farkas (andyf_at_speednet.com.au)
Date: 08/02/03

  • Next message: Poul-Henning Kamp: "Re: headsup: swap_pager.c" 
    Date: Sun, 3 Aug 2003 00:20:37 +1000 (EST)
To: Poul-Henning Kamp <phk@phk.freebsd.dk>

    Poul-Henning Kamp wrote:

    > >You say
    > >"bogo-vnode". Please explain what that means.
    >
    > A bogos vnode.

    More would've been nice.

    > >What does "in a pinch" mean??
    >
    > That for instance you are running out of swap, if NSWAPDEV==1 you cannot
    > add another swapdev because the one and only slot is occupied (and the
    > device is filled too).

    "running out of swap" is a situation I was *not* in, yet my system was
    totally unresponsive because it was continuously swapping. The physical
    disk could not keep up with page-in demand. How am I supposed to magically
    "add" another [physical] disk while the box is spasticly trying to swap
    around a 200M plus working-set into 32M physical RAM. When you're box
    starts swapping (in *my* experience) your box is fsck'd.

    All I'm saying is that whatever you do with the code (and I don't give a
    fsck what happens to it) it aint gonna fix, or change, anything. You are
    wasting your time. And no, i'm not telling you what or how to code.

    > >What do those numbers in kern.malloc mean??
    >
    > That the corresponding amount of RAM is unchangably occupied by a table
    > which is 3/4 empty and therefore nothing else can use that RAM productively.

    # sysctl kern.malloc | grep -i swap
             SWAP 2 73K 137K 12 64,65536

    Again, more explaining would be good.

    "corresponding amount of RAM" [you must mean the 73K and 173K values]
    "unchangably occupied" [my values change as I add and remove swap devices]
    "by a table which is 3/4 empty" [fixed by specifying NSWAPDEV=1]

    Please, bash me more...I still dont understand why you are trying to fix
    unbroken code... yes, I feel very alone in my crusade... 

    --
 :{ andyf@speednet.com.au
        Andy Farkas
    System Administrator
   Speednet Communications
 http://www.speednet.com.au/
_______________________________________________
freebsd-arch@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-arch
To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org"
  • Next message: Poul-Henning Kamp: "Re: headsup: swap_pager.c"

    Relevant Pages