Date: Sun, 3 Aug 2003 00:20:37 +1000 (EST) From: Andy Farkas <andyf@speednet.com.au> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: arch@freebsd.org Subject: Re: headsup: swap_pager.c Message-ID: <20030802235543.N41132-100000@hewey.af.speednet.com.au> In-Reply-To: <10603.1059832005@critter.freebsd.dk>
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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/
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