From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <cc09818140bd001be47b7150d715c158@coraid.com>
From: erik quanstrom <quanstro@coraid.com>
Date: Mon, 15 Oct 2007 13:58:23 -0400
To: 9fans@cse.psu.edu
Subject: Re: [9fans] 9pccpuf freezes (after replica/pull)
In-Reply-To: <10b109140710151031y31b23c26va35aeae81c45775a@mail.gmail.com>
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> On 10/15/07, erik quanstrom <quanstro@quanstro.net> wrote:
> > i wonder if the kernel is too big for the 4MB of temporary page
> > table mappings that l.s sets up.  the kernel itself decompresses
> > to ~3MB and starts at 1MB.  there's not much room for the
> > kernel pagetable..
> >
> > (i had that problem just over the weekend, but with ken's kernel.
> > switching to 4MB pages solved the problem.)
> >
> 
> How to do it?
> I compile my kernels exactly according to
> http://cm.bell-labs.com/wiki/plan9/Compiling_kernels
> 
> Antonin

you can make it significantly smaller by editing out stuff you're not
using.  typical targets are unused ethernet, video, disk drivers.
if you're not using usb or the bridge device, you can leave 'em out.
if you're not using kfs, you can get rid of that.  if you're not booting
from venti, you can get rid of that. in the ip section you can get
rid of gre, rudp and likely ipmux.

i've included the kernel conf i was using for testing booting cpuf
directly from aoe storage.  the kernel was "only" 2053582 bytes.
it would be about 1.5MB without the myricom driver.  (large
firmware.)

- erik


----

dev
	root
	cons
	arch
	pnp		pci
	env
	pipe
	proc
	mnt
	srv
	dup
	rtc
	ssl
	tls
	bridge		log
	sdp		thwack unthwack
	cap
	kprof
	fs

	ether		netif
	cec
	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium ptclbsum386 inferno
	aoe		ip

	sd
	uart

link
	realmode
	acpi
	ether82563	pci
	ether82557	pci
	etherigbe	pci ethermii
	ethersink
	ethermedium
	loopbackmedium
	etherm10g	pci

misc
	archmp		mp apic

	uarti8250
	uartpci		pci
	uartaxp		pci

	sdaoe
	sdiahci		pci sdscsi
	sdata		pci sdscsi

ip
	il
	tcp
	udp
	ipifc
	icmp
	icmp6
	gre
	ipmux
	esp
	rudp

port
	int cpuserver = 1;

boot cpu
	local
	tcp
	il

bootdir
	bootaoe.out boot
	/386/bin/fossil/fossil fossil
	/386/bin/ip/ipconfig ipconfig
	/386/bin/auth/factotum