Date: Tue, 23 Jul 1996 13:02:13 -0400 (EDT) From: Dmitry Kohmanyuk <dk@dog.farm.org> To: phk@critter.tfs.com (Poul-Henning Kamp) Cc: dk+@ua.net, freebsd-hackers@FreeBSD.org Subject: Re: lp booting: first cut Message-ID: <199607231702.NAA06537@dog.farm.org> In-Reply-To: <3892.838134990@critter.tfs.com> from Poul-Henning Kamp at "Jul 23, 96 05:16:30 pm"
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Quoting Poul-Henning Kamp:
> The plip stuff depends on the speed of both cpus, it's very finiky.
I would say `dark magic' ;-)
I plan to hack somewhat on this, too. (eating 30-40% of CPU is just too much
;-)
> >unfortunately, the kernel cannot proceed to single-user (all it
> >says is `NFS SWAP:' and `NFS ROOT:' lines). I am trying to figure what's
> >wrong now. Previously, I had error 65 (no route to host) in nfs/nfs_vfsops.c,
> >but I have fixed that by adding explicit gateway.
>
> There is some utterly disgusting code that tries to find a ed%d interface
> to use in the kernel. That would be a problem. You need to explain
> to it that it's a lp0 interface instead in this case. The right medium
> for this explanation is the struct nfs_diskless (?) and since you change
> that you need to change the version# of it, and then locore.s to copy
> the right number of bytes. (Yes, I hate it too)
Yes, the code is there, but it is just a not-related hack.
I have already used the Source to find to proper way to do it.
I don't need to change struct nfs_diskless. myif has fields for interface name
("lp0"), address, broadcast (used as destionation address for point-to-point
in SIOCAIFADDR - took me some time to figure out), and mask.
The only magic added was setting broadcast to gateway if netmask is all ones,
and this change was done in boot/netboot/main.c. No core kernel code touched.
Now if somebody would explain me how to trace this mysterious hang by DDB.
I try to boot -s, and still get a hang. ctrl-alt-esc just throws me into
debugger with stack trace down to idleloop() or something. `ps' in ddb
doesn't show anything but a basic crowd (swapper init pagedaemon vmdaemon
update). I would try to boot -d now.
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