Messages in this thread | | | From | Chris Samuel <> | Subject | Re: 2.6.38.3 and 2.6.39-rc4 hangs after "Booting the kernel" on quad Pentium Pro system | Date | Sat, 23 Apr 2011 10:16:18 +1000 |
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Syt mae Alan! ;-)
On Sat, 23 Apr 2011 02:34:22 AM Alan Cox wrote:
> earlyprintk=vga
Ahh, that's a new one on me, and it reveals that the kernel has gone from 2.6.18 detecting:
256MB LOWMEM available.
to 2.6.39-rc4 detecting:
16MB LOWMEM available.
That would explain an awful lot..
> (or better yet earlyprintk=ttyS0 and a serial port)
Hmm, I might still have a null modem cable hanging around..
> There are a couple of PPro funnies - there's an area of memory that > must be excluded due to a chip errata and I seem to remember some > PPro boxes also having slightly quirking E820 (BIOS memory > reporting behaviour)
Sigh, that's just reminded me that a couple of years ago I had a private discussion with H. Peter Anvin about 2.6.25 panic'ing on boot with:
initrd extends beyond end of memory (0x0ffef173 > ox01000000)
He gave me a modified syslinux to dump out memory information and it reported:
INT 15h = f000:f859 DOS RAM: 638K (0x9f800) INT 12h: 638K (0x9f800) INT 15 88: 0x3c00 (15360K) INT 15 E801: 0x0000 (0K) 0x0000 (0K)
He responded with:
# Right... you have a system dependent on E801, and somehow E801 # returns crap. # # I'm going to cook up a modified meminfo.c32 for you and see if # we can't track this down.
Unfortunately nothing happened and when I prodded him it turned out he'd been too busy, so I just kept on running old kernels from that point on and completely forgot about why. :-(
Hope life is still good in Abertawe!
Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC
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