Messages in this thread | | | Date | Thu, 1 Mar 2001 12:12:11 +0000 | From | Pavel Machek <> | Subject | Re: 2.4.2-ac6 hangs on boot w/AMD Elan SC520 dev board |
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Hi!
> > bios-e820: 000000000009f400 @ 0000000000000000 (usable) > > bios-e820: 0000000000000c00 @ 000000000009f400 (reserved) > > bios-e820: 0000000003f00000 @ 0000000000100000 (usable) > > bios-e820: 0000000003f00000 @ 0000000000100000 (usable) > > bios-e820: 0000000000100000 @ 00000000fff00000 (reserved) > > (at this point, it appears to be in an infinite printk loop <?>) > > > > I didn't spend much time looking into the printk loop, but it seems to > > end up there, even if CONFIG_DEBUG_BUGVERBOSE is not defined, as if the > > ".byte 0x0f,0x0b" is causing the loop to begin. > > > > Any ideas/suggestions/comments? > > Having been over the code the problem is indeed the bios reporting overlapping > /duplicated ranges. That will cause a crash in mm/bootmem when we try and free > the range twice. > > I suspect you need to add some code to take the E820 map and remove any > overlaps from it, favouring ROM over RAM if the types disagree (for safety), > and filter them before you register them with the bootmem in > arch/i386/kernel/setup.c
...plus prining ?@#@&#&$ BIOS reports invalid mem map seems like good idea, so that bios bugs are fixed.
-- Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt, details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
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