Re: [suse-amd64] Puzzling wild variation of execution time
[Readding mailing list] On Sun, Jul 03, 2005 at 12:42:48AM -0700, Sheo Shanker Prasad wrote:
(1) How do I boot with that option.
Just enter it at the grub boot prompt.
(2) I have 4 GB of PC3200 (DDR) memory in 4 dimms that fill two dimms on cpu0 and two dimms on cpu1 installed in Tyan Thunder K8W (S2885 ANRF) system board. In this case what should be the optimal number to put in mem= xxxxM?
Some smaller number with which your application still runs. Let's say mem=3000M This would be just to test if the bad memory is at the end.
(3) Does my present problem have any connection with bug that you and Mark Langsdorf (of AMD, Inc)? [To refresh your memory about this correspondence (which I picked up in the course of Internet Search) this was aTyan BIOS MTRR initialization bug (i.e., Some Tyan AMD BIOS don't initialize the first fixed range MTRR, which caused it to contain random bogus values. When the MTRR tries to duplicate the MTRR state to other CPUs at startup it oopses because of this). I also gathered that you had a patch to overcome this problem. ]
That one caused a crash a boot, so unlikely. -Andi
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Andi Kleen