Re: [patch] sched-2.5.59-A2

William Lee Irwin III
2003-01-18T08:08:04Z

At some point in the past, I wrote:
>> I suspect some of these results may be off on NUMA-Q (or any PAE box)
>> if CONFIG_MTRR was enabled. Michael, Martin, please doublecheck
>> /proc/mtrr and whether CONFIG_MTRR=y. If you didn't enable it, or if
>> you compile times aren't on the order of 5-10 minutes, you're unaffected.
>> The severity of the MTRR regression in 2.5.59 is apparent from:
>> $ cat /proc/mtrr
>> reg00: base=0xc0000000 (3072MB), size=1024MB: uncachable, count=1
>> reg01: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1

On Sat, Jan 18, 2003 at 12:12:31AM -0800, Martin J. Bligh wrote:
> Works for me, I have MTRR on.
> larry:~# cat /proc/mtrr
> reg00: base=0xe0000000 (3584MB), size= 512MB: uncachable, count=1
> reg01: base=0x00000000 ( 0MB), size=16384MB: write-back, count=1

Okay, it sounds like the problem needs some extra RAM to trigger. We
can bounce quads back & forth if need be, but I'll at least take a shot
at finding where it happened before you probably need to look into it.

Thanks,
Bill