Messages in this thread |  | | Date | Thu, 18 Oct 2001 14:45:05 -0700 | From | "Brian C. Thomas" <> | Subject | Re: severe performance degradation on serverworks with high mem |
| |
Hi
I don't know if this helps, but I seem to have stumbled onto a possible "fix" for this...
With 64GB high memory enabled in kernel 2.4.12-ac3, and mtrr turned on, I was able to see all 8GB RAM on my machine by using the old 'append="mem=8000M"' command in my lilo.conf file... AND WITH NO LOSS OF PERFORMANCE!
Does that help anyone with defining where this problem is coming from?
BCT
____________________________ Brian C. Thomas bcthomas@nature.berkeley.edu
On Thu, Oct 18, 2001 at 12:57:15PM -0700, Brian C. Thomas wrote: > Hi > > I have a Supermicro S2QR6 board, which has the "Serverworks serverset > III HE" chipset. (Also, i have 8GB RAM, 4 Xeon P3 700MHz processors, > and an Adaptec Ultra160 SCSI system - aix7xxx, built onto the > motherboard) > > In all the 2.4.x series kernels (even up to 2.4.12-ac3 or > 2.4.13-pre4), as soon as the high memory, 64GB option is enabled, the > server slows down to a crawl, with no load showing. (A "crawl" > example is a kernel recompile time going from ~5 min to >2 hr!) > > I have tried numerous kernel config options, removing scsi support, > networking, and have narrowed the problem down to the serverworks > chipset- on a SC440NX mb, also with 8GB and everything else in the > system, all the new kernels work with no slowdown. > > I've tried... > kernels: 2.4.1, 2.4.3, 2.4.5, 2.4.7-ac9, 2.4.9, 2.4.12 (-pre4, -ac3) > with and w/o mtrr support kernel config > > Any ideas? > > Thanks, > > BCT > > ____________________________ > Brian C. Thomas > bcthomas@nature.berkeley.edu > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |