Messages in this thread | | | Date | Sun, 21 Sep 2003 16:10:09 -0400 (EDT) | From | Matt Hahnfeld <> | Subject | SLOW machine when HIGHMEM enabled (1gb memory, kernel 2.4.22) |
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I have an ASUS P4P800-VM motherboard with 2 sticks of 512mb PC3200 and a single 2.4 ghz P4 processor. The kernel is vanilla 2.4.22 configured for SMP (hyperthreading).
When I use a kernel with high memory support off, I get good performance (despite not being able to use some of my memory). When I enable CONFIG_HIGHMEM4G the remaining memory is detected, but the machine takes a big performance hit and starts running very slow -- ie. kernel compilation looks like it would take 5 days instead of 5 minutes. /proc/meminfo doesn't look particularly strange and no strange log messages show up -- everything just runs slow...
CONFIG_HIGHMEM64G produces the same results...
Any suggestions?
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