Dell 2950: 4GB not seen (amd64; works on other 2950:s)
peter.schuller at infidyne.com
Fri Aug 24 12:48:35 PDT 2007
I have a Dell 2950 where my 7-CURRENT amd64 FreeBSD does not see all visible
memory. It has 4 GB of physical RAM. dmesg on boot includes:
usable memory = 4280811520 (4082 MB)
avail memory = 4117716992 (3926 MB)
Yet summing memories visible in top yields ~ 2100 MB.
Of note is that I have 6.2/amd64 on several other 2950:s with 4GB of RAM which
say on boot:
real memory = 5100273664 (4864 MB)
avail memory = 4122443776 (3931 MB)
But has all 4 GB visible in top.
Unfortunately I failed to notice this until after the machine has begun being
used, so I have limited possibilities for rebooting/mucking with BIOS
settings. I was hoping someone could suggest something right off the bat.
In addition on the problem machine the following sysctl values are present:
With hw.usermem being slightly higher (but not 2 GB higher) on the 6.2 system
without a problem:
I was under the impression that memory visibility issues were a thing of the
past on amd64. Any insight?
/ Peter Schuller
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