thats interesting, I never came across that before. I dont know why it needs to map ram like that, and not just use the video card ram. That means if I had a 4GB video card there would be nothing left for me? :)
On Wed, Sep 24, 2008 at 3:07 PM, Sharpe, Sam J <[EMAIL PROTECTED]>wrote: > Because both have different PCI devices? > > I think Janne's point is that: > > Machine 1: 4096 - 3986 = 110 MB of memory mapped to PCI devices and > unavailable to the OS > Machine 2: 4096 - 3286 = 810 MB of memory mapped to PCI devices and > unavailable to the OS > > You don't have Graphics Cards with a total of something like 768MB of > Memory installed in Machine 2 do you? Of course if the machines are > completely identical, then I have no idea. > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:rhelv5-list- > > [EMAIL PROTECTED] On Behalf Of solarflow99 > > Sent: 24 September 2008 15:02 > > To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list > > Subject: Re: [rhelv5-list] PAE Kernel 32 bit RHEL 5.2 64GB RAM > > > > but why does 1 system show 3.2GB and the other 3.9? they both had 4GB > > installed > > > > > > > > On Wed, Sep 24, 2008 at 2:59 PM, Janne Blomqvist > <[EMAIL PROTECTED]> > > wrote: > > > > > > solarflow99 wrote: > > > > > > that makes me wonder about something I have several > computers > > with 4GB of ram using the regular 32 bit kernel (non-PAE) and I see > > different amounts of ram, for instance: > > ]# free -m > > total Mem: 3286 > ]# > > free -m > > total Mem: 3986 > > > > > > > > Probably PCI device memory. They start at 4 GB and go downwards > > (AFAIK most are not capable of 64-bit addressing so they have to be > below > > 4 GB). > > > > Now, many BIOS:es support "PCI hole remapping" (or whatever it's > > called), meaning that the memory that gets clobbered by the PCI > devices > > can be remapped to somewhere beyond the 4 GB limit. However, obviously > > you'll need PAE or x86-64 in order to access this remapped memory. > > > > -- > > Janne Blomqvist > > > > _______________________________________________ > > rhelv5-list mailing list > > [email protected] > > https://www.redhat.com/mailman/listinfo/rhelv5-list > > > > > > > _______________________________________________ > rhelv5-list mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/rhelv5-list >
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