Re: 4GB Physical. Less than 3GB in Linux.

2007-04-17 Thread Jeff Chua
On 4/18/07, Jasper Spaans <[EMAIL PROTECTED]> wrote: Might be a setting in the bios... look for something like memory hole, memory remapping, 4G DRAM, etc. I checked. BIOS says 4GB. No memory hole setting. But I'll play around a bit more. Thanks, Jeff. - To unsubscribe from this list: send th

Re: 4GB Physical. Less than 3GB in Linux.

2007-04-17 Thread Jasper Spaans
On 4/16/07, Jeff Chua <[EMAIL PROTECTED]> wrote: On 4/16/07, Robert Hancock <[EMAIL PROTECTED]> wrote: > Jeff Chua wrote: > > I've noticed that with 4GB physical ram, I'm only see 3098000 MB on > > the Dell 745, and 3107056MB on the IBM X60s. > > > > I've tested with CONFIG_HIGHMEM4G=y, CONFIG_HI

Re: 4GB Physical. Less than 3GB in Linux.

2007-04-16 Thread Stefan Richter
Jeff Chua wrote: > On 4/16/07, Robert Hancock <[EMAIL PROTECTED]> wrote: >> Chipset limitation. It uses up most of the MMIO region above 3GB >> preventing RAM from being mapped there, and doesn't support remapping >> the covered RAM to above 4GB. Nothing the kernel can do about it. > > Well, I gue

Re: 4GB Physical. Less than 3GB in Linux.

2007-04-16 Thread Stefan Richter
Jeff Chua wrote: > On 4/16/07, Stefan Richter <[EMAIL PROTECTED]> wrote: >> The X60 most certainly contains a chipset which severely limits the >> amount of accessible RAM due to issues with remapping of PCIe addresses. ... > I wondered if there's anyone working on a patch for this. All I heard of

Re: 4GB Physical. Less than 3GB in Linux.

2007-04-16 Thread Jeff Chua
On 4/16/07, Robert Hancock <[EMAIL PROTECTED]> wrote: Jeff Chua wrote: > I've noticed that with 4GB physical ram, I'm only see 3098000 MB on > the Dell 745, and 3107056MB on the IBM X60s. > > I've tested with CONFIG_HIGHMEM4G=y, CONFIG_HIGHMEM64G=y, > CONFIG_X86_PAE=y, but nothing makes any diffe

Re: 4GB Physical. Less than 3GB in Linux.

2007-04-16 Thread Jeff Chua
On 4/16/07, Stefan Richter <[EMAIL PROTECTED]> wrote: The X60 most certainly contains a chipset which severely limits the amount of accessible RAM due to issues with remapping of PCIe addresses. Intel explains it somewhere on their web presence. A quick & lazy web search turned this Intel paper

Re: 4GB Physical. Less than 3GB in Linux.

2007-04-16 Thread Robert Hancock
Jeff Chua wrote: I've noticed that with 4GB physical ram, I'm only see 3098000 MB on the Dell 745, and 3107056MB on the IBM X60s. I've tested with CONFIG_HIGHMEM4G=y, CONFIG_HIGHMEM64G=y, CONFIG_X86_PAE=y, but nothing makes any difference. Chipset limitation. It uses up most of the MMIO region

Re: 4GB Physical. Less than 3GB in Linux.

2007-04-16 Thread Stefan Richter
Jeff Chua wrote: > I've noticed that with 4GB physical ram, I'm only see 3098000 MB on > the Dell 745, and 3107056MB on the IBM X60s. > > I've tested with CONFIG_HIGHMEM4G=y, CONFIG_HIGHMEM64G=y, > CONFIG_X86_PAE=y, but nothing makes any difference. > > Tested on Linux 2.6.20, Linux 2.6.21-rc7.

RE: 4GB Physical. Less than 3GB in Linux.

2007-04-16 Thread Fortier,Vincent [Montreal]
> > I've noticed that with 4GB physical ram, I'm only see 3098000 > MB on the Dell 745, and 3107056MB on the IBM X60s. > > I've tested with CONFIG_HIGHMEM4G=y, CONFIG_HIGHMEM64G=y, > CONFIG_X86_PAE=y, but nothing makes any difference. > > Tested on Linux 2.6.20, Linux 2.6.21-rc7. Got similar

4GB Physical. Less than 3GB in Linux.

2007-04-16 Thread Jeff Chua
I've noticed that with 4GB physical ram, I'm only see 3098000 MB on the Dell 745, and 3107056MB on the IBM X60s. I've tested with CONFIG_HIGHMEM4G=y, CONFIG_HIGHMEM64G=y, CONFIG_X86_PAE=y, but nothing makes any difference. Tested on Linux 2.6.20, Linux 2.6.21-rc7. # dmesg copy_e820_map() start: