On 10/24/07, Robert Hancock <[EMAIL PROTECTED]> wrote: > Rajkumar S wrote: > > Hello, > > > > I am using a Core 2 Duo E6750 CPU on an intel DG33FB mother board with > > 4GB Ram, running Debian Lenny. > > > > Since the box has 4 GB ram I compiled a big mem kernel, but the > > machine is very slow while running big mem kernel. It takes about 37 > > minutes to compile the intel e1000 driver (e1000-7.6.5.tar.gz) from > > intel site. But it's performing normally when using a non big mem > > kernel. The diff of the .config between working and non working is as > > follows. > > Post your contents of /proc/mtrr. Likely a BIOS bug which has been seen > on a number of Intel boards, which doesn't mark all of RAM as cachable.
I have upgraded the bios to latest (v. 0293 October 02, 2007) Previously the /proc/mtrr was: ravanan:~# cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1 reg02: base=0xc0000000 (3072MB), size= 256MB: write-back, count=1 reg03: base=0xcf800000 (3320MB), size= 8MB: uncachable, count=1 reg04: base=0xcf600000 (3318MB), size= 2MB: uncachable, count=1 reg05: base=0xcf500000 (3317MB), size= 1MB: uncachable, count=1 reg06: base=0x100000000 (4096MB), size= 512MB: write-back, count=1 reg07: base=0x120000000 (4608MB), size= 128MB: write-back, count=1 Now after upgrading the bios it's reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1 reg02: base=0xc0000000 (3072MB), size= 256MB: write-back, count=1 reg03: base=0xcf800000 (3320MB), size= 8MB: uncachable, count=1 reg04: base=0xcf400000 (3316MB), size= 4MB: uncachable, count=1 reg05: base=0x100000000 (4096MB), size= 512MB: write-back, count=1 reg06: base=0x120000000 (4608MB), size= 128MB: write-back, count=1 raj - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
