On Wed, Oct 24 2007 at 12:26 +0200, "Rajkumar S" <[EMAIL PROTECTED]> 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. > > --- config-nobigmem 2007-10-24 12:51:42.000000000 +0530 > +++ config-bigmem 2007-10-24 12:48:56.000000000 +0530 > @@ -1,7 +1,7 @@ > # > # Automatically generated make config: don't edit > # Linux kernel version: 2.6.23.1 > -# Wed Oct 24 12:50:21 2007 > +# Tue Oct 23 18:08:30 2007 > # > CONFIG_X86_32=y > CONFIG_GENERIC_TIME=y > @@ -189,10 +189,11 @@ > CONFIG_DELL_RBU=m > CONFIG_DCDBAS=m > CONFIG_DMIID=y > -CONFIG_NOHIGHMEM=y > +# CONFIG_NOHIGHMEM is not set > # CONFIG_HIGHMEM4G is not set > -# CONFIG_HIGHMEM64G is not set > +CONFIG_HIGHMEM64G=y > CONFIG_PAGE_OFFSET=0xC0000000 > +CONFIG_HIGHMEM=y > CONFIG_X86_PAE=y > CONFIG_ARCH_FLATMEM_ENABLE=y > CONFIG_ARCH_SPARSEMEM_ENABLE=y > @@ -211,6 +212,7 @@ > CONFIG_BOUNCE=y > CONFIG_NR_QUICK=1 > CONFIG_VIRT_TO_BUS=y > +# CONFIG_HIGHPTE is not set > # CONFIG_MATH_EMULATION is not set > CONFIG_MTRR=y > CONFIG_EFI=y > @@ -223,11 +225,13 @@ > # CONFIG_HZ_1000 is not set > CONFIG_HZ=250 > CONFIG_KEXEC=y > +# CONFIG_CRASH_DUMP is not set > CONFIG_PHYSICAL_START=0x100000 > # CONFIG_RELOCATABLE is not set > CONFIG_PHYSICAL_ALIGN=0x100000 > CONFIG_HOTPLUG_CPU=y > CONFIG_COMPAT_VDSO=y > +CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y > > # > # Power management options (ACPI, APM) > @@ -1283,6 +1287,7 @@ > CONFIG_I2O=m > CONFIG_I2O_LCT_NOTIFY_ON_CHANGES=y > CONFIG_I2O_EXT_ADAPTEC=y > +CONFIG_I2O_EXT_ADAPTEC_DMA64=y > CONFIG_I2O_CONFIG=m > CONFIG_I2O_CONFIG_OLD_IOCTL=y > CONFIG_I2O_BUS=m > @@ -3323,6 +3328,7 @@ > # CONFIG_DEBUG_SPINLOCK_SLEEP is not set > # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set > # CONFIG_DEBUG_KOBJECT is not set > +# CONFIG_DEBUG_HIGHMEM is not set > CONFIG_DEBUG_BUGVERBOSE=y > # CONFIG_DEBUG_INFO is not set > # CONFIG_DEBUG_VM is not set > > I was having this same issue with debian kernel also (2.6.22-2-686), > ie stock kernel will work, but big mem is slow. Which is why I tried > latest kernel. > > I am posting the full .config at http://pastebin.ca/747758 dmesg while > booting big mem kernel is at http://pastebin.ca/747766 > > raj
I thought that for 4GB of memory the CONFIG_HIGHMEM4G=y CONFIG_HIGHMEM64G is not set would be enough. >From looking in source code the CONFIG_HIGHMEM64G is broken in many respects, in my opinion. It's really a 64-bit with 32-bit quirks enabled. Does it even run on None 64-bit machines? Not many! You have a magnificent 64-bit Machine, why? Boaz - 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/
